CN109057818A - A kind of combining anchor method for protecting support of mine high stress and soft rock mine roadway - Google Patents
A kind of combining anchor method for protecting support of mine high stress and soft rock mine roadway Download PDFInfo
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- CN109057818A CN109057818A CN201810919714.0A CN201810919714A CN109057818A CN 109057818 A CN109057818 A CN 109057818A CN 201810919714 A CN201810919714 A CN 201810919714A CN 109057818 A CN109057818 A CN 109057818A
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- anchor pole
- roof support
- suspension roof
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- 239000011435 rock Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000000725 suspension Substances 0.000 claims description 99
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 239000011152 fibreglass Substances 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 239000011521 glass Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007547 defect Effects 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
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
本发明涉及一种矿山高应力软岩巷道的锚杆联合支护方法。技术方案是：针对矿山高应力软岩巷道不同位置处锚杆的受力不同，先将矿山高应力软岩巷道划分成8个不同的锚杆支护区域，再针对巷道的垂直应力大于水平应力和水平应力大于垂直应力的两种情况，分别在不同的锚杆支护区域中安装不同材质和不同长度的锚杆。安装材质不同的锚杆能充分发挥各类材料的支护优势，安装长度不同的锚杆，采用长锚杆与短锚杆联合支护的方法，使锚杆穿过巷道围岩塑性区深入稳定围岩中，提高了锚固效果，最后加装金属网固定。本发明具有节省成本、增强巷道稳定性和能有效保证矿山安全生产的特点，适用于矿山高应力软岩巷道的支护。
The invention relates to a bolt combined support method for a mine high-stress soft rock roadway. The technical solution is: in view of the different bolt stresses at different positions of the high-stress soft rock roadway in the mine, first divide the high-stress soft rock roadway in the mine into 8 different bolt support areas, and then consider that the vertical stress of the roadway is greater than the horizontal stress In the two cases where the horizontal stress is greater than the vertical stress, bolts of different materials and lengths are installed in different bolt support areas. Installing bolts with different materials can give full play to the supporting advantages of various materials. Install bolts with different lengths, and adopt the method of combined support of long bolts and short bolts to make the bolts go deep and stable through the plastic zone of the surrounding rock of the roadway. In the surrounding rock, the anchoring effect is improved, and finally a metal mesh is added to fix it. The invention has the characteristics of saving cost, enhancing the stability of the roadway and effectively ensuring safe production in mines, and is suitable for the support of high-stress soft rock roadways in mines.
Description
Technical field
The invention belongs to the combining anchor support technology fields of mine working.More particularly to a kind of mine high stressed soft rock lane
The combining anchor method for protecting support in road.
Background technique
As mining depth is gradually increased, it is severe that many mine timberings all suffer from highland pressure ring border bring
Challenge.The adjoint high stress environment of larger mining depth causes so that many excavation roadway surrounding rocks enter large deformation soft rock state
It excavates tunnel and shows that deflection is big, deformation velocity is fast and the characteristic of long-time creep in the length of service.High stressed soft rock lane
The characteristic of large deformation occurs for road country rock, increases suspension roof support difficulty, higher anchor pole fracture failure phenomenon occurs.And anchor pole
As the important component in roadway support system, it is broken and fails in case of tunnel regional area anchor pole, then can reduce whole
The stability of a roadway supported by bolt.
Currently, having about the mode of the bolt support in the high stress and soft rock mine roadway of mine: as " it is a kind of be crushed ore-rock for high-sulfur
The patented technology of joint anchor rod support method " (CN103277124A), though efficiently solve corrosion-vulnerable failure, support cost height
The problem of, but the stress characteristic in each suspension roof support region in tunnel is not considered in processing mine high stress and soft rock mine roadway；A kind of " gold
The patented technology of category mine anchor rod support method " (CN101892851A), not for same section in the high stress and soft rock mine roadway of mine
The difference of rockbolt stress feature carries out anchor pole classification in different zones, so that will lead to selected anchor pole can be in tunnel regional area
Easily there is anchor pole fracture failure phenomenon.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide a kind of saving cost, enhancing roadway support stability
With the combining anchor method for protecting support for the mine high stress and soft rock mine roadway that Mine Safety in Production is effectively ensured.
To achieve the above object, the technical solution adopted by the present invention is that: the high stress and soft rock mine roadway be stalk arch lane
Road, the stalk arched tunnel are made of roadway floor AH, the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel arch CDEF.Its
In: the lower end of the A expression left stalk in tunnel；The upper end of the C expression left stalk in tunnel；The lower end of the H expression right stalk in tunnel；F indicates lane
The upper end of the right stalk in road.
Roadway floor AH is made of left section of AJ of roadway floor, roadway floor right section of IH and roadway floor middle section JI, tunnel bottom
The width of left section of AJ of plate is equal with the width of right section of IH of roadway floor, and the width of left section of AJ of roadway floor is 300~1200mm.
Tunnel arch CDEF is made of the left spandrel CD in tunnel, tunnel right spandrel EF and tunnel vault DE；The left spandrel CD in tunnel with
The right spandrel EF in tunnel is symmetrical, and the left spandrel CD in tunnel and the right spandrel EF in tunnel are successively equal to roadway floor in the projection of roadway floor AH
The width of the right section of IH of width and roadway floor of left section of AJ.
The left stalk AC in tunnel is made of the left stalk upper section BC in tunnel and the left stalk lower section AB in tunnel, and the right stalk FH in tunnel is by lane
The right stalk lower section HG composition of the right stalk upper section GF in road and tunnel；The left stalk AC in tunnel and the right stalk FH in tunnel are symmetrical, and tunnel is left straight
The height of wall lower section AB is equal to the height of the right stalk lower section HG in tunnel, and the height of the left stalk lower section AB in tunnel is 300~1200mm.
The stalk arched tunnel is divided into 8 suspension roof support regions, is respectively: the left stalk lower section AB in tunnel and roadway floor
Left section of AJ is suspension roof support region I, and the left stalk upper section BC in tunnel is suspension roof support region II, and the left spandrel CD in tunnel is suspension roof support
Region III, tunnel vault DE are suspension roof support region IV, and the right spandrel EF in tunnel is suspension roof support region V, the right stalk upper section in tunnel
GF is suspension roof support region VI, and right section of IH of the right stalk lower section HG in tunnel and roadway floor is suspension roof support region VII, roadway floor
Middle section JI is suspension roof support region VIII.
When the vertical stress of the mine high stress and soft rock mine roadway is greater than horizontal stress, selected in suspension roof support region I
With the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula, the long anchor pole of glass reinforced plastic is selected in suspension roof support region II, in suspension roof support area
Screw-thread steel Short bolt or pipe seam formula Short bolt are selected in domain III, the long anchor pole of glass reinforced plastic are selected in suspension roof support region IV, in anchor
Screw-thread steel Short bolt or pipe seam formula Short bolt are selected in bar supporting region V, and the long anchor of glass reinforced plastic is selected in suspension roof support region VI
Bar selects the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula in suspension roof support region VII, selects glass in suspension roof support region VIII
Glass steel Short bolt.
When the horizontal stress of the mine high stress and soft rock mine roadway is greater than vertical stress, selected in suspension roof support region I
With the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula, glass reinforced plastic Short bolt is selected in suspension roof support region II, in suspension roof support area
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in domain III, glass reinforced plastic Short bolt are selected in suspension roof support region IV, in anchor
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in bar supporting region V, and the short anchor of glass reinforced plastic is selected in suspension roof support region VI
Bar selects the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula in suspension roof support region VII, selects glass in suspension roof support region VIII
Glass steel Short bolt；
The mounting means of anchor pole are as follows: bore corresponding anchor respectively according to different anchor poles selected by different suspension roof support regions
Rod aperture in the corresponding bolthole injection cement mortar or Anchor Agent, then installs selected anchor pole；Then by metal net laying
It is located in the wall for the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel the arch CDEF for having installed anchor pole, finally by metal mesh
The anchor pole covered is fixed with metal mesh.
The high stress and soft rock mine roadway is that the maximum principal stress of roadway surrounding rock is greater than the uniaxial compressive of 20MPa and roadway surrounding rock
Intensity is less than the tunnel of 30MPa.
The diameter of the long anchor pole of screw-thread steel is 15~25mm, and length is 2500~8000mm；Screw-thread steel Short bolt it is straight
Diameter is 15~25mm, and length is 1000~2500mm；The diameter of the long anchor pole of pipe seam formula be 30~45mm, length be 2500~
8000mm；The diameter of pipe seam formula Short bolt is 30~45mm, and length is 1000~2500mm；The diameter of the long anchor pole of glass reinforced plastic is 15
~25mm, length are 2500~8000mm；The diameter of glass reinforced plastic Short bolt is 15~25mm, and length is 2500~8000mm.
The metal mesh uses diameter to weave for the iron wire of 5~10mm, the size of mesh opening of metal mesh be (100~
150mm) × (100~150mm).
Due to the adoption of the above technical scheme, the present invention has the positive effect that compared with prior art:
The present invention is directed to the difference of rockbolt stress feature at mine high stress and soft rock mine roadway different location, first that high stress is soft
Rock gangway road is divided into 8 different suspension roof support regions, then is greater than horizontal stress and horizontal stress for the vertical stress in tunnel
Greater than two kinds of situations of vertical stress, the material anchor pole different with length is installed in different suspension roof support regions respectively, from
And improve the stability of high stress and soft rock mine roadway suspension roof support body.The different anchor pole energy of installation material in different suspension roof support regions
The supporting advantage for giving full play to various types of materials, the different anchor pole of installation length in different suspension roof support regions, with long anchor
The method for protecting support of bar and Short bolt combined supporting can not only save cost, and anchor pole can also be made to pass through roadway surrounding rock plastic zone
Go deep into stabilizing surrounding rock, improve anchoring effect, to improve the stability of high stress and soft rock mine roadway suspension roof support body.
So the present invention has the characteristics that save cost, enhancing Drift stability and Mine Safety in Production can be effectively ensured,
Supporting suitable for mine high stress and soft rock mine roadway.
Detailed description of the invention
Fig. 1 is a kind of suspension roof support subregion schematic diagram of high stress and soft rock mine roadway section of the invention；
Fig. 2 is combined supporting schematic diagram of the suspension roof support subregion shown in Fig. 1 when vertical stress is greater than horizontal stress；
Fig. 3 is combined supporting schematic diagram of the suspension roof support subregion shown in Fig. 1 when horizontal stress is greater than vertical stress.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description, not to the limit of its protection scope
System.
In present embodiment: the high stress and soft rock mine roadway be roadway surrounding rock maximum principal stress be greater than 20MPa and
The uniaxial compressive strength of roadway surrounding rock is less than the tunnel of 30MPa.It is repeated no more in embodiment.
Embodiment 1
A kind of combining anchor method for protecting support of mine high stress and soft rock mine roadway.As shown in Figure 1, the high stress and soft rock mine roadway
For stalk arched tunnel, the stalk arched tunnel is encircleed by roadway floor AH, the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel
CDEF composition.Wherein: the lower end of the A expression left stalk in tunnel；The upper end of the C expression left stalk in tunnel；H is indicated under the right stalk in tunnel
End；The upper end of the F expression right stalk in tunnel.
As shown in Figure 1, roadway floor AH is by left section of AJ of roadway floor, right section of IH of roadway floor and roadway floor middle section JI group
At；The width of left section of AJ of roadway floor is equal with the width of right section of IH of roadway floor, and the width of left section of AJ of roadway floor is 300~
1200mm。
As shown in Figure 1, tunnel arch CDEF is made of the left spandrel CD in tunnel, tunnel right spandrel EF and tunnel vault DE；Tunnel
Left spandrel CD and the right spandrel EF in tunnel are symmetrical, the left spandrel CD in tunnel and the right spandrel EF in tunnel roadway floor AH projection successively etc.
In the width of the right section of IH of width and roadway floor of left section of AJ of roadway floor.
As shown in Figure 1, the left stalk AC in tunnel is made of the left stalk upper section BC in tunnel and the left stalk lower section AB in tunnel, tunnel is right
Stalk FH is made of the right stalk upper section GF in tunnel and the right stalk lower section HG in tunnel；FH pairs of the left stalk AC in tunnel and the right stalk in tunnel
Claim, the height of the left stalk lower section AB in tunnel is equal to the height of the right stalk lower section HG in tunnel, and the height of the left stalk lower section AB in tunnel is
300~1200mm.
As shown in Figure 1, the stalk arched tunnel is divided into 8 suspension roof support regions, it is respectively: the left stalk lower section AB in tunnel
It is suspension roof support region I with left section of AJ of roadway floor, the left stalk upper section BC in tunnel is suspension roof support region II, the left spandrel CD in tunnel
For suspension roof support region III, tunnel vault DE is suspension roof support region IV, and the right spandrel EF in tunnel is suspension roof support region V, tunnel
Right stalk upper section GF is suspension roof support region VI, and right section of IH of the right stalk lower section HG in tunnel and roadway floor is suspension roof support region
VII, roadway floor middle section JI are suspension roof support region VIII.
As shown in Fig. 2, the vertical stress of mine high stress and soft rock mine roadway described in the present embodiment is greater than horizontal stress, in anchor pole
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in supporting region I, and the long anchor pole of glass reinforced plastic is selected in suspension roof support region II,
Screw-thread steel Short bolt or pipe seam formula Short bolt are selected in suspension roof support region III, select glass reinforced plastic in suspension roof support region IV
Long anchor pole is selected screw-thread steel Short bolt or pipe seam formula Short bolt in suspension roof support region V, is selected in suspension roof support region VI
With the long anchor pole of glass reinforced plastic, the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in suspension roof support region VII, in suspension roof support area
Glass reinforced plastic Short bolt is selected in domain VIII.
The mounting means of anchor pole are as follows: bore corresponding anchor respectively according to different anchor poles selected by different suspension roof support regions
Rod aperture injects cement mortar in the corresponding bolthole, then installs selected anchor pole；Then metal mesh is laid on and has been pacified
It fills on the left stalk AC in tunnel, the right stalk FH in tunnel of anchor pole and the wall of tunnel arch CDEF, is finally covered metal mesh
Anchor pole is fixed with metal mesh.
The diameter of the long anchor pole of screw-thread steel is 15~20mm, and length is 2500~5000mm；Screw-thread steel Short bolt it is straight
Diameter is 15~20mm, and length is 1000~2000mm；The diameter of the long anchor pole of pipe seam formula be 30~40mm, length be 2500~
5000mm；The diameter of pipe seam formula Short bolt is 30~40mm, and length is 1000~2000mm；The diameter of the long anchor pole of glass reinforced plastic is 15
~20mm, length are 2500~5000mm；The diameter of glass reinforced plastic Short bolt is 15~20mm, and length is 2500~5000mm.
The metal mesh uses diameter to weave for the iron wire of 5~8mm, and the size of mesh opening of metal mesh is (100~130mm)
× (100~130mm).
Embodiment 2
A kind of combining anchor method for protecting support of mine high stress and soft rock mine roadway.As shown in Figure 1, the high stress and soft rock mine roadway
For stalk arched tunnel, the stalk arched tunnel is encircleed by roadway floor AH, the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel
CDEF composition.Wherein: the lower end of the A expression left stalk in tunnel；The upper end of the C expression left stalk in tunnel；H is indicated under the right stalk in tunnel
End；The upper end of the F expression right stalk in tunnel.
As shown in Figure 1, roadway floor AH is by left section of AJ of roadway floor, right section of IH of roadway floor and roadway floor middle section JI group
At, the width of left section of AJ of roadway floor is equal with the width of right section of IH of roadway floor, and the width of left section of AJ of roadway floor is 300~
1200mm。
As shown in Figure 1, tunnel arch CDEF is made of the left spandrel CD in tunnel, tunnel right spandrel EF and tunnel vault DE；Tunnel
Left spandrel CD and the right spandrel EF in tunnel are symmetrical, the left spandrel CD in tunnel and the right spandrel EF in tunnel roadway floor AH projection successively etc.
In the width of the right section of IH of width and roadway floor of left section of AJ of roadway floor.
As shown in Figure 1, the left stalk AC in tunnel is made of the left stalk upper section BC in tunnel and the left stalk lower section AB in tunnel, tunnel is right
Stalk FH is made of the right stalk upper section GF in tunnel and the right stalk lower section HG in tunnel；FH pairs of the left stalk AC in tunnel and the right stalk in tunnel
Claim, the height of the left stalk lower section AB in tunnel is equal to the height of the right stalk lower section HG in tunnel, and the height of the left stalk lower section AB in tunnel is
300~1200mm.
As shown in Figure 1, the stalk arched tunnel is divided into 8 suspension roof support regions, it is respectively: the left stalk lower section AB in tunnel
It is suspension roof support region I with left section of AJ of roadway floor, the left stalk upper section BC in tunnel is suspension roof support region II, the left spandrel CD in tunnel
For suspension roof support region III, tunnel vault DE is suspension roof support region IV, and the right spandrel EF in tunnel is suspension roof support region V, tunnel
Right stalk upper section GF is suspension roof support region VI, and right section of IH of the right stalk lower section HG in tunnel and roadway floor is suspension roof support region
VII, roadway floor middle section JI are suspension roof support region VIII.
As shown in figure 3, the horizontal stress of mine high stress and soft rock mine roadway described in the present embodiment is greater than vertical stress, in anchor pole
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in supporting region I, and glass reinforced plastic Short bolt is selected in suspension roof support region II,
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in suspension roof support region III, select glass reinforced plastic in suspension roof support region IV
Short bolt is selected the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula in suspension roof support region V, is selected in suspension roof support region VI
With glass reinforced plastic Short bolt, the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in suspension roof support region VII, in suspension roof support area
Glass reinforced plastic Short bolt is selected in domain VIII.
The mounting means of anchor pole are as follows: bore corresponding anchor respectively according to different anchor poles selected by different suspension roof support regions
Rod aperture injects Anchor Agent in the corresponding bolthole, then installs selected anchor pole；Then metal mesh is laid on and has been installed
The left stalk AC in the tunnel of anchor pole, the right stalk FH in tunnel and tunnel are encircleed in the wall of CDEF, the anchor for finally being covered metal mesh
Bar is fixed with metal mesh.
The diameter of the long anchor pole of screw-thread steel is 20~25mm, and length is 5000~8000mm；Screw-thread steel Short bolt it is straight
Diameter is 20~25mm, and length is 1500~2500mm；The diameter of the long anchor pole of pipe seam formula be 35~45mm, length be 5000~
8000mm；The diameter of pipe seam formula Short bolt is 35~45mm, and length is 1500~2500mm；The diameter of the long anchor pole of glass reinforced plastic is 20
~25mm, length are 5000~8000mm；The diameter of glass reinforced plastic Short bolt is 20~25mm, and length is 5000~8000mm.
The metal mesh uses diameter to weave for the iron wire of 7~10mm, the size of mesh opening of metal mesh be (120~
150mm) × (120~150mm).
Present embodiment has the positive effect that compared with prior art:
Present embodiment first will for the difference of rockbolt stress feature at mine high stress and soft rock mine roadway different location
High stress and soft rock mine roadway is divided into 8 different suspension roof support regions, then for tunnel vertical stress be greater than horizontal stress and
Horizontal stress is greater than two kinds of situations of vertical stress, and it is different with length to install material in different suspension roof support regions respectively
Anchor pole, to improve the stability of high stress and soft rock mine roadway suspension roof support body.In different suspension roof support regions, installation material is different
Anchor pole can give full play to the supporting advantage of various types of materials, the different anchor pole of installation length in different suspension roof support regions,
With the method for protecting support of long anchor pole and Short bolt combined supporting, cost can be not only saved, anchor pole can also be made to enclose across tunnel
Rock plastic zone is goed deep into stabilizing surrounding rock, and anchoring effect is improved, to improve the stabilization of high stress and soft rock mine roadway suspension roof support body
Property.
Cost is saved, Drift stability is enhanced and mine safety life can be effectively ensured so present embodiment has
The characteristics of production, the supporting suitable for mine high stress and soft rock mine roadway.
Claims (4)
1. a kind of combining anchor method for protecting support of mine high stress and soft rock mine roadway, it is characterised in that: the high stress and soft rock mine roadway
For stalk arched tunnel, the stalk arched tunnel is encircleed by roadway floor AH, the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel
CDEF composition；Wherein: A indicates the lower end of the left stalk in tunnel, and C indicates the upper end of the left stalk in tunnel, and H is indicated under the right stalk in tunnel
End, F indicate the upper end of the right stalk in tunnel；
Roadway floor AH is made of left section of AJ of roadway floor, roadway floor right section of IH and roadway floor middle section JI, and roadway floor is left
The width of section AJ is equal with the width of right section of IH of roadway floor, and the width of left section of AJ of roadway floor is 300~1200mm；
Tunnel arch CDEF is made of the left spandrel CD in tunnel, tunnel right spandrel EF and tunnel vault DE；The left spandrel CD in tunnel and tunnel
Right spandrel EF is symmetrical, and the projection of the left spandrel CD in tunnel and the right spandrel EF in tunnel in roadway floor AH is successively equal to left section of roadway floor
The width of the right section of IH of width and roadway floor of AJ；
The left stalk AC in tunnel is made of the left stalk upper section BC in tunnel and the left stalk lower section AB in tunnel, and the right stalk FH in tunnel is by the tunnel right side
The right stalk lower section HG composition of stalk upper section GF and tunnel；The left stalk AC in tunnel and the right stalk FH in tunnel are symmetrical, under the left stalk in tunnel
The height of section AB is equal to the height of the right stalk lower section HG in tunnel, and the height of the left stalk lower section AB in tunnel is 300~1200mm；
The stalk arched tunnel is divided into 8 suspension roof support regions, is respectively: the left stalk lower section AB in tunnel and left section of roadway floor
AJ is suspension roof support region I, and the left stalk upper section BC in tunnel is suspension roof support region II, and the left spandrel CD in tunnel is suspension roof support region
III, tunnel vault DE are suspension roof support region IV, and the right spandrel EF in tunnel is suspension roof support region V, and the right stalk upper section GF in tunnel is
Suspension roof support region VI, right section of IH of the right stalk lower section HG in tunnel and roadway floor are suspension roof support region VII, roadway floor middle section
JI is suspension roof support region VIII；
When the vertical stress of the mine high stress and soft rock mine roadway is greater than horizontal stress, spiral shell is selected in suspension roof support region I
The long anchor pole of line steel or the long anchor pole of pipe seam formula select the long anchor pole of glass reinforced plastic, in suspension roof support region III in suspension roof support region II
Middle selection screw-thread steel Short bolt or pipe seam formula Short bolt select the long anchor pole of glass reinforced plastic, in anchor pole branch in suspension roof support region IV
It protects and selects screw-thread steel Short bolt or pipe seam formula Short bolt in region V, the long anchor pole of glass reinforced plastic is selected in suspension roof support region VI,
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in suspension roof support region VII, select glass reinforced plastic in suspension roof support region VIII
Short bolt；
When the horizontal stress of the mine high stress and soft rock mine roadway is greater than vertical stress, spiral shell is selected in suspension roof support region I
The long anchor pole of line steel or the long anchor pole of pipe seam formula select glass reinforced plastic Short bolt, in suspension roof support region III in suspension roof support region II
The long anchor pole of middle selection screw-thread steel or the long anchor pole of pipe seam formula, select glass reinforced plastic Short bolt, in anchor pole branch in suspension roof support region IV
It protects in region V and selects the long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula, glass reinforced plastic Short bolt is selected in suspension roof support region VI,
The long anchor pole of screw-thread steel or the long anchor pole of pipe seam formula are selected in suspension roof support region VII, select glass reinforced plastic in suspension roof support region VIII
Short bolt；
The mounting means of anchor pole are as follows: bore corresponding anchor pole respectively according to different anchor poles selected by different suspension roof support regions
Selected anchor pole in the corresponding bolthole injection cement mortar or Anchor Agent, then is installed in hole；Then metal mesh is laid with
In the wall for the left stalk AC in tunnel, the right stalk FH in tunnel and tunnel the arch CDEF for having installed anchor pole, finally by metal mesh institute
The anchor pole of covering is fixed with metal mesh.
2. the combining anchor method for protecting support of high stress and soft rock mine roadway according to claim 1, it is characterised in that the height is answered
Power soft-rock tunnel is that the maximum principal stress of roadway surrounding rock is greater than 20MPa and the uniaxial compressive strength of roadway surrounding rock is less than 30MPa
Tunnel.
3. the combining anchor method for protecting support of high stress and soft rock mine roadway according to claim 1, it is characterised in that the screw thread
The diameter of the long anchor pole of steel is 15~25mm, and length is 2500~8000mm；The diameter of screw-thread steel Short bolt is 15~25mm, length
For 1000~2500mm；The diameter of the long anchor pole of pipe seam formula is 30~45mm, and length is 2500~8000mm；Pipe seam formula Short bolt
Diameter is 30~45mm, and length is 1000~2500mm；The diameter of the long anchor pole of glass reinforced plastic be 15~25mm, length be 2500~
8000mm；The diameter of glass reinforced plastic Short bolt is 15~25mm, and length is 2500~8000mm.
4. the combining anchor method for protecting support of high stress and soft rock mine roadway according to claim 1, it is characterised in that the gold
Belonging to net uses diameter to weave for the iron wire of 5~10mm, and the size of mesh opening of metal mesh is (100~150mm) × (100~150mm).
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| CN110219686A (en) * | 2019-07-12 | 2019-09-10 | 中铁十二局集团有限公司 | Soft rock tunnel large deformation section arch wall handles the construction method of long anchor pole |
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| CN109057818B (en) | 2020-01-24 |
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