CN109798140A - Km Deep Soft Rock fracture grouting support reinforcement method - Google Patents
Km Deep Soft Rock fracture grouting support reinforcement method Download PDFInfo
- Publication number
- CN109798140A CN109798140A CN201910129143.5A CN201910129143A CN109798140A CN 109798140 A CN109798140 A CN 109798140A CN 201910129143 A CN201910129143 A CN 201910129143A CN 109798140 A CN109798140 A CN 109798140A
- Authority
- CN
- China
- Prior art keywords
- hole
- grouting
- sealing
- anchor
- anchor cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000002787 reinforcement Effects 0.000 title claims abstract description 14
- 238000007569 slipcasting Methods 0.000 claims abstract description 86
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 230000000630 rising effect Effects 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 14
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 11
- 238000000151 deposition Methods 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 163
- 239000007799 cork Substances 0.000 claims description 89
- 239000002002 slurry Substances 0.000 claims description 48
- 239000004568 cement Substances 0.000 claims description 46
- 239000011440 grout Substances 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 238000005553 drilling Methods 0.000 claims description 22
- 238000009792 diffusion process Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 230000010339 dilation Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 210000004911 serous fluid Anatomy 0.000 abstract description 2
- 238000010009 beating Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to underground coal mine grouting and reinforcing support technology fields under km deep-well large ground pressure to the km Deep Soft Rock fracture grouting support reinforcement method of tunnel progress support reinforcement, including beating note anchor cable, mortar depositing construction, rising and draw anchor cable step, the configuration of the present invention is simple, it is reinforced by crack of the slip casting to initial fissure and excavation disturbance generation in roadway surrounding rock, improves the engineering mechanics performance of roadway surrounding rock；Grouting serous fluid dilation angle can be increased by fracture grouting again, the soft rock of the opposite softening of deep wall rock intensity is set to be solidified into higher " concrete " structure of intensity, a closed powerful bearing structure is formed with superficial part country rock, to play self and support system enabling capabilities to greatest extent；Slip casting simultaneously provides stable supporting course also for combination of steel rope, and force-bearing of surrounding rock mass state can be changed by carrying out radial pressure provided by tensioning to combination of steel rope, adjoining rock stability creep compliance is improved, so that it is guaranteed that roadway surrounding rock is steady in a long-term.
Description
Technical field
The invention belongs to underground coal mine grouting and reinforcing support technology field, more particularly to it is a kind of mine, tunnel, building,
The engineerings such as waterpower carry out the km of support reinforcement using slip casting corollary equipment under km deep-well large ground pressure to tunnel
Deep Soft Rock fracture grouting support reinforcement method.
Background technique
Constantly extend as pit mining is horizontal, strata behaviors are more obvious.Using the method for grouting and reinforcing supporting
Effective solution roadway support issues.For km deep-well tunnel, since deep wall rock compression strength is relative to high-ground stress
Aobvious is very weak, and bad hydraulic permeability.Slurry injection technique is difficult to reach ideal effect at present.In addition it is influenced by high-ground stress, lane
Road driving grouting behind shaft or drift lining can only reinforce superficial part rock stratum, and high-ground stress is not resisted after reinforcing, and crack occurs in deep rock stratum, pine
Moving-coil increases with it, surrounding rock structure unstability.
Summary of the invention
It is provided a kind of logical using high-pressure slip-casting technique it is an object of the invention to overcome the deficiencies in the prior art
Fracture grouting reinforcement means is crossed, cement or chemical grout etc. are injected into rock stratum, split with improving the km Deep Soft Rock of nature of ground
Grouting and reinforcing method for protecting support is split, during slip casting, the slurries of Grouting Pipe outlet are applied with additional compression to surrounding rock mass, make
Plastic yielding shearing crack occurs for rock mass, and elder generation is carried out splitting flowing along Weak face by slurries, by the low place of rock mass strength
The place high to intensity squeezes, permeates, and as grouting pressure increases, so that the crack in rock mass is widened or generate new crack, splits
Enter slurry diffusion, the gelling in rock mass, the soft rock of the opposite softening of intensity is solidified into higher " concrete " structure of intensity, and fill
Wall-rock crack makes original Rockmass fractures, hole be filled and be squeezed, and improves rock mass density, improves rock mass physical and mechanics
Property and the property infused of rock stratum increase rock mass globality, the purpose of consolidation grouting are played, so as to effectively control rock mass
It deforms and stablizes.
The object of the present invention is achieved like this:
A kind of km Deep Soft Rock fracture grouting support reinforcement method, including beat note anchor cable, mortar depositing construction, rise and draw anchor cable step,
It is characterized by:
Note anchor cable is played to include the following steps:
Step 1) first is providing to beat in anchor cable section, finishes anchor cable eye according to array pitch position between designing in cable bolting cross-section diagram
Position；
First site clearing sundries is answered before step 2, anchor cable construction, it is ensured that the route of retreat is unimpeded；
Step 3), grouting cable anchor hole are drilled using ZDY2300LX coal mine with crawler type hydraulic drilling rig, are punched by design requirement, hole
Diameter is 75mm, and hole depth must not be less than 15500mm；
Step 4) installs combination of steel rope in grouting cable anchor hole, and after combination of steel rope installation, hole sealing device can after solidifying 48 hours
Slip casting；
2400 × 2400mm of array pitch between step 5), slip casting combination of steel rope；
Mortar depositing construction includes the following steps:
Step 1), high-pressure slip-casting anchor cable line strength have to comply with requirement, and pipeline is intact, cannot reveal；
After step 2, preparation, grouting pump is started, prepared cement mortar is passed through into Grouting Pipe with high-pressure slip-casting pipe
The slip casting into drilling blocks gas-guide tube after gas-guide tube plasma discharge；Slip casting is turned out after gas-guide tube plasma discharge in injected hole
It fills；The ratio of mud according to weight ratio water's cement mortar is 1:0.8~1:1, and cement uses P.O42.5 grades of fresh portland cements,
ACZ-1 additive level is the 8% of cement grout weight；
Grouting pressure controls between 8Mpa-10Mpa；
Step 3) finally continues slip casting to design pressure, as grouting pressure increases, split slurry diffusion in rock mass, gelling,
Solidification fills wall-rock crack；
Rise and anchor cable is drawn to include the following steps:
Drawing of rising is carried out by root to combination grouting cable anchor after 10 days, rises and wants the hole in first levelling grouting cable anchor hole when anchor disk is installed before drawing
Mouthful, anchorage is installed, jack is then put on and carries out drawing of rising, drawing of rising will recycle drawing of rising by stock group, and single anchor cable rises by tensile strength not
It obtains and is less than 100KN.
The combination of steel rope installed in grouting cable anchor hole is a kind of combination of steel rope of at least three sections anchor cable structures,
Three sealing of hole corks are at least installed on anchor cable, wherein being provided with blocking iron ring on the anchor cable in the middle part of grouting cable anchor hole, are being hindered
It is set with inner sealing of hole cork on the subsequent anchor cable of buting iron circle, is set with inner sealing of hole hard tube on the inner subsequent anchor cable of sealing of hole cork,
Slurry outlet is uniformly provided on the anchor cable for stopping iron ring front, the tail portion of inner sealing of hole hard tube has convex edge, at the convex edge
It is set with intermediate sealing of hole cork on anchor cable, intermediate sealing of hole hard tube, centre envelope are set on the anchor cable at intermediate sealing of hole cork rear portion
The tail portion of hole hard tube is set with outer sealing of hole cork with convex edge on the anchor cable at the convex edge, and outer sealing of hole cork is in slip casting
At anchor cable hole aperture, it is set with outer sealing of hole hard tube on the outer subsequent anchor cable of sealing of hole cork, in inner sealing of hole cork and intermediate sealing of hole
Slip casting hose, the grouting cable anchor hole between intermediate sealing of hole cork and outer sealing of hole cork are laid in grouting cable anchor hole between cork
In be laid with sealing grouting hose, inner sealing of hole cork, inner sealing of hole hard tube, intermediate sealing of hole cork, intermediate sealing of hole hard tube, outer sealing of hole are soft
Plug, outer sealing of hole hard tube cover after being shifted on respective position on anchor cable, install anchor cable disk and rigging；Slip casting hose and sealing grouting are soft
Pipe is passed through from two slip casting hose ports on anchor cable disk, avoids anchor cable disk that slip casting hose and sealing grouting hose are squeezed flat；Upper
It states in operating process, first passes through the bore portions slip casting that sealing grouting hose carries out grouting cable anchor hole, cement grout is in pressure
Lower bore portions and the surrounding crack, joint and gap that grouting cable anchor hole is injected by sealing grouting hose of effect, is protected
The slip casting plugging strength of card outside and aperture, outer sealing of hole cork, intermediate sealing of hole cork and cement slurry collective effect, drills anchor cable
Aperture and aperture and the space of anchor cable block tightly, guarantee that cement grout seals crack, joint, gap around anchor cable drilling orifice
It is not in spillage phenomenon when deep hole high-pressure slip-casting after stifled tight；Then pass through slip casting hose again for inner sealing of hole cork and centre
The drilling shallow bore hole space of anchor cable carries out slip casting between sealing of hole cork, and Shallow hole grouting pressure is lower, can after Shallow hole grouting blocks tightly
Be not in spillage phenomenon to guarantee that deep hole grouting reaches higher pressure, while guaranteeing that deep hole grouting reaches and splitting in rock mass
Slurry diffusion, gelling, solidification, fill wall-rock crack；Deep hole grouting is by hollow anchor rope grouting, and by thereon uniformly
For the slurry outlet opened up come what is completed, deep hole grouting pressure is higher, and only deep hole grouting, which reaches higher pressure, just can guarantee cement
Slurries diffuse to bigger range, and cement grout better filling fracture, compacted country rock, improves reinforcing work at network skeleton
Industry, to improve the globality and self-bearing capacity of country rock.
The present invention has following good effect: the configuration of the present invention is simple, by slip casting to the initial fissure in roadway surrounding rock
And the crack that excavation disturbance generates is reinforced, and the engineering mechanics performance of roadway surrounding rock is improved；It can be increased again by fracture grouting
Grouting serous fluid dilation angle makes the soft rock of the opposite softening of deep wall rock intensity be solidified into higher " concrete " structure of intensity, with superficial part
Country rock forms a closed powerful bearing structure, to play self and support system support energy to greatest extent
Power；Slip casting simultaneously provides stable supporting course also for combination of steel rope, carries out radial pressure provided by tensioning to combination of steel rope
Force-bearing of surrounding rock mass state can be changed, adjoining rock stability creep compliance is improved, so that it is guaranteed that roadway surrounding rock is steady in a long-term.
Detailed description of the invention
Fig. 1 is fracture grouting schematic diagram of the invention.
Fig. 2 is mortar depositing construction structural schematic diagram of the invention.
Fig. 3 is the combination of steel rope structural representation installed in grouting cable anchor hole in the horizontal direction in mortar depositing construction of the invention
Figure.
Specific embodiment
As shown in Figure 1, 2, a kind of km Deep Soft Rock fracture grouting support reinforcement method, including beat, infuse anchor cable, slip casting is applied
Work rises and draws the processes such as anchor cable, in which:
1, note anchor cable is played to include the following steps:
Step 1) first is providing to beat in anchor cable section, finishes anchor cable eye according to array pitch position between designing in cable bolting cross-section diagram
Position；
First site clearing sundries is answered before step 2, anchor cable construction, it is ensured that the route of retreat is unimpeded；
Step 3), grouting cable anchor hole 17 are drilled using ZDY2300LX coal mine with crawler type hydraulic drilling rig, are punched by design requirement,
Aperture is 75mm, and hole depth must not be less than 15500mm；
Step 4) installs combination of steel rope 12 in grouting cable anchor hole 16, after combination of steel rope installation, after hole sealing device solidifies 48 hours
It can deep hole grouting；
2400 × 2400mm of array pitch between step 5), slip casting combination of steel rope；
2, mortar depositing construction includes the following steps:
Step 1), high-pressure slip-casting anchor cable line strength have to comply with requirement, and pipeline is intact, cannot reveal；
After step 2, preparation, grouting pump 5 is started, with high-pressure slip-casting pipe and high pressure valve 6 by prepared cement mortar
The slip casting into deep hole by Grouting Pipe, blocks gas-guide tube after gas-guide tube plasma discharge；Slip casting is turned out after gas-guide tube plasma discharge to infuse
It is already filled in slurry deep hole；The ratio of mud according to weight ratio water's cement mortar is 1:0.8~1:1, and cement is new using P.O42.5 grades
Fresh portland cement, ACZ-1 additive level are the 8% of cement grout weight；Grouting pressure controls between 8Mpa-10Mpa；
Step 3) finally continues deep hole grouting to design pressure, as grouting pressure increases, split slurry diffusion in rock mass,
Gelling, solidification, fill wall-rock crack；
3, rising draws anchor cable to include the following steps:
Drawing of rising is carried out by root to combination grouting cable anchor after 10 days, rises and wants the hole in first levelling grouting cable anchor hole when anchor disk is installed before drawing
Mouthful, anchorage is installed, jack is then put on and carries out drawing of rising, drawing of rising will recycle drawing of rising by stock group, and single anchor cable rises by tensile strength not
It obtains and is less than 100KN.
Before above-mentioned deep hole grouting, the combination of steel rope installed in grouting cable anchor hole is a kind of at least three sections of anchors
The combination of steel rope of Cable Structure is at least equipped with three sealing of hole corks on anchor cable, wherein on the anchor cable in the middle part of grouting cable anchor hole
It is provided with blocking iron ring, inner sealing of hole cork is set on stopping the subsequent anchor cable of iron ring, in the inner subsequent anchor cable of sealing of hole cork
On be set with inner sealing of hole hard tube, stop iron ring front hollow anchor cable on be uniformly provided with slurry outlet, inner sealing of hole hard tube
Tail portion has convex edge, intermediate sealing of hole cork is set on the anchor cable at the convex edge, on the anchor cable at intermediate sealing of hole cork rear portion
It is set with intermediate sealing of hole hard tube, the tail portion of intermediate sealing of hole hard tube is set with covering on the anchor cable at the convex edge with convex edge
Hole cork, outer sealing of hole cork are at the aperture of grouting cable anchor hole, and it is hard to be set with outer sealing of hole on the outer subsequent anchor cable of sealing of hole cork
Pipe, is laid with slip casting hose in the grouting cable anchor hole between inner sealing of hole cork and intermediate sealing of hole cork, intermediate sealing of hole cork with
Sealing grouting hose, inner sealing of hole cork, inner sealing of hole hard tube, intermediate sealing of hole are laid in grouting cable anchor hole between outer sealing of hole cork
Cork, intermediate sealing of hole hard tube, outer sealing of hole cork, outer sealing of hole hard tube cover after being shifted on respective position on anchor cable, install anchor cable disk
And rigging；Slip casting hose and sealing grouting hose are passed through from two slip casting hose ports on anchor cable disk, avoid anchor cable disk slip casting
Hose and sealing grouting hose squeeze flat；During aforesaid operations, the hole that sealing grouting hose carries out grouting cable anchor hole is first passed through
Oral area dispensing slurry, cement grout pass through under the effect of the pressure sealing grouting hose be injected into grouting cable anchor hole bore portions and
Surrounding crack, joint and gap guarantee external and aperture slip casting plugging strength, outer sealing of hole cork, intermediate sealing of hole cork
With cement slurry collective effect, anchor cable drilling orifice and aperture and the space of anchor cable are blocked tightly, guarantee cement grout anchor cable
Crack around drilling orifice, joint, gap block it is tight after, be not in spillage phenomenon when deep hole high-pressure slip-casting；Then lead to again
It crosses slip casting hose and the drilling shallow bore hole space of anchor cable between inner sealing of hole cork and intermediate sealing of hole cork is subjected to slip casting, Shallow hole grouting pressure
Power is lower, after Shallow hole grouting blocks tightly, it is ensured that it is not in spillage phenomenon that deep hole grouting, which reaches higher pressure, simultaneously
Guarantee that deep hole grouting reaches slurry diffusion, gelling, the solidification split in rock mass, fills wall-rock crack, above-mentioned sealing of hole and shallow bore hole note
Slurry is for guaranteeing the splitting of deep hole grouting；Deep hole grouting is by hollow anchor rope grouting, and by uniformly opening thereon
If slurry outlet come what is completed, deep hole grouting pressure is higher, and only deep hole grouting, which reaches higher pressure, just can guarantee cement slurry
Liquid diffuses to bigger range, and cement grout better filling fracture, compacted country rock, improves reinforcing operation at network skeleton,
To improve the globality and self-bearing capacity of country rock.
The fracture grouting reinforcement means of final step uses high-pressure slip-casting technique, and cement or chemical grout etc. are injected rock
Layer, to improve nature of ground.During slip casting, the slurries of Grouting Pipe outlet are applied with additional compression to surrounding rock mass, make
Plastic yielding shearing crack occurs for rock mass, and elder generation is carried out splitting flowing along Weak face by slurries, by the low place of rock mass strength
The place high to intensity squeezes, permeates.As grouting pressure increases, the crack in rock mass is made to widen or generate new crack.It splits
Enter slurry diffusion, the gelling in rock mass, the soft rock of the opposite softening of intensity is solidified into higher " concrete " structure of intensity, and fill
Wall-rock crack makes original Rockmass fractures, hole be filled and be squeezed, and improves rock mass density, improves rock mass physical and mechanics
Property and the property infused of rock stratum increase rock mass globality, the purpose of consolidation grouting are played, so as to effectively control rock mass
It deforms and stablizes.
Concrete construction method is as follows:
One, it beats, infuse anchor cable:
(1) first beaten in anchor cable section in regulation, finish anchor cable eye position according to array pitch position between designing in cable bolting cross-section diagram.
(2) first site clearing sundries is answered before anchor cable construction, it is ensured that the route of retreat is unimpeded.
(3) grouting cable anchor hole is drilled using ZDY2300LX coal mine with crawler type hydraulic drilling rig, is punched by design requirement, hole
Diameter is 75mm, and hole depth must not be less than 15500mm；
(4) after combination of steel rope installation, hole sealing device can slip casting after solidifying 48 hours.
(5) 2400 × 2400mm of array pitch between slip casting combination of steel rope.
Two, mortar depositing construction (attached drawing 2):
(1) high-pressure slip-casting anchor cable line strength has to comply with requirement, and pipeline is intact, cannot reveal.
(2) after preparation, grouting pump (ZBYSB50/18-7.5) is started with high-pressure slip-casting pipe by prepared water
Cement mortar is blocked gas-guide tube after gas-guide tube plasma discharge by Grouting Pipe slip casting into drilling；Note is turned out after gas-guide tube plasma discharge
Slurry is already filled in injected hole.
(3) finally continue slip casting to design pressure, as grouting pressure increases, split slurry diffusion in rock mass, gelling,
Solidification fills wall-rock crack.
(4) the ratio of mud of cement grout is 1:0.8~1:1(weight ratio), cement uses P.O42.5 grades of fresh silicate cements
Mud, ACZ-1 additive level are the 8% of cement grout weight.
(5) grouting pressure control is between 8Mpa-10Mpa.
Three, rise and draw anchor cable: drawing of rising being carried out by root to combination grouting cable anchor after 10 days, rise first levelling when anchor disk is installed before drawing
Aperture, installation and anchorage, then put on jack and carry out drawing of rising, and drawing of rising will recycle drawing of rising by stock group, and single anchor cable, which rises, to be drawn by force
Degree cannot be less than 100KN.
As shown in Fig. 2, cement 1 and water 2 become cement grout 20, the cement grout 20 of finished product by the stirring of blender 3
It is contained in cement slurry bucket 4, the ratio of mud according to weight ratio water's slurry liquid is 1:0.8~1:1, and cement is new using P.O42.5 grades
Fresh portland cement, ACZ-1 additive level are the 8% of cement grout weight；Cement grout 20 passes through grouting pump 5, high pressure valve
6, pressure valve 7 and grout pipe line 8 enter in mixer 9, and mixer 9 passes through mixing feed pipe for mortar 10 and relief valve 11, high pressure valve
6, cement grout is driven into grouting cable anchor hole 16 by pressure gauge 7.The group of 3 diameter 22mm is installed in grouting cable anchor hole 16
Anchor cable 12 is closed, after combination of steel rope installation, hole sealing device 13 can deep hole grouting after solidifying 48 hours；Fracture grouting reinforcement means is adopted
With high pressure deep hole grouting technique, cement or chemical grout etc. are injected into rock stratum, to improve nature of ground.During slip casting, note
The cement grout 20 of slurry pipe outlet is applied with additional compression to surrounding rock mass, makes rock mass that plastic yielding shearing crack occur, and
Elder generation is carried out splitting flowing along Weak face by slurries, and the place low from rock mass strength squeezes to the high place of intensity, permeates, infiltration
The slurries 19 of infiltration increase with grouting pressure, and the crack in rock mass is made to widen or generate new crack 18, form splitting surface 17.
Slurry diffusion, the gelling in rock mass are split, the soft rock of the opposite softening of intensity is solidified into higher " concrete " structure of intensity, Er Qiechong
Wall-rock crack is filled out, original Rockmass fractures, hole is made to be filled and be squeezed, improves rock mass density, improves rock mass physical and power
The property infused of property and rock stratum is learned, increases rock mass globality, the purpose of consolidation grouting is played, so as to effectively control rock mass
Deformation and stabilization.It starts grouting pump 5 and prepared cement mortar is passed through into mixing feed pipe for mortar 10 to drilling with grout pipe line 8
(grouting cable anchor hole 16) interior slip casting, blocks gas-guide tube after 15 plasma discharge of gas-guide tube；Slip casting is turned out after gas-guide tube plasma discharge to infuse
Slurry is already filled in hole.Finally continue slip casting to design pressure, as grouting pressure increases, split slurry diffusion in rock mass,
Gelling, solidification, fill wall-rock crack.
The combination of steel rope 12 installed in grouting cable anchor hole 16 is a kind of combination anchor of at least three sections anchor cable structures
Rope is at least equipped with three sealing of hole corks 14 on anchor cable, wherein being provided with blocking iron on the anchor cable in the middle part of grouting cable anchor hole
Circle is set with inner sealing of hole cork on stopping the subsequent anchor cable of iron ring, is set with inner envelope on the inner subsequent anchor cable of sealing of hole cork
Hole hard tube is uniformly provided with slurry outlet on the anchor cable for stopping iron ring front, and the tail portion of inner sealing of hole hard tube has convex edge, convex at this
It is set with intermediate sealing of hole cork on anchor cable at, intermediate sealing of hole hard tube is set on the anchor cable at intermediate sealing of hole cork rear portion,
The tail portion of intermediate sealing of hole hard tube is set with outer sealing of hole cork with convex edge on the anchor cable at the convex edge, at outer sealing of hole cork
At the aperture of grouting cable anchor hole, it is set with outer sealing of hole hard tube on the outer subsequent anchor cable of sealing of hole cork, in inner sealing of hole cork in
Between be laid with slip casting hose, the slip casting between intermediate sealing of hole cork and outer sealing of hole cork in grouting cable anchor hole between sealing of hole cork
It is laid with sealing grouting hose in anchor cable hole, it is inner sealing of hole cork, inner sealing of hole hard tube, intermediate sealing of hole cork, intermediate sealing of hole hard tube, outer
Sealing of hole cork, outer sealing of hole hard tube cover after being shifted on respective position on anchor cable, install anchor cable disk and rigging；Slip casting hose and sealing
Slip casting hose is passed through from two slip casting hose ports on anchor cable disk, avoids anchor cable disk that slip casting hose and sealing grouting hose are squeezed
It is flat；During aforesaid operations, the bore portions slip casting that sealing grouting hose carries out grouting cable anchor hole is first passed through, cement grout exists
Bore portions and the surrounding crack, joint and sky in grouting cable anchor hole are injected under the action of pressure by sealing grouting hose
Gap guarantees external and aperture slip casting plugging strength, outer sealing of hole cork, intermediate sealing of hole cork and cement slurry collective effect, anchor
Rope drilling orifice and aperture and the space of anchor cable block it is tight, guarantee cement grout crack around anchor cable drilling orifice, joint,
Gap block it is tight after, be not in spillage phenomenon when deep hole high-pressure slip-casting；Then pass through slip casting hose again for inner sealing of hole cork
The drilling shallow bore hole space of anchor cable carries out slip casting between intermediate sealing of hole cork, and Shallow hole grouting pressure is lower, and Shallow hole grouting blocks tight
After close, it is ensured that it is not in spillage phenomenon that deep hole grouting, which reaches higher pressure, while guarantee deep hole grouting reach split into
Slurry diffusion, gelling, solidification in rock mass, fill wall-rock crack；Deep hole grouting and is passed through by hollow anchor rope grouting
For the slurry outlet uniformly opened up thereon come what is completed, deep hole grouting pressure is higher, and only deep hole grouting reaches higher pressure ability
Guarantee that cement grout diffuses to bigger range, cement grout better filling fracture, compacted country rock, is improved and mended network skeleton
Strong reinforcement operation, to improve the globality and self-bearing capacity of country rock.
The combination of steel rope is by stopping iron ring to combine three anchor cables, and specific structure is to stop iron ring
On side by side direction (horizontal direction) open up there are three installation anchor cable anchor cable fixation hole or stop iron ring on vertical direction (hang down
Histogram to) set there are three the anchor cable fixation hole of installation anchor cable or opened up on stopping iron ring on apex angle in equilateral triangle
There are three the anchor cable fixation holes of installation anchor cable, and three anchor cables are installed in the anchor cable fixation hole for stopping iron ring.On every anchor cable
It is set with sealing of hole hard tube.
As shown in figure 3, horizontal direction is opened up there are three the anchor cable fixation hole of installation anchor cable on stopping iron ring, stopping iron
Three anchor cables are installed in the anchor cable fixation hole of circle.The combination of steel rope 12 installed in the hole of grouting cable anchor in the horizontal direction is one
The combination of steel rope of at least three sections anchor cable structures of kind, is at least equipped with three sealing of hole corks, wherein in grouting cable anchor hole on anchor cable
It is provided on the anchor cable at middle part and stops iron ring 21, inner sealing of hole cork 22 is set on stopping the subsequent anchor cable of iron ring 21, inner
It is set with inner sealing of hole hard tube 23 on the subsequent anchor cable of sealing of hole cork 22, is uniformly provided with out on the anchor cable for stopping 21 front of iron ring
Hole 24 is starched, the tail portion of inner sealing of hole hard tube 23 has convex edge 25, is set with intermediate sealing of hole cork 26 on the anchor cable at the convex edge 25,
Intermediate sealing of hole hard tube 27 is set on the anchor cable at intermediate 26 rear portion of sealing of hole cork, the tail portion of intermediate sealing of hole hard tube 27 is with convex
Along 28, outer sealing of hole cork 29 is set on the anchor cable at the convex edge, outer sealing of hole cork is at the aperture of grouting cable anchor hole, outside
Outer sealing of hole hard tube 30 is set on the subsequent anchor cable of sealing of hole cork, the note between inner sealing of hole cork 22 and intermediate sealing of hole cork 26
It is laid with slip casting hose 31 in slurry anchor cable hole, is laid in the grouting cable anchor hole between intermediate sealing of hole cork 26 and outer sealing of hole cork 29
There are sealing grouting hose 32, inner sealing of hole cork 22, inner sealing of hole hard tube 23, intermediate sealing of hole cork 26, intermediate sealing of hole hard tube 27, covering
After hole cork 29,30 sets of outer sealing of hole hard tube are shifted on anchor cable on respective position, anchor cable disk 33 and rigging 34 are installed；Slip casting hose
It is passed through with sealing grouting hose from two slip casting hose ports 35 on anchor cable disk, avoids anchor cable disk slip casting hose and sealing grouting
Hose squeezes flat；During aforesaid operations, the bore portions slip casting that sealing grouting hose carries out grouting cable anchor hole, cement are first passed through
Slurries pass through bore portions and the surrounding crack, section that sealing grouting hose is injected into grouting cable anchor hole under the effect of the pressure
Reason and gap guarantee that external and aperture slip casting plugging strength, outer sealing of hole cork, intermediate sealing of hole cork and cement slurry are made jointly
With anchor cable drilling orifice and aperture and the space of anchor cable being blocked tight, guarantee cement grout splitting around anchor cable drilling orifice
Gap, joint, gap block it is tight after, be not in spillage phenomenon when deep hole high-pressure slip-casting；Then again by slip casting hose will in
The drilling shallow bore hole space of anchor cable carries out slip casting between sealing of hole cork and intermediate sealing of hole cork, and Shallow hole grouting pressure is lower, shallow bore hole note
After slurry blocks tightly, it is ensured that it is not in spillage phenomenon that deep hole grouting, which reaches higher pressure, while guaranteeing deep hole grouting
Reach slurry diffusion, gelling, the solidification split in rock mass, fills wall-rock crack；Deep hole grouting is by infusing to hollow anchor cable
Slurry, and the slurry outlet by uniformly opening up thereon, come what is completed, deep hole grouting pressure is higher, and only deep hole grouting reaches higher
Pressure just can guarantee that cement grout diffuses to bigger range, and cement grout better filling fracture, compacted encloses network skeleton
Rock improves reinforcing operation, to improve the globality and self-bearing capacity of country rock.
Claims (2)
1. a kind of km Deep Soft Rock fracture grouting support reinforcement method, including beat note anchor cable, mortar depositing construction, rise and anchor cable is drawn to walk
Suddenly, it is characterised in that:
Note anchor cable is played to include the following steps:
Step 1) first is providing to beat in anchor cable section, finishes anchor cable eye according to array pitch position between designing in cable bolting cross-section diagram
Position；
First site clearing sundries is answered before step 2, anchor cable construction, it is ensured that the route of retreat is unimpeded；
Step 3), grouting cable anchor hole are drilled using ZDY2300LX coal mine with crawler type hydraulic drilling rig, are punched by design requirement, hole
Diameter is 75mm, and hole depth must not be less than 15500mm；
Step 4) installs combination of steel rope in grouting cable anchor hole, and after combination of steel rope installation, hole sealing device can after solidifying 48 hours
Slip casting；
2400 × 2400mm of array pitch between step 5), slip casting combination of steel rope；
Mortar depositing construction includes the following steps:
Step 1), high-pressure slip-casting anchor cable line strength have to comply with requirement, and pipeline is intact, cannot reveal；
After step 2, preparation, grouting pump is started, prepared cement mortar is passed through into Grouting Pipe with high-pressure slip-casting pipe
The slip casting into drilling blocks gas-guide tube after gas-guide tube plasma discharge；Slip casting is turned out after gas-guide tube plasma discharge in injected hole
It fills；The ratio of mud according to weight ratio water's cement mortar is 1:0.8~1:1, and cement uses P.O42.5 grades of fresh portland cements,
ACZ-1 additive level is the 8% of cement grout weight；Grouting pressure controls between 8Mpa-10Mpa；
Step 3) finally continues slip casting to design pressure, as grouting pressure increases, split slurry diffusion in rock mass, gelling,
Solidification fills wall-rock crack；
Rise and anchor cable is drawn to include the following steps:
Drawing of rising is carried out by root to combination grouting cable anchor after 10 days, rises and wants the hole in first levelling grouting cable anchor hole when anchor disk is installed before drawing
Mouthful, anchorage is installed, jack is then put on and carries out drawing of rising, drawing of rising will recycle drawing of rising by stock group, and single anchor cable rises by tensile strength not
It obtains and is less than 100KN.
2. km Deep Soft Rock fracture grouting support reinforcement method according to claim 1, it is characterised in that: it is described
The combination of steel rope installed in grouting cable anchor hole is a kind of combination of steel rope of at least three sections anchor cable structures, is at least equipped on anchor cable
Three sealing of hole corks are stopping the subsequent anchor cable of iron ring wherein being provided with blocking iron ring on the anchor cable in the middle part of grouting cable anchor hole
On be set with inner sealing of hole cork, on the inner subsequent anchor cable of sealing of hole cork be set with inner sealing of hole hard tube, stopping iron ring front
Slurry outlet is uniformly provided on anchor cable, the tail portion of inner sealing of hole hard tube has convex edge, is set with centre on the anchor cable at the convex edge
Sealing of hole cork, is set with intermediate sealing of hole hard tube on the anchor cable at intermediate sealing of hole cork rear portion, the tail portion of intermediate sealing of hole hard tube also band
There is convex edge, outer sealing of hole cork is set on the anchor cable at the convex edge, outer sealing of hole cork is at the aperture of grouting cable anchor hole, outside
Outer sealing of hole hard tube is set on the subsequent anchor cable of sealing of hole cork, the grouting cable anchor between inner sealing of hole cork and intermediate sealing of hole cork
Slip casting hose is laid in hole, it is soft to be laid with sealing grouting in the grouting cable anchor hole between intermediate sealing of hole cork and outer sealing of hole cork
Pipe, inner sealing of hole cork, inner sealing of hole hard tube, intermediate sealing of hole cork, intermediate sealing of hole hard tube, outer sealing of hole cork, outer sealing of hole hard tube cover
After being shifted on respective position on anchor cable, anchor cable disk and rigging are installed；Slip casting hose and sealing grouting hose are from two on anchor cable disk
A slip casting hose port passes through, and avoids anchor cable disk that slip casting hose and sealing grouting hose are squeezed flat；During aforesaid operations, first lead to
The bore portions slip casting that sealing grouting hose carries out grouting cable anchor hole is crossed, cement grout passes through sealing grouting under the effect of the pressure
Hose is injected into bore portions and the surrounding crack, joint and gap in grouting cable anchor hole, guarantees external and aperture slip casting
Plugging strength, outer sealing of hole cork, intermediate sealing of hole cork and cement slurry collective effect, anchor cable drilling orifice and aperture and anchor cable
Space block it is tight, guarantee cement grout crack around anchor cable drilling orifice, joint, gap block it is tight after, deep hole high pressure
It is not in spillage phenomenon when slip casting；Then pass through slip casting hose again for anchor cable between inner sealing of hole cork and intermediate sealing of hole cork
Drilling shallow bore hole space carry out slip casting, Shallow hole grouting pressure is lower, Shallow hole grouting block it is tight after, it is ensured that deep hole grouting reaches
Be not in spillage phenomenon to higher pressure, while guaranteeing that deep hole grouting reaches the slurry diffusion split in rock mass, is gelled, is solid
Change, fills wall-rock crack；Deep hole grouting is by hollow anchor rope grouting, and the slurry outlet by uniformly opening up thereon is come complete
At, deep hole grouting pressure is higher, and only deep hole grouting reaches higher pressure just and can guarantee that cement grout diffuses to bigger
Range, cement grout better filling fracture, compacted country rock, improve reinforcing operation at network skeleton, to improve country rock
Globality and self-bearing capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129143.5A CN109798140B (en) | 2019-02-21 | 2019-02-21 | Splitting grouting reinforcement support method for kilometer deep well soft rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129143.5A CN109798140B (en) | 2019-02-21 | 2019-02-21 | Splitting grouting reinforcement support method for kilometer deep well soft rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109798140A true CN109798140A (en) | 2019-05-24 |
| CN109798140B CN109798140B (en) | 2020-12-18 |
Family
ID=66561120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910129143.5A Active CN109798140B (en) | 2019-02-21 | 2019-02-21 | Splitting grouting reinforcement support method for kilometer deep well soft rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109798140B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137250A (en) * | 2021-05-28 | 2021-07-20 | 中建隧道建设有限公司 | Method for quickly pre-reinforcing and grouting tunnel face excavation of deep-buried high-pressure water-rich tunnel |
| CN113153396A (en) * | 2021-04-19 | 2021-07-23 | 华北科技学院 | Hole sealing, grouting and water plugging reinforcing method for anchor cable holes in roadway water spraying area |
| CN114233352A (en) * | 2021-12-02 | 2022-03-25 | 中煤科工开采研究院有限公司 | Multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure |
| CN114233393A (en) * | 2021-11-12 | 2022-03-25 | 中国电建集团华东勘测设计研究院有限公司 | Underground engineering surrounding rock-stress double-target mutual feedback combined regulation and control method |
| CN117108318A (en) * | 2023-10-25 | 2023-11-24 | 北京科技大学 | Surrounding rock reinforcing grouting system for underground coal mine roadway |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900446A (en) * | 2012-10-23 | 2013-01-30 | 中国矿业大学 | Step-by-step strengthening method by anchoring and forming hole in downward sleeve of cracking medium |
| CN103758533A (en) * | 2014-01-06 | 2014-04-30 | 中国矿业大学 | High-low pressure integrated roadway grouting reinforcement method |
| CN205189911U (en) * | 2015-10-23 | 2016-04-27 | 于守东 | Cellular type slip casting anchor rope is proclaimed oneself in antiskid |
| CN107747498A (en) * | 2017-09-06 | 2018-03-02 | 中国科学院力学研究所 | A kind of mould bag filled type anchor bolt grouting apparatus and method |
| CN107829767A (en) * | 2017-11-30 | 2018-03-23 | 安徽理工大学 | A kind of block assembly formula, which allows, presses hollow grouting anchor and its construction method |
| CN108756970A (en) * | 2018-07-12 | 2018-11-06 | 安徽理工大学 | A kind of hollow grouting cable anchor of segmented and application method |
| CN108868827A (en) * | 2018-07-07 | 2018-11-23 | 平煤神马建工集团有限公司 | Km deep-well high-ground stress combination of steel rope injection hole sealing device and method for sealing |
| CN108915745A (en) * | 2018-08-30 | 2018-11-30 | 沈阳建筑大学 | The interim anchor cable of Fuse Type of permanent support grouted anchor bar combined support structure |
-
2019
- 2019-02-21 CN CN201910129143.5A patent/CN109798140B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900446A (en) * | 2012-10-23 | 2013-01-30 | 中国矿业大学 | Step-by-step strengthening method by anchoring and forming hole in downward sleeve of cracking medium |
| CN103758533A (en) * | 2014-01-06 | 2014-04-30 | 中国矿业大学 | High-low pressure integrated roadway grouting reinforcement method |
| CN205189911U (en) * | 2015-10-23 | 2016-04-27 | 于守东 | Cellular type slip casting anchor rope is proclaimed oneself in antiskid |
| CN107747498A (en) * | 2017-09-06 | 2018-03-02 | 中国科学院力学研究所 | A kind of mould bag filled type anchor bolt grouting apparatus and method |
| CN107829767A (en) * | 2017-11-30 | 2018-03-23 | 安徽理工大学 | A kind of block assembly formula, which allows, presses hollow grouting anchor and its construction method |
| CN108868827A (en) * | 2018-07-07 | 2018-11-23 | 平煤神马建工集团有限公司 | Km deep-well high-ground stress combination of steel rope injection hole sealing device and method for sealing |
| CN108756970A (en) * | 2018-07-12 | 2018-11-06 | 安徽理工大学 | A kind of hollow grouting cable anchor of segmented and application method |
| CN108915745A (en) * | 2018-08-30 | 2018-11-30 | 沈阳建筑大学 | The interim anchor cable of Fuse Type of permanent support grouted anchor bar combined support structure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153396A (en) * | 2021-04-19 | 2021-07-23 | 华北科技学院 | Hole sealing, grouting and water plugging reinforcing method for anchor cable holes in roadway water spraying area |
| CN113137250A (en) * | 2021-05-28 | 2021-07-20 | 中建隧道建设有限公司 | Method for quickly pre-reinforcing and grouting tunnel face excavation of deep-buried high-pressure water-rich tunnel |
| CN113137250B (en) * | 2021-05-28 | 2023-06-30 | 中建隧道建设有限公司 | Rapid pre-reinforcement grouting method for tunnel face excavation of deep-buried high-pressure water-rich tunnel |
| CN114233393A (en) * | 2021-11-12 | 2022-03-25 | 中国电建集团华东勘测设计研究院有限公司 | Underground engineering surrounding rock-stress double-target mutual feedback combined regulation and control method |
| CN114233393B (en) * | 2021-11-12 | 2024-05-24 | 中国电建集团华东勘测设计研究院有限公司 | Underground engineering surrounding rock-stress double-target mutual feedback combined regulation and control method |
| CN114233352A (en) * | 2021-12-02 | 2022-03-25 | 中煤科工开采研究院有限公司 | Multi-section grooving and splitting grouting modified surrounding rock cooperative control method and structure |
| CN117108318A (en) * | 2023-10-25 | 2023-11-24 | 北京科技大学 | Surrounding rock reinforcing grouting system for underground coal mine roadway |
| CN117108318B (en) * | 2023-10-25 | 2024-01-02 | 北京科技大学 | Surrounding rock reinforcement grouting system for underground coal mine tunnels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109798140B (en) | 2020-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109798140A (en) | Km Deep Soft Rock fracture grouting support reinforcement method | |
| CN104453913B (en) | A kind of Shaft Stopes front pre-grouting method | |
| CN103334770B (en) | One is grown up reverse-slope tunnel ultra high water pressure rich water zone of fracture construction method | |
| CN112855223B (en) | Coal roadway-advanced curtain space integrated grouting method after penetrating goaf wall | |
| CN101748741B (en) | Construction method of concrete supporting structure | |
| CN110388223B (en) | A segmented grouting hollow grouting anchor cable and using method | |
| CN204703160U (en) | Two anchoring section prestressed anchor Cable Structure | |
| CN104481560A (en) | Roadway roof aquifer treatment method | |
| CN205025479U (en) | Administer bottom plate support system of soft rock tunnel pucking | |
| CN105422128A (en) | Method for preventing goaf gas leakage in deep shaft gob-side entry driving | |
| CN103669346A (en) | Sleeve valve pipe and application to landslide control | |
| CN104879149A (en) | Bolt-grouting support method for roadway in three-soft high-stress region | |
| CN108868827A (en) | Km deep-well high-ground stress combination of steel rope injection hole sealing device and method for sealing | |
| CN107339108A (en) | The layer of sand location subway pipe shed construction method of underground water enrichment | |
| CN105937221A (en) | Manufacturing method for drilled grouting piles | |
| CN109505641A (en) | A kind of soft-rock tunnel bottom plate anchor pouring reinforcement method | |
| CN208136918U (en) | A kind of tubular type Soil-Nailing Wall Structure | |
| CN107035389B (en) | A kind of construction method for grouting reinforcement and earth's surface construction method | |
| CN206110124U (en) | Bored concrete pile stake end post grouting device | |
| CN113958324B (en) | Method for grouting and reinforcing deep drilling of roadway bottom plate | |
| CN109854281A (en) | The method for protecting support of the lower rock compound cross-section stratum jacking construction of upper soil | |
| CN202531098U (en) | Broken coal-rock mass grouting system | |
| CN1059012C (en) | Technology for quickly resuming normal construction after wellhole submerged by sudden water | |
| CN110778332B (en) | Different-diameter adaptive expansion grouting device and reinforcement method at the cracked and damaged part of the tunnel secondary lining | |
| CN112392524A (en) | Geotechnical engineering sectional type cavity slip casting anchor rope device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201130 Address after: 467000 No. 21 miner Road, Henan, Pingdingshan Applicant after: PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. Applicant after: NO.6 MINE, PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. Address before: 467000 Xinxin street, Pinghua coal six, Xinhua District, Pingdingshan, Henan Applicant before: NO.6 MINE, PINGDINGSHAN TIANAN COAL MINING Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |