CN109184692A - A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam - Google Patents
A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam Download PDFInfo
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- CN109184692A CN109184692A CN201811345944.7A CN201811345944A CN109184692A CN 109184692 A CN109184692 A CN 109184692A CN 201811345944 A CN201811345944 A CN 201811345944A CN 109184692 A CN109184692 A CN 109184692A
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- 239000003245 coal Substances 0.000 title claims abstract description 90
- 238000005065 mining Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 230000006872 improvement Effects 0.000 abstract description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 10
- 230000032258 transport Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
- E21C29/22—Propulsion of machines for slitting or completely freeing the mineral from the seam by wheels, endless tracks or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明涉及急倾斜煤层临界伪斜角综合机械化开采方法，包括以下步骤：1)煤层倾角α≥55°时,临界伪斜角的确定为45°；2)临界伪倾斜工作面的布置：回风巷道端头超前运输巷道端头的距离与伪俯斜工作面真倾斜方向的长度l相等，形成伪俯斜工作面与煤层走向方向呈45°布置；3)在伪俯斜工作面布置工作面支护装置及采煤设备，进行综合机械化开采。本发明解决了开采设备的倒滑及煤壁片帮问题本发明是针对现行急倾斜煤层长壁综合机械化开采的工作面伪斜布置方式及工作面设备的弊端进行的改进。
The invention relates to a comprehensive mechanized mining method for a critical pseudo-inclined angle of a steeply inclined coal seam, comprising the following steps: 1) when the inclination angle α of the coal seam is greater than or equal to 55°, the critical pseudo-inclined angle is determined to be 45°; 2) the arrangement of the critical pseudo-inclined working face: back to The distance from the end of the wind tunnel ahead of the end of the transport tunnel is equal to the length l of the true inclination direction of the pseudo-depression working face, forming a 45° arrangement between the pseudo-depression working face and the direction of the coal seam strike; 3) Layout work on the pseudo-depression working face Surface support device and coal mining equipment for comprehensive mechanized mining. The invention solves the problems of backslip of mining equipment and coal wall slats. The invention is an improvement for the current pseudo-inclined arrangement of working face and the drawbacks of working face equipment for comprehensive mechanized mining of long walls in steeply inclined coal seams.
Description
Technical field
The present invention is specific to technical field of coal exploitation, and in particular to a kind of critical pseudo- angle recovery method of half-edge coal seam.
Background technique
The pseudo- tiltedly arrangement of steeply pitching seam coal working face, can be changed steeply pitching seam is " slow oblique " or " inclination " working face mining, is mentioned
The self-stability energy of height working face supporting and winning apparatus improves operating environment, improves working face efficiency and safety benefit.
The pseudo- tiltedly arrangement of working face, is one of common method of steeply-inclined seam mining, its advantage is that the pseudo- tiltedly arrangement of working face
Working face inclination angle can be slowed down, be conducive to working face equipment anti-skid.Pseudo- tiltedly arrangement is divided into puppet and faces upward tiltedly arrangement (air inlet end is super
Preceding return air end) and puppet bow tiltedly arrangement two kinds of (entering the wind end in advance in return air end), wherein puppet tiltedly arrangement of bowing is particularly conducive to prevent
Only coal wall caving.Under normal circumstances, working face puppet bow rake angle be 3 ° -5 °, working face arrangement bracket, coalcutter and scraper plate it is defeated
Machine is sent to be all made of the conventional equipment with anti-skid function.Up to now, only has Sichuan Guang Neng group plum a strip of land between hills coal both at home and abroad
Mine is reequiped the top beam of conventional hydraulic support, and the working face puppet that repacking after-poppet adapts to bows oblique angle maximum up to 12 °,
Chongqing Song Zao group meets spring ore mining so that working face puppet oblique angle of bowing has been reached 17 °, but coal seam with the shaped hydraulic bracket specially designed
Thickness only has 1.3m.
But when seam inclination is greater than 55 ° and coal seam thickness is greater than 2.0m, if still using working face tendency arrangement trend
The longwall mining method of propulsion, existing lesser pseudo- rake angle just can not effectively solve working face equipment back skating and coal wall caving etc.
Safety in production problem.
Summary of the invention
Existing inclination angle is tiltedly arranged greater than the half-edge coal seam of 2.0m using traditional working face is pseudo- greater than 55 °, coal seam thickness
When mode is exploited, the back skating of winning apparatus and coal wall caving problem not can effectively solve, in order to solve the technical problem, this
Invention provides a kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam and equipment, and the present invention be directed to existing urgency to incline
The improvement that the drawbacks of pseudo- tiltedly arrangement of the working face of oblique coal seam longwell fully-mechanized mining and working face equipment carries out.
Technical solution of the invention are as follows:
A kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam, is characterized in that including following step
It is rapid:
1) when seam inclination α >=55 °, the determination at critical puppet oblique angle
Space geometry relationship between seam inclination α and puppet oblique angle γ are as follows:
l1Sin β=l1cosγ·sinα (1)
Wherein l1For working face puppet tilt length, β is the true dip angle of pseudo- slanting face of bowing；
Guarantee that the coal that coalcutter is cut off slips certainly, then the true dip angle β of pseudo- slanting face of bowing should meet
β > sin35 °=0.574 sin (2)
The natural repose angle of loose coal is 35 °:
(1) is substituted into (2) to obtain:
cosγ·sin55°>0.574 (3)
It solves: when γ >=45 °, it is thus determined that the size at critical puppet oblique angle is 45 °；
2) arrangement of critical pseudo- inclined cut:
Return aircourse and haulage drift, the advanced haulage drift end in return aircourse end are tunneled respectively along seam inclination direction
Then head will hole-through to form puppet and bow slanting face between return aircourse end and haulage drift end, guarantee return aircourse end
The distance of advanced haulage drift end is equal with the pseudo- length l in slanting face true dip direction that bows, formed puppet bow slanting face and
Bearing direction is in 45 ° of arrangements；
3) it bows slanting face arrangement face timbering device and coal excavation apparatus in puppet, carries out fully-mechanized mining.
Further, the face timbering device includes top beam, pedestal, guided way and push rod, and coalcutter is along guiding
Rail walking, the guided way are fixed on the base by push rod, and the pseudo- tilted direction of the base bottom and pseudo- slanting face of bowing is flat
Coal channel is slipped in row, the bottom plate free space formation between pedestal and coal wall.
Further, the guided way and puppet slanting face puppet tilted direction of bowing are parallel.
Further, the face timbering device further includes the cantilever directional wheel being arranged on coalcutter, and setting
Suspention guided way on top beam, the cantilever directional wheel are adapted with suspention guided way.
Further, the pedestal is in 45 ° of angles close to the side of coal wall and haulage drift.
Further, cantilever directional wheel is telescopic.
Further, step 3) specifically: in exploitation process, coalcutter is along guided way walking coal cutting, while cantilever orients
Edge slips coal channel from slipping to transport end to broken coal body of the wheel under suspention guided way walking, coalcutter cutting under the effect of gravity
And it transports.
The invention has the benefit that
1) present invention improves at the pseudo- oblique angle of high-dipping pseudo discrete state model to 45 ° by maximum 17 ° at present, is greatly reduced
The true dip angle of such working face, can effectively prevent the back skating of working equipment, while pseudo discrete state model can effectively prevent coal wall piece
Side.
2) the present invention provides a kind of suspension device for the critical pseudo- oblique angle exploitation of half-edge coal seam, by by top beam with
Pedestal is adjusted to irregular parallelogram, realizes the good fit of top beam and coal wall, solves conventional stent pseudo- oblique
Sky top area big problem in end face present in recovery process.
3) present invention eliminates middle part chutes, but still realize the gravity haulage of broken coal body, fundamentally solve
The problem of pseudo discrete state model pushing and sliding difficulty, while having saved the energy consumption of mining face equipment expense and winning apparatus.
4) method that the present invention is combined using coalcutter walking track with set cap suspention guided way, realizes coal mining
Steady safety walking of the machine in working face.
Detailed description of the invention
The critical pseudo- oblique angle exploitation working face arrangement signal of Fig. 1 half-edge coal seam；
Fig. 2 face timbering and Mining Equipment signal；
In figure, 1- coalcutter walking guided way, 2- walking guided way push rod 3- coalcutter suspention guided way 4- coalcutter hangs
Hang guide pulley mechanism, 5- coalcutter, 6- pedestal, 7- top beam, 8- hydraulic cylinder, 9- stretches mandril.
Specific embodiment
Embodiment 1: a kind of critical pseudo- oblique angle comprehensive mechanical mining method of half-edge coal seam,
1) critical pseudo- inclination angle working face arrangement
1.1) working face across strike is arranged, across pitch promotes, and the crossover distance of return air end is equal to working face in true dip
The projected length in direction, i.e. puppet bow rake angle as 45 ° (being defined as critical pseudo- oblique angle)；
1.2) when seam inclination is greater than 55 °, working face puppet oblique angle design of bowing should meet: guarantee that working face slips coal channel and inclines
Angle is greater than the natural repose angle (natural repose angle of granular media coal is 35 °) of loose coal, and the coal body of coal mining crusher machine can slip certainly
To transport end, therefore the conveyer of chute in the middle part of working face can be cancelled.It is computed, it is pseudo- oblique when seam inclination is greater than 55 °
As long as angle perseverance, which is greater than 45 °, can guarantee that break up coal bodies edge slips coal channel and slips certainly.
2) in the arrangement suspension device and coalcutter for coal working face
2.1) face timbering device includes top beam, pedestal, guided way and push rod, and coalcutter is walked along guided way, institute
It states guided way to be fixed on the base by push rod, base bottom is parallel with the pseudo- pseudo- tilted direction of slanting face of bowing, base bottom shape
At slipping coal channel.In order to ensure what the puppet of 55 ° or more half-edge coal seams bowed slanting face slips coal channel inclination angle greater than granular media coal
35 ° of natural repose angle, the critical pseudo- oblique angle size of working face should be set as 45 °, i.e. the crossover distance of return air end is equal to work
Projected length of the face in true dip direction.The top beam and pedestal of force piece are abnormity by rectangle improvement, close to coal wall one
The bevel edge and haulage drift of side are in 45 ° of angles；In order to keep set cap and pedestal parallel with coal wall, do not generated in end face
Big non-support gap, transform set cap and pedestal as abnormal shape by traditional rectangle, i.e. set cap and pedestal is close
The bevel edge and haulage drift of coal wall side are in 45 ° of angles；2.2) bracket base passes through push rod and dedicated coalcutter walking track
It is connected, walking track is parallel with working face puppet tilted direction；
2.3) in order to guarantee not slide down in coalcutter walking process, set cap is equipped with suspention guided way, is arranged and is adopting
Cantilever directional wheel and suspention Slidway lap on coal machine, guarantee the stability of coalcutter.
3) coalcutter by working face upper end chamfer feed, coalcutter along walking the coal cutting of track uplink, single rack successively sequence
Formula moves frame, immediate support, and broken coal body is slipped certainly to transport end under the effect of gravity and transported.It is loose due to coal mining crusher machine
Coal body may be implemented from slipping, therefore can cancel chute in the middle part of working face, and it is tired fundamentally to solve puppet slanting face pushing and sliding of bowing
Difficult problem；Cancelling in the middle part of working face after chute, for the walk problem for solving coalcutter, the dedicated walking rail of coalcutter is set
Road is connected by push rod with bracket base, and coalcutter can walk on walking track along the direction parallel with coal wall.
Embodiment 2: as shown in Fig. 1 (a), critical puppet bow oblique angle working face arrangement: tunnel air return lane respectively along bearing
The distance of road and haulage drift, the advanced haulage drift end in return aircourse end is equal with the length l in working face true dip direction,
Hole-through open-off cut between tailentry road end and haulage drift end, the puppet of formation is bowed slanting face and bearing side
To in 45 ° of angles (critical puppet oblique angle).Pseudo- slanting face true dip angle is greater than 35 ° of natural repose angle of broken bastard coal, coal mining machine cut
Under broken coal body can be realized along floor undulation from slipping, transported without drag conveyor, therefore drag conveyor can be cancelled,
Entire working face section is substantially formed one and slips coal channel.
Embodiment 3: as shown in Fig. 1 (b), puppet bow slanting face true dip angle β and seam inclination α and critical puppet oblique angle γ it
Between space geometry relationship are as follows:
l1Sin β=l1cosγ·sinα (1)
When seam inclination α is 55 °, it is ensured that the coal that coalcutter is cut off can slip certainly, then the true of pseudo- slanting face of bowing inclines
Angle should be greater than 35 ° (natural repose angles of loose coal), it may be assumed that
β > sin35 °=0.574 sin (2)
(1) is substituted into (2) to obtain:
cosγ·sin55°>0.574 (3)
Solve: when γ=45 ° and α >=55 °, the true dip angle β perseverance of working face is greater than 35 °, it is thus determined that critical pseudo- oblique
The size at angle is 45 °.
In exploitation process, coalcutter is along guided way walking coal cutting, while cantilever directional wheel is mined along suspention guided way walking
Broken coal body under machine cutting is under the effect of gravity along slipping coal channel from slipping to transport end and transport.
Embodiment 4: as shown in Figure 2 a, face timbering and coal excavation apparatus: bracket is special-shaped hydraulic support, top beam and pedestal
Bevel edge and haulage drift close to coal wall side are in 45 ° of angles；Hydraulic support foundation passes through walking guided way push rod 2 and coalcutter
Walking guided way 1 is connected, and coalcutter 5, which is ridden, to be seated on coalcutter walking guided way 1, and walk back and forth coal cutting.
Embodiment 5: it is further, as shown in Figure 2 b, since the stability of coalcutter is difficult to through single walking track
It is controlled, therefore suspention guided way, then the orientation of the telescopic boom by installing on coalcutter is set in set cap lower part
Wheel and suspention guided way overlap joint, guarantee the stability of coalcutter.In order to guarantee the stability of coalcutter in the process of walking without
To sliding down, coalcutter suspention leading block 4 is each side set at the coalcutter back side, and adopting on the downside of set cap is set
Coal machine suspends guided way overlap joint 3 in midair, plays the walking of coalcutter auxiliary and guiding role.
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Cited By (5)
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| CN112483091A (en) * | 2020-12-30 | 2021-03-12 | 中国矿业大学(北京) | Mining system and mining method for steeply inclined coal seam mining area pseudo-dip-inclined arrangement |
| CN112682082A (en) * | 2021-01-26 | 2021-04-20 | 西安科技大学 | Mechanized mining system and method for flexible shield support of steep coal seam |
| CN112855156A (en) * | 2021-01-12 | 2021-05-28 | 西安科技大学 | Steeply inclined coal seam special-shaped support strike long-wall depression pseudo-inclined working face comprehensive mechanical coal mining equipment and coal mining method using same |
| CN114483030A (en) * | 2022-01-14 | 2022-05-13 | 西安科技大学 | Planing and transporting equipment for mining steep inclined thin and medium coal seam |
| CN114483031A (en) * | 2022-01-14 | 2022-05-13 | 西安科技大学 | A mining equipment suitable for mechanized mining of steeply inclined thin and medium-thick coal seams |
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| CN112855156A (en) * | 2021-01-12 | 2021-05-28 | 西安科技大学 | Steeply inclined coal seam special-shaped support strike long-wall depression pseudo-inclined working face comprehensive mechanical coal mining equipment and coal mining method using same |
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| CN112682082A (en) * | 2021-01-26 | 2021-04-20 | 西安科技大学 | Mechanized mining system and method for flexible shield support of steep coal seam |
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| CN114483030A (en) * | 2022-01-14 | 2022-05-13 | 西安科技大学 | Planing and transporting equipment for mining steep inclined thin and medium coal seam |
| CN114483031A (en) * | 2022-01-14 | 2022-05-13 | 西安科技大学 | A mining equipment suitable for mechanized mining of steeply inclined thin and medium-thick coal seams |
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