CN104265292B - The layering of a kind of solid filling coal-face retains false roof method - Google Patents

The layering of a kind of solid filling coal-face retains false roof method Download PDF

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Publication number
CN104265292B
CN104265292B CN201410483835.7A CN201410483835A CN104265292B CN 104265292 B CN104265292 B CN 104265292B CN 201410483835 A CN201410483835 A CN 201410483835A CN 104265292 B CN104265292 B CN 104265292B
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China
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false roof
roof
layering
false
coal
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CN201410483835.7A
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Chinese (zh)
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CN104265292A (en
Inventor
周楠
武浩
张吉雄
郭帅
朱同功
郝德永
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中国矿业大学
平顶山天安煤业股份有限公司
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Publication of CN104265292A publication Critical patent/CN104265292A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling

Abstract

A kind of solid filling coal-face layering disclosed by the invention retains false roof method, comprise the following steps: before (one) retains false roof, strengthening supporting is carried out to top board, (2) according to the lithology of false roof, thickness and inbreak situation, layering is carried out to false roof, (3) first layer false roof fringe region is reinforced, (4) support is progressively adjusted to below first layer false roof, and supporting is carried out to first layer false roof, (5) after face stabilizer, continue adjusting pole, complete the reservation of other layering false roof.Retain in false roof process in whole layering, ensure the filling quality in goaf, goaf is full of substantial.This method is reliably simple and safe, work plane can be made to be transitioned into by adopting false roof mining phase the normal phase staying false roof to exploit rapidly, raw coal percentage of shale content can be reduced simultaneously, improving the recovery ratio of coal resources, providing a kind of effective, economical and practical technical scheme for staying false roof exploitation under China's conditions of similarity.

Description

The layering of a kind of solid filling coal-face retains false roof method
Technical field
The present invention relates to a kind of colliery and retain false roof method, especially a kind of solid filling coal-face that is applicable to stays the layering of false roof exploitation transition stage to stay false roof coal-mining method by adopting false roof exploitation.
Background technology
False roof is the weak stratum between coal seam and immediate roof, with adopting with falling, grows unstable in ature of coal stratum.There is the coal-face of One's name is legion in progradation in China, due to the change of condition of coal seam occurrence, false roof is grown, and makes to face during working face mining to adopt false roof and to keep on file the problem of coal.Adopt false roof coal of keeping on file and not only can reduce coal mining rate, affect ature of coal, strengthen raw coal percentage of shale content and working face equipment wearing and tearing, underground transportation and ground washing burden can be increased simultaneously.
Current China mine generally adopts looks for the mode on collet top to solve this technical barrier.Exploit compared to traditional caving method, solid filling is exploited because obturation provides effective support to goaf overlying rock, Face Ground Pressure Behavior is not obvious, and false roof relatively easily controls, and therefore more easily realizes adopting false roof and keeps coal on file to the transition retaining false roof exploitation.
Summary of the invention
Technical problem: the object of the invention is for problems of the prior art, a kind of solid filling coal-face layering is provided to retain false roof method, to solve the problem because work plane causes because geological conditions change runs into thicker unstable false roof, realize work plane by exploiting false roof to the transition safely and fast staying false roof to exploit.
Technical scheme: solid filling coal-face layering of the present invention retains false roof method, work plane mine and goaf filling process in, solid filling coal-face is in the transition stage of adopting false roof exploitation and staying false roof to exploit, false roof is retained by " top is stayed in layering; progressively strengthen ", false roof is divided into n layer, adopts each mode retaining one deck layering false roof to be remained by whole false roof.
The process that described " top is stayed in layering, progressively strengthens " retains false roof is as follows:
A. before retaining false roof, after work plane coal cutting is complete, adopt along the advance of the face direction mode of conventional " anchor pole a+ anchor cable+wire lath+steel bar ladder beam a " combined supporting to hang to the whole work plane in support front the top board exposed and carry out strengthening supporting, strengthening supporting parameter is determined according to according to work plane actual conditions, ensures goaf filling quality by designing requirement simultaneously;
B. after top board strengthening supporting completes, carry out layering to whole false roof, according to the inbreak situation of the lithology of false roof, false roof thickness h and false roof, false roof is divided into n layer, the thickness of each layering false roof is h/n;
C. first retain first layer false roof, before first layer false roof retains, under support shielding, adopt " anchor pole b+ wire lath+steel bar ladder beam b " combined supporting mode, the fringe region of first layer false roof is reinforced;
D., after first layer roof solidified completes, by coal-winning machine coal cutting height reduction to the one-tenth-value thickness 1/10 of first layer false roof, after adjustment coal-winning machine, coal cutting is proceeded; Nurse follows coal-winning machine and adopts the mode of " anchor pole c+ wire lath+steel bar ladder beam b " combined supporting to carry out supporting in time to the outstanding first layer false roof exposed routinely, and combined supporting parameter is determined according to false roof lift height and false roof stability; Support moves frame immediate support top board, until all supports of work plane enter bottom, first layer false roof region all completely with machine;
E. after the face stabilizer of bottom, first layer false roof region, enter the preparation that next layering false roof retains, combined supporting parameter is determined according to false roof stability and work plane actual conditions, and anchor pole c arranges perpendicular to top board, and array pitch is identical with coal-winning machine every cutter drilling depth;
F. repeat the process of step c, d, e, complete the reservation of each layering false roof, until remained by whole false roof.
The described supporting segment distance carrying out strengthening supporting to top board is 15 ~ 20m.
Described anchor pole b becomes 30 ° obliquely and points to inside rib with direction of propulsion.
Beneficial effect: owing to have employed technique scheme, the present invention is while the coal mining-filling of solid filling coal-face, false roof is divided into multilayer, take to stay the mode of one deck false roof to be remained by whole false roof at every turn, work plane front realizes the immediate support to rib and false roof, in conjunction with the solid filling in goaf, work plane rear to effective control of top board, reach the control to false roof, realize coal-face and keep the coal stage on file to the safety, the fast transition that retain false roof mining phase by adopting false roof.Complete the reservation of whole false roof, make work plane successfully by exploiting false roof step transition to the stage staying false roof to exploit, provide a kind of effective, economical and practical technical scheme for false roof under China's conditions of similarity retains, its scientific and engineering is significant.
Accompanying drawing explanation
Fig. 1 (a) hangs for first layer false roof of the present invention retains leading face the cross section strengthening supporting schematic diagram revealing top board;
What for first layer false roof of the present invention, Fig. 1 (b) retained that leading face hangs dew top board overlooks strengthening supporting schematic diagram;
Fig. 2 (a) is the cross section false roof strengthening supporting schematic diagram before first layer false roof reservation of the present invention;
Fig. 2 (b) is the false roof strengthening supporting structural representation before first layer false roof reservation of the present invention;
Fig. 3 (a) is the cross section supporting schematic diagram of dew false roof outstanding in first layer false roof retention process of the present invention;
Fig. 3 (b) is the supporting and protection structure schematic diagram of dew false roof outstanding in first layer false roof retention process of the present invention;
Fig. 4 (a) is the cross section roof solidified supporting schematic diagram before the second layering false roof reservation of the present invention;
Fig. 4 (b) is the roof solidified supporting and protection structure schematic diagram before the second layering false roof reservation of the present invention;
Fig. 5 is the work plane effect schematic diagram after whole false roof of the present invention has retained.
In figure: 1-anchor pole a, 2-anchor cable, 3-wire lath, 4-steel bar ladder beam a, 5-top board, 6-false roof, 7-anchor pole b, 8-steel bar ladder beam b, 9-first layer false roof, 10-anchor pole c.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Solid filling coal-face layering of the present invention retains false roof method, work plane mine and goaf filling process in, solid filling coal-face is in the transition stage of adopting false roof exploitation and staying false roof to exploit, false roof is retained by " top is stayed in layering; progressively strengthen ", false roof is divided into n layer, adopts each mode retaining one deck layering false roof to be remained by whole false roof.
The process that described " top is stayed in layering, progressively strengthens " retains false roof is as follows:
A. before retaining false roof, after work plane coal cutting is complete, adopt along the advance of the face direction mode of existing conventional " anchor pole a1+ anchor cable 2+ wire lath 3+ steel bar ladder beam a4 " combined supporting to hang to the whole work plane in support front the top board 5 exposed and carry out strengthening supporting, the distance of strengthening supporting section is 15 ~ 20m; Ensure goaf filling quality by designing requirement simultaneously; Strengthening supporting parameter is determined according to according to work plane actual conditions, and namely the model of anchor pole a1 and anchor cable 2, an array pitch are determined according to work plane actual conditions; Wire lath 3 lap length is not less than 1 Gridding length; Steel bar ladder beam a4 arranges along work plane incline direction;
B. after top board 5 strengthening supporting completes, carry out layering to whole false roof 6, according to the inbreak situation of the lithology of false roof 6, false roof thickness h and false roof, false roof 6 is divided into n layer, and the thickness of each layering false roof is h/n;
C. first retain first layer false roof, before first layer false roof retains, under support shielding, adopt anchor pole b7+ wire lath 3+ steel bar ladder beam b8 combined supporting mode, the fringe region of first layer false roof 9 is reinforced; Described anchor pole b7 becomes 30 ° obliquely and points to inside rib with direction of propulsion; The number of plies and the size of mesh opening of the model of anchor pole b7 and an array pitch, wire lath 3 are determined according to false roof lift height and false roof stability; Steel bar ladder beam b8 arranges along work plane incline direction;
D., after first layer false roof 9 has been reinforced, by coal-winning machine coal cutting height reduction to the one-tenth-value thickness 1/10 of first layer false roof 9, after adjustment coal-winning machine, coal cutting is proceeded; Nurse follows coal-winning machine and adopts the mode of anchor pole c10+ wire lath 3+ steel bar ladder beam b8 combined supporting to carry out supporting in time to the outstanding first layer false roof 9 exposed routinely, and combined supporting parameter is determined according to false roof lift height and false roof stability; Support moves frame immediate support top board, until all supports of work plane enter bottom, first layer false roof 9 region all completely with machine;
E. after the face stabilizer of bottom, first layer false roof 9 region, enter the preparation that next layering false roof retains, combined supporting parameter is determined according to false roof stability and work plane actual conditions, anchor pole c10 arranges perpendicular to top board, array pitch is identical with coal-winning machine every cutter drilling depth, and anchor pole c10 model and spacing are determined according to false roof stability;
F. the reservation of each layering false roof remaining, repeats the process of step c, d, e, completes the reservation of each layering false roof, until remained by whole false roof.
Embodiment 1, work plane overview
Certain solid filling coal-face strike length 150m, tendency length 1198m.Main mining coal seam 8 coal average thickness 2.6m, mean obliquity 7 °; Coal seam immediate roof is harder thin medium sandstone, and base plate is grey black silty; In exploitation process, run into the unstable Sandy Silt false roof that one deck 1600mm is thick, with adopting with falling; False roof remains by the method that work plane adopts " top is stayed in layering, progressively strengthens ".
" top is stayed in layering, progressively strengthens " stays false roof process as follows:
The first step, before retaining false roof, strengthening supporting is carried out to top board:
Before staying false roof, after work plane coal cutting is complete, adopt along the advance of the face direction mode of " anchor pole a1+ anchor cable 2+ wire lath 3+ steel bar ladder beam a4 " combined supporting to hang to the whole work plane in support front the top board 5 exposed and carry out strengthening supporting, strengthening supporting segment distance is 15m, ensures the quality of goaf filling work simultaneously; Stay false roof leading face hang dew top board strengthening supporting mode as Fig. 1 (a, b) shown in; Each support material specification and arrangement as follows:
Anchor pole a1: the twisted steel anchor rod adopting specification Φ 20 × 2200mm, an array pitch 750mm × 600mm;
Anchor cable 2: employing specification is the steel strand anchor cable of Φ 15.5 × 6000mm, array pitch 3000mm × 1200mm between anchor cable;
Wire lath 3: adopt two-tier rhombic wire lath, grid 50 × 50mm, lap length is not less than the length of 1 grid;
Steel bar ladder beam a4: width 80mm, length 1600mm, arranges along work plane tendency direction.
Second step, carries out layering to whole false roof.
The pseudo-top thickness 1600mm of Sandy Silt, with adopting with falling, extremely unstable.False roof 6 is divided into 2 layers, and every layer thickness is 800mm.
3rd step, first layer false roof is reinforced the fringe region of first layer false roof before retaining;
Before retaining first layer false roof 9, under the shielding of support, adopt " anchor pole b7+ wire lath 3+ steel bar ladder beam b8 " combined supporting mode, its support reinforcement carried out to first layer false roof 9, support pattern as Fig. 2 (a, b) shown in; Each support material specification and arrangement as follows:
Anchor pole b7: the twisted steel anchor rod adopting specification Φ 20 × 2200mm, becomes 30 ° obliquely and point to inside rib with direction of propulsion, arrange two row's anchor poles, respectively distance top board 300mm and 600mm, spacing is 600mm;
Wire lath 3: adopt two-tier rhombic wire lath, grid 50 × 50mm, lap length is not less than the length of 1 grid, whole work plane front rib all needs to spread Double-level Reticulated;
Steel bar ladder beam b8: with the reinforcement fabrication of Φ 14, width 80mm, length 1300mm, arrange along work plane tendency direction.
4th step, first layer false roof retention process:
Start to adjust work plane after first layer false roof 9 has been reinforced; Coal-winning machine coal cutting height reduction 800mm, depth of cut starts coal cutting after being kept to 300mm; Nurse follows coal-winning machine and adopts " anchor pole c10+ wire lath 3+ steel bar ladder beam b8 " combined supporting mode to carry out immediate support to the outstanding first layer false roof 9 exposed, support height reduces 800mm and moves frame immediate support top board with machine, until all supports of work plane enter bottom, first layer false roof 9 region all completely, after face stabilizer, the reservation end-of-job of first layer false roof 9, enters the preparation that the 2nd layering retains; In first layer false roof 9 retention process outstanding dew false roof support pattern as Fig. 3 (a, b) shown in; Each support material specification and arrangement as follows:
Anchor pole c10: the twisted steel anchor rod adopting specification Φ 20 × 2200mm, arranges perpendicular to top board, an array pitch 600mm × 300mm;
Wire lath 3: adopt two-tier rhombic wire lath, grid 50 × 50mm, lap length is not less than the length of 1 grid, whole work plane front rib all needs to spread Double-level Reticulated;
Steel bar ladder beam b8: width 80mm, length 1300mm, arranges along work plane tendency direction.
5th step, the reservation of the 2nd layering false roof:
Repeat the process of the 3rd step, the 4th step, complete the reservation of the 2nd layering;
2nd layering puppet retain before roof solidified supporting scheme as Fig. 4 (a, b) shown in, the work plane design sketch after whole false roof has retained is as shown in Figure 5.

Claims (3)

1. a solid filling coal-face layering retains false roof method, work plane mine and goaf filling process in, solid filling coal-face is in the transition stage of adopting false roof exploitation and staying false roof to exploit, false roof is retained by " top is stayed in layering; progressively strengthen ", false roof is divided into n layer, adopts each mode retaining one deck layering false roof to be remained by whole false roof; It is characterized in that:
The process that described " top is stayed in layering, progressively strengthens " retains false roof is as follows:
A. before retaining false roof, after work plane coal cutting is complete, adopt along the advance of the face direction mode of conventional " anchor pole a(1)+anchor cable (2)+wire lath (3)+steel bar ladder beam a(4) " combined supporting to hang to the whole work plane in support front the top board (5) exposed and carry out strengthening supporting, strengthening supporting parameter is determined according to according to work plane actual conditions, ensures goaf filling quality by designing requirement simultaneously;
B. after top board (5) strengthening supporting completes, carry out layering to whole false roof (6), according to the inbreak situation of the lithology of false roof (6), false roof thickness h and false roof, false roof (6) is divided into n layer, and the thickness of each layering false roof is h/n;
C. first first layer false roof is retained, before first layer false roof retains, under support shielding, adopt " anchor pole b(7)+wire lath (3)+steel bar ladder beam b(8) " combined supporting mode, the fringe region of first layer false roof (9) is reinforced;
D., after first layer false roof (9) has been reinforced, by coal-winning machine coal cutting height reduction to the one-tenth-value thickness 1/10 of first layer false roof (9), after adjustment coal-winning machine, coal cutting is proceeded; Nurse follows coal-winning machine and adopts the mode of " anchor pole c(10)+wire lath (3)+steel bar ladder beam b(8) " combined supporting to carry out supporting in time to the outstanding first layer false roof (9) exposed routinely, and combined supporting parameter is determined according to false roof lift height and false roof stability; Support moves frame immediate support top board, until all supports of work plane enter first layer false roof (9) bottom, region all completely with machine;
E. after the face stabilizer of first layer false roof (9) bottom, region, enter the preparation that next layering false roof retains, combined supporting parameter is determined according to false roof stability and work plane actual conditions, anchor pole c(10) to arrange perpendicular to top board, array pitch is identical with coal-winning machine every cutter drilling depth;
F. the process of step c, d, e is repeated ,complete the reservation of each layering false roof, until remained by whole false roof.
2. a kind of solid filling coal-face layering as claimed in claim 1 retains false roof method, it is characterized in that: described to hang to the whole work plane in support front the supporting segment distance that the top board (5) exposed carries out strengthening supporting be 15 ~ 20m.
3. a kind of solid filling coal-face layering as claimed in claim 1 retains false roof method, it is characterized in that: described anchor pole b(7) become 30 ° with direction of propulsion obliquely and point to inside rib.
CN201410483835.7A 2014-09-19 2014-09-19 The layering of a kind of solid filling coal-face retains false roof method CN104265292B (en)

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