CN105735995A - Gob-side roadway retaining method based on roof cutting of soft roof plate - Google Patents
Gob-side roadway retaining method based on roof cutting of soft roof plate Download PDFInfo
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- CN105735995A CN105735995A CN201610072542.9A CN201610072542A CN105735995A CN 105735995 A CN105735995 A CN 105735995A CN 201610072542 A CN201610072542 A CN 201610072542A CN 105735995 A CN105735995 A CN 105735995A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005520 cutting process Methods 0.000 title claims abstract description 29
- 239000004744 fabric Substances 0.000 claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000003245 working effect Effects 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 12
- 239000011496 polyurethane foam Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 7
- 239000000565 sealant Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005422 blasting Methods 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 239000011378 shotcrete Substances 0.000 claims description 4
- 210000003141 lower extremity Anatomy 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- -1 hydraulic prop Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 229910052626 biotite Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a gob-side roadway retaining method based on roof cutting of a soft roof plate. According to the gob-side roadway retaining method based on roof cutting of the soft roof plate, a movable stop lever air leakage preventing device is used for assisting in roadway formation, so that roadway formation achieved by filling walls with concrete in the prior art is replaced; the adopted stop lever air leakage preventing device is an assembly, and the whole stop lever air leakage preventing device is of a square tubular structure and comprises an upper cap plate, folding air cloth, a single hydraulic prop, a steel wire mesh and a lower shoe plate; the steel wire mesh is hung on the side close to a gob; and the folding air cloth is fixed to the side close to a roadway. The stop lever air leakage preventing device and a working face advance to be dismounted and mounted synchronously and can be moved to another place to be used again, after the stop lever air leakage preventing device is dismounted and moved, liquid concrete is sprayed onto a wall formed by rocks exposed out of one side of the stop lever air leakage preventing device, and a series of technique means such as gap blocking and sealing are adopted, so that compared with a gob-side roadway retaining method in the prior art, the gob-side roadway retaining method based on roof cutting of the soft roof plate has the beneficial effects that the roadway forming speed is high, the efficiency is high, the safety performance is good, the concrete filling work amount is small, and the cost is low.
Description
Technical field
The present invention relates to a kind of gob-side entry retaining method, particularly relate to a kind of loose roof and cut the gob-side entry retaining method under top；Belong to coal mining industrial circle.
Background technology
Along with the continuous exploitation of first resource coal, this very ripe conventional art of gob side entry retaining, again become the hot research problem that those skilled in the art constantly explore, pursue breakthrough and technological innovation.
The method of the gob side entry retaining of early stage mainly advances with working face extraction, utilizes the means such as roadside packing, safeguards along edge, goaf and retains former stope drift active workings, thus cancelling protection pillar, uses as lower curtate work surface driving along next gob tunnel.
But, owing to supporting body of wall is subjected to the impact adopted twice, supporting body of wall is easy to communication goaf, crack occur, easy initiation fire, gas explosion accident, and body of wall is safeguarded more difficult, construct supporting body of wall and to protect lane cost also higher, serious restriction edge air gallery technology application and development.
In recent years, development along with suspension roof support, top board Qie Dingcheng lane technology makes some progress in gob side entry retaining field, by to staying lane back to implement Advance presplitting, cut off back and goaf directly push up, the contacting of base object model, collapse disconnected along pre-broken face under periodic weighting effect, with anchor cable, anchor pole, anchor net etc., direct top-hung be hung under base object model simultaneously, stop and directly push up across falling, thus saving filled wall.
But, this gob-side entry retaining method is primarily adapted under tight roof to carry out.Reason is in that, when tight roof, cuts the top board that falls mainly in big biotite gneiss, cuts the big biotite gneiss fallen and is directly filled in goaf, and directly serves as the isolation body of wall in tunnel to completely cut off goaf.
But, gob side entry retaining when for loose roof, owing to top board belongs to crumbly rock, cutting backward roof cracking will be very serious, and the broken spoil that particle diameter is less is easy to pour into tunnel, even if can block with anchor net, goaf is easily linked up in broken spoil space, threatens the production of mine.Therefore, prior art is commonly used builds by laying bricks or stones or constructing concrete filled wall in side, goaf, and one is for the body of wall as tunnel, completely cuts off goaf；Two are, top board is produced certain auxiliary supporting role.
In actual production process, building by laying bricks or stones or constructing of concrete filling body of wall, is that quantities is very huge, wastes time and energy on the one hand, and filling cost remains high；It is that concrete filling body of wall when this special operation condition is in process of setting, and problem wall body slit or cracking easily occur, inspection, maintenance and maintenance are very difficult on the other hand；What is more important, the performance of concrete initial set intensity needs 7 day time, and this directly constrains the fltting speed of coal mining coal-face, becomes the bottleneck that restriction coal production efficiency improves.
For the gob side entry retaining in seam mining under loose roof, how under the premise ensured safety in production, accelerate the shaping in tunnel, reduce filling cost, raising production efficiency, have become as a realistic problem urgently to be resolved hurrily.
Summary of the invention
It is an object of the invention to, a kind of loose roof is provided to cut the gob-side entry retaining method under top, the pin air leakage preventing device of its movable mounting structure recycling assists into lane, substitute traditional concrete filling body of wall, the technical characterstics such as laneway molding speed is fast, efficiency is high for it, safety is good, concrete filling quantities is little, cost is low.
The present invention be employed technical scheme comprise that for achieving the above object, and the gob-side entry retaining method under top cut by a kind of loose roof, it is characterised in that adopts pin air leakage preventing device to assist into lane, specifically comprises the following steps that
The first step, tunnel anchor cable/rod and bolting with wire mesh step:
During stope drift active workings driving, anchor cable is got on base object model, directly top is hung on base object model, and maintains the integrity of loose roof with anchor net；
Second step, joint-cutting step:
In stope drift active workings, drilling seam hole along the first advance construction top board of the side, goaf that will be formed, and adopt CUMULATIVE BLASTING presplitting technology, joint-cutting on top board；
3rd step, pin air leakage preventing device is installed, Qie Dingcheng lane step:
First coal-face often pushes ahead a drilling depth, in the side near stope drift active workings, is close to joint-cutting and installs a pin air leakage preventing device；
So circulation, until first coal-face back production terminates, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned first coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
Meanwhile, the opposite side at pin air leakage preventing device is isolated out a tunnel, as the stope drift active workings of second stope；
When carrying out second working face extraction, often advance a drilling depth, erection sequence by first job face progradation central stop lever air leakage preventing device, remove that pin air leakage preventing device in front installation successively, and it is installed in the side of the close lower crossheading stope drift active workings of second work surface, it is close to joint-cutting and installs；
So circulation, until second coal-face back production terminates, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned second coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
In the demolishing process of above-mentioned pin air leakage preventing device, when often removing a pin air leakage preventing device, seal with wind cloth in the termination of pin air leakage preventing device；And to the side being removed this pin air leakage preventing device, exposed rock block metope gunite concrete out is starched, and rock block metope is cemented to one, carries out gap plugging, sealing, to prevent goaf air leaking；
4th step, repeats above-mentioned 3rd step, until whole exploiting field has been exploited；
Above-mentioned pin air leakage preventing device is molectron, and entirety is square tubular structure, including upper cap plate, folding wind cloth, hydraulic prop, steel wire and lower footwear plate；Wherein, two planes up and down of upper cap plate and lower footwear plate composition rectangular tube, two, the left and right plane of folding wind cloth and steel wire composition rectangular tube；
Upper cap plate and lower footwear plate are arranged parallel to one on the other, and upper cap plate becomes to removably connect with the piston rod of hydraulic prop, and lower footwear plate becomes to removably connect with the base of hydraulic prop；
One side suspension of steel wire is near side, goaf on upper cap plate, and another side suspension is close side, goaf on lower footwear plate；
One limit of folding wind cloth is fixed on cap plate near the side in tunnel, and another limit is fixed on lower footwear plate near the side in tunnel.
What technique scheme was directly brought has the technical effect that, may move after employing, open unload, the pin air leakage preventing device of recyclable Reusability assists into lane, on the basis of existing technology, eliminates building by laying bricks or stones or constructing of concrete filling body of wall.
This on the one hand, greatly reduces concrete filling quantities, time saving and energy saving province expense；
On the other hand, owing to the installation required time of pin air leakage preventing device is extremely of short duration, can effectively ensure that leaking out in entrance tunnel, goaf is carried out synchronizing to block, seal (coordinating concrete grout injection closure, sealing to be caving rock mass wall) by immediately；And, moreover it is possible to avoid that concrete filling body of wall is easy to crack, the problem of Inspection and maintenance and maintenance difficult.
That is, the tunnel barriering efficiency to harmful gas can be promoted significantly, improve coal production safety.
It should be noted that in advance of the face process, each pin air leakage preventing device is not only Anti-air-leakage, also has the highly important effect to be, utilizes monomer whose hydraulic prop, top board is undertaken by upper cap plate " interim ", firm supporting role.
It is to say, before laneway molding, pin air leakage preventing device both can realize the supporting role of the concrete filling body of wall of prior art, " Anti-air-leakage " effect that concrete filling body of wall can play can be realized again.The ingenious part of this namely technique scheme.
It is preferably, the upper surface of above-mentioned upper cap plate and the lower surface of lower footwear plate, further averages and be not stained with one layer of polyurethane foam board.
What this optimal technical scheme was directly brought has the technical effect that, one layer of polyurethane foam board is adhered to respectively at the upper surface of upper cap plate and the lower surface of lower footwear plate, utilize polyurethane foam board performance flexible, compressible, can thoroughly eliminate the gap of pin air leakage preventing device and top board with base plate contact surface, it is ensured that do not leak out.
It is preferred that, above-mentioned upper cap plate and lower footwear plate are each on that limit of side, goaf, and uniform welding has a number of hook for hanging steel wire respectively.
What this optimal technical scheme was directly brought has the technical effect that, it is simple to the fast dismantling of steel wire and dress.
It is preferred that, the gob-side entry retaining method under top cut by above-mentioned loose roof, also includes sealant tape, and described sealant tape is for sealing up the overlapping the slot between end to end adjacent two pin air leakage preventing devices.
What this optimal technical scheme was directly brought has the technical effect that, can thoroughly eliminating between pin air leakage preventing device and pin air leakage preventing device and to leak out a little caused by overlapping the slot that may be present, the tunnel improving the method for the present invention further prevents the ability of goaf air leaking.
It is preferred that, the top edge of above-mentioned folding wind cloth is clamped between polyurethane foam board and upper cap plate, the lower limb of folding wind cloth is clamped between polyurethane foam board and lower footwear plate.
What this optimal technical scheme was directly brought has the technical effect that, it is possible to effectively two respective neighboring regions in limit up and down of the folding wind cloth of protection are not worn or hurt, scratching, and extend the service life of folding wind cloth.
In sum, the present invention, relative to prior art, has the beneficial effects such as laneway molding speed is fast, efficiency is high, safety is good, concrete filling quantities is little, cost is low.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram in tunnel of the present invention；
Fig. 2 is the plane arrangement structure schematic diagram in tunnel of the present invention；
Fig. 3 is the pin air leakage preventing device axle geodesic structure schematic diagram of the present invention；
Fig. 4 is one of the pin air leakage preventing device decomposition texture schematic diagram of the present invention (mainly illustrating steel wire side)；
Fig. 5 is two (mainly illustrating folding wind cloth side) of the pin air leakage preventing device decomposition texture schematic diagram of the present invention；
The pin air leakage preventing device combination that Fig. 6 is the present invention uses one of status architecture schematic diagram (mainly illustrating steel wire side)；
Fig. 7 is two (mainly illustrating folding wind cloth side) of the pin air leakage preventing device combination use status architecture schematic diagram of the present invention.
Description of reference numerals:
1, polyurethane foam board；2, upper cap plate；3, hydraulic prop；4, hook；5, steel wire；6, lower footwear plate；8, sealant tape；11, folding wind cloth.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.As shown in Figure 1 and Figure 2, the gob-side entry retaining method under top cut by the loose roof of the present invention, and it adopts pin air leakage preventing device to assist into lane, specifically comprises the following steps that
The first step, tunnel anchor cable/rod and bolting with wire mesh step:
During stope drift active workings driving, anchor cable is got on base object model, directly top is hung on base object model, and maintains the integrity of loose roof with anchor net；
Second step, joint-cutting step:
In stope drift active workings, drilling seam hole along the first advance construction top board of the side, goaf that will be formed, and adopt CUMULATIVE BLASTING presplitting technology, joint-cutting on top board；
3rd step, pin air leakage preventing device is installed, Qie Dingcheng lane step:
First coal-face often pushes ahead a drilling depth, in the side near stope drift active workings, is close to joint-cutting and installs a pin air leakage preventing device；
So circulation, until first coal-face back production terminates, as shown in Figure 6, Figure 7, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned first coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
Meanwhile, the opposite side at pin air leakage preventing device is isolated out a tunnel, as the stope drift active workings of second stope；
When carrying out second working face extraction, often advance a drilling depth, erection sequence by first job face progradation central stop lever air leakage preventing device, remove that pin air leakage preventing device in front installation successively, and it is installed in the side of the close lower crossheading stope drift active workings of second work surface, it is close to joint-cutting and installs；
So circulation, until second coal-face back production terminates, as shown in Figure 6, Figure 7, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned second coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
In the demolishing process of above-mentioned pin air leakage preventing device, when often removing a pin air leakage preventing device, seal with wind cloth in the termination of pin air leakage preventing device；And to the side being removed this pin air leakage preventing device, exposed rock block metope gunite concrete out is starched, and rock block metope is cemented to one, carries out gap plugging, sealing, to prevent goaf air leaking；
4th step, repeats above-mentioned 3rd step, until whole exploiting field has been exploited；
As shown in Figures 3 to 5, above-mentioned pin air leakage preventing device is molectron, and entirety is square tubular structure, including upper cap plate 2, folding wind cloth 11, hydraulic prop 3, steel wire 5 and lower footwear plate 6；Wherein, upper cap plate 2 and lower footwear plate 6 form two planes up and down of rectangular tube, and folding wind cloth 11 and steel wire 5 form two, the left and right plane of rectangular tube；
Upper cap plate 2 and lower footwear plate 11 are arranged parallel to one on the other, and upper cap plate 2 becomes to removably connect with the piston rod of hydraulic prop 3, and lower footwear plate 6 becomes to removably connect with the base of hydraulic prop 3；
One side suspension of steel wire 5 is near side, goaf on upper cap plate 2, and another side suspension is close side, goaf on lower footwear plate 6；
One limit of folding wind cloth 11 is fixed on cap plate 2 near the side in tunnel, and another limit is fixed on lower footwear plate 6 near the side in tunnel.
For ensureing the seamless link between pin air leakage preventing device and top board and base plate, elimination is leaked out, the upper surface of above-mentioned upper cap plate 2 and the lower surface of lower footwear plate 6, further averages and is not stained with one layer of polyurethane foam board 1.
Quickly dismantling and being seated for ease of steel wire 5, above-mentioned upper cap plate 2 and lower footwear plate 6 are each on that limit of side, goaf, and uniform welding has a number of hook 4 for hanging steel wire 5 respectively.
The gob-side entry retaining method under top cut by above-mentioned loose roof, also includes sealant tape 8, and above-mentioned sealant tape is for sealing up the overlapping the slot between end to end adjacent two pin air leakage preventing devices.
The top edge of above-mentioned folding wind cloth 11 is clamped between polyurethane foam board 1 and upper cap plate 2, the lower limb of folding wind cloth is clamped between polyurethane foam board 1 and lower footwear plate 6.
Embodiment 1
For certain ore deposit 2208 work surface, strike length is 862m, and tilt length is 167m, and working seam is 8OnCoal, buried depth H=610-750m, coal seam thickness 1.65-3.35m, average 2.67m, seam inclination 1 °-5 °, average 2 °.
Directly top is mud stone, packsand, siltstone, belongs to II class unstable roof, average thickness 2.35m.
Base object model belongs to II class base object model, is mainly made up of gritstone, packsand, siltstone, average thickness 5.86m；The unidirectional comprcssive strength of roof rock is 19.78MPa, and unidirectional tensile strength divides 0.96MPa, and intensity is low, belongs to soft stratum.
Adopt retrusive comprehensive mechanical coal mining.
Working face extraction drift section is rectangle, and it is of a size of 4.6m × 2.6m (clear span × clear height),
Gob-side entry retaining method:
The first step, tunnel anchor cable/rod and bolting with wire mesh step:
Under 2208 work surfaces during crossheading stope drift active workings driving, anchor cable is got on base object model, directly top is hung on base object model, and maintains the integrity of loose roof with anchor net；
Second step, joint-cutting step:
In stope drift active workings, drilling seam hole along the first advance construction top board of the side, goaf that will be formed, and adopt CUMULATIVE BLASTING presplitting technology, joint-cutting on top board；
3rd step, pin air leakage preventing device is installed, Qie Dingcheng lane step:
2208 work surfaces often push ahead a drilling depth, in the side near stope drift active workings, are close to joint-cutting and install a pin air leakage preventing device；
So circulation, until 2208 coal-face back production terminate, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned 2208 work surfaces, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
Meanwhile, the opposite side at pin air leakage preventing device is isolated out a tunnel, as the stope drift active workings of second back production 2210 work surface；
When carrying out 2210 working face extraction, often advance a drilling depth, erection sequence by 2208 advance of the face process central stop lever air leakage preventing devices, remove that pin air leakage preventing device in front installation successively, and it is installed in the side of the close lower crossheading stope drift active workings of 2210 work surfaces, it is close to joint-cutting and installs；
So circulation, until 2210 working face extractions terminate, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned 2210 work surfaces, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
In the demolishing process of above-mentioned pin air leakage preventing device, when often removing a pin air leakage preventing device, seal with wind cloth in the termination of pin air leakage preventing device；And to gunite concrete slurry on the body of wall of the exposed rock block composition out in the side being removed this pin air leakage preventing device, carry out gap plugging, sealing, to prevent goaf air leaking；
4th step, repeats above-mentioned 3rd step, until whole exploiting field has been exploited.
Adopting the gob-side entry retaining method of the present invention, the mine essentially identical or similar with original mining conditions adopts the construction method contrast constructing or building by laying bricks or stones concrete filling body of wall by lane:
Coal mining efficiency improves about 20%, and filling cost reduces about 80%, and ton coal production cost reduces about 3-5%；
Further, the concrete filling operator of required outfit decrease 2-3 name, and the labor intensity of workman is also greatly reduced.
Claims (5)
1. the gob-side entry retaining method under top cut by a loose roof, it is characterised in that adopts pin air leakage preventing device to assist into lane, specifically comprises the following steps that
The first step, tunnel anchor cable/rod and bolting with wire mesh step:
During stope drift active workings driving, anchor cable is got on base object model, directly top is hung on base object model, and maintains the integrity of loose roof with anchor net；
Second step, joint-cutting step:
In stope drift active workings, drilling seam hole along the first advance construction top board of the side, goaf that will be formed, and adopt CUMULATIVE BLASTING presplitting technology, joint-cutting on top board；
3rd step, pin air leakage preventing device is installed, Qie Dingcheng lane step:
First coal-face often pushes ahead a drilling depth, in the side near stope drift active workings, is close to joint-cutting and installs a pin air leakage preventing device；
So circulation, until first coal-face back production terminates, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned first coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
Meanwhile, the opposite side at pin air leakage preventing device is isolated out a tunnel, as the stope drift active workings of second stope；
When carrying out second working face extraction, often advance a drilling depth, erection sequence by first job face progradation central stop lever air leakage preventing device, remove that pin air leakage preventing device in front installation successively, and it is installed in the side of the close lower crossheading stope drift active workings of second work surface, it is close to joint-cutting and installs；
So circulation, until second coal-face back production terminates, a number of pin air leakage preventing device joins end to end；
Constantly push ahead in process at above-mentioned second coal-face, top board is outstanding long-pending increase of showing up in goaf, under action of underground, loose roof will be cut along joint-cutting automatically, cut the rock block fallen and be filled in the side in goaf under the obstruct of pin air leakage preventing device；
In the demolishing process of above-mentioned pin air leakage preventing device, when often removing a pin air leakage preventing device, seal with wind cloth in the termination of pin air leakage preventing device；And to the side being removed this pin air leakage preventing device, exposed rock block metope gunite concrete out is starched, and rock block metope is cemented to one, carries out gap plugging, sealing, to prevent goaf air leaking；
4th step, repeats above-mentioned 3rd step, until whole exploiting field has been exploited；
Above-mentioned pin air leakage preventing device is molectron, and entirety is square tubular structure, including upper cap plate, folding wind cloth, hydraulic prop, steel wire and lower footwear plate；Wherein, two planes up and down of upper cap plate and lower footwear plate composition rectangular tube, two, the left and right plane of folding wind cloth and steel wire composition rectangular tube；
Upper cap plate and lower footwear plate are arranged parallel to one on the other, and upper cap plate becomes to removably connect with the piston rod of hydraulic prop, and lower footwear plate becomes to removably connect with the base of hydraulic prop；
One side suspension of steel wire is near side, goaf on upper cap plate, and another side suspension is close side, goaf on lower footwear plate；
One limit of folding wind cloth is fixed on cap plate near the side in tunnel, and another limit is fixed on lower footwear plate near the side in tunnel.
2. the gob-side entry retaining method under top cut by loose roof according to claim 1, it is characterised in that the upper surface of described upper cap plate and the lower surface of lower footwear plate, further averages and is not stained with one layer of polyurethane foam board.
3. the gob-side entry retaining method under top cut by loose roof according to claim 1, it is characterised in that described upper cap plate and lower footwear plate are each on that limit of side, goaf, and uniform welding has a number of hook for hanging steel wire respectively.
4. the gob-side entry retaining method under top cut by loose roof according to claim 1, it is characterised in that also include sealant tape, and described sealant tape is for sealing up the overlapping the slot between end to end adjacent two pin air leakage preventing devices.
5. the gob-side entry retaining method under top cut by loose roof according to claim 2, it is characterized in that, the top edge of described folding wind cloth is clamped between polyurethane foam board and upper cap plate, the lower limb of folding wind cloth is clamped between polyurethane foam board and lower footwear plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610072542.9A CN105735995B (en) | 2016-02-02 | 2016-02-02 | A kind of loose roof cuts the gob-side entry retaining method under top |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106121537A (en) * | 2016-07-22 | 2016-11-16 | 山东科技大学 | The Qie Dingcheng of gob side entry retaining without coal column lane construction method |
| CN106837397A (en) * | 2017-03-20 | 2017-06-13 | 山东科技大学 | A kind of device and method isolated for gob side entry retaining lane side with supporting |
| CN107387084A (en) * | 2017-09-15 | 2017-11-24 | 中国矿业大学 | A kind of gob side entry retaining reduces the construction method for cutting top depth |
| CN107575229A (en) * | 2017-09-26 | 2018-01-12 | 山东科技大学 | A kind of class house pillar type coal mining method cut top filling and close on goaf |
| CN107956509A (en) * | 2017-11-24 | 2018-04-24 | 河南理工大学 | One kind cuts top gob side entry retaining Anti-air-leakage method stage by stage |
| CN108643907A (en) * | 2018-05-11 | 2018-10-12 | 山东科技大学 | One kind being crushed direct top edge sky caving into lane without pillar mining method |
| CN108678769A (en) * | 2018-05-16 | 2018-10-19 | 山东科技大学 | Deep Gateway anchor note cuts top master control and stays lane method |
| CN108825277A (en) * | 2018-06-20 | 2018-11-16 | 湖南科技大学 | A kind of surrounding rock of actual mining roadway control method completely cutting off work rock pressure |
| CN109630112A (en) * | 2018-10-26 | 2019-04-16 | 山东科技大学 | A kind of N00 mining codes for cutting top filling |
| CN109882172A (en) * | 2019-04-08 | 2019-06-14 | 山东科技大学 | A kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top |
| CN111236941A (en) * | 2020-02-19 | 2020-06-05 | 兖州煤业股份有限公司 | Method for fully mechanized mining face to pass through cross-layer roadway |
| CN111535862A (en) * | 2020-04-30 | 2020-08-14 | 山东科技大学 | Folding and unfolding type quick plugging device for trapezoidal roadway |
| CN111636873A (en) * | 2020-07-09 | 2020-09-08 | 北京中矿创新联盟能源环境科学研究院 | Goaf air leakage prevention method for thin coal seam N00 mining method |
| CN112065394A (en) * | 2020-09-11 | 2020-12-11 | 中国矿业大学 | Roof cutting and roadway retaining cooperative anchoring and protecting structure and construction method thereof |
| CN112664269A (en) * | 2020-12-17 | 2021-04-16 | 华能煤炭技术研究有限公司 | Gob-side entry retaining mining area side sealing structure and side air leakage preventing method |
| CN113074020A (en) * | 2021-05-17 | 2021-07-06 | 贵州盘江煤电集团技术研究院有限公司 | Waste rock retaining and supporting device for coal mine gob-side entry retaining and using method thereof |
| CN113530543A (en) * | 2021-06-04 | 2021-10-22 | 华能煤炭技术研究有限公司 | Entry gate crossheading roof cutting height design method and entry gate crossheading maintenance method |
| CN114294058A (en) * | 2021-12-30 | 2022-04-08 | 河南理工大学 | Waste rock pocket device for roof cutting and roadway retaining and working method thereof |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121537A (en) * | 2016-07-22 | 2016-11-16 | 山东科技大学 | The Qie Dingcheng of gob side entry retaining without coal column lane construction method |
| CN106837397A (en) * | 2017-03-20 | 2017-06-13 | 山东科技大学 | A kind of device and method isolated for gob side entry retaining lane side with supporting |
| CN107387084A (en) * | 2017-09-15 | 2017-11-24 | 中国矿业大学 | A kind of gob side entry retaining reduces the construction method for cutting top depth |
| CN107575229A (en) * | 2017-09-26 | 2018-01-12 | 山东科技大学 | A kind of class house pillar type coal mining method cut top filling and close on goaf |
| CN107956509A (en) * | 2017-11-24 | 2018-04-24 | 河南理工大学 | One kind cuts top gob side entry retaining Anti-air-leakage method stage by stage |
| CN107956509B (en) * | 2017-11-24 | 2020-05-26 | 河南理工大学 | Method for preventing wind leakage by stages in roof cutting gob-side entry retaining |
| CN108643907B (en) * | 2018-05-11 | 2020-02-25 | 山东科技大学 | Non-pillar mining method for broken direct roof caving roadway |
| CN108643907A (en) * | 2018-05-11 | 2018-10-12 | 山东科技大学 | One kind being crushed direct top edge sky caving into lane without pillar mining method |
| CN108678769A (en) * | 2018-05-16 | 2018-10-19 | 山东科技大学 | Deep Gateway anchor note cuts top master control and stays lane method |
| CN108825277A (en) * | 2018-06-20 | 2018-11-16 | 湖南科技大学 | A kind of surrounding rock of actual mining roadway control method completely cutting off work rock pressure |
| CN109630112A (en) * | 2018-10-26 | 2019-04-16 | 山东科技大学 | A kind of N00 mining codes for cutting top filling |
| CN109882172A (en) * | 2019-04-08 | 2019-06-14 | 山东科技大学 | A kind of cut falls the gob-side entry retaining method that roadside support wall is done on directly top |
| CN109882172B (en) * | 2019-04-08 | 2020-07-07 | 山东科技大学 | Gob-side entry retaining method by using cut-off direct roof as roadside support wall |
| CN111236941A (en) * | 2020-02-19 | 2020-06-05 | 兖州煤业股份有限公司 | Method for fully mechanized mining face to pass through cross-layer roadway |
| CN111236941B (en) * | 2020-02-19 | 2021-09-17 | 兖州煤业股份有限公司 | Method for fully mechanized mining face to pass through cross-layer roadway |
| CN111535862A (en) * | 2020-04-30 | 2020-08-14 | 山东科技大学 | Folding and unfolding type quick plugging device for trapezoidal roadway |
| CN111535862B (en) * | 2020-04-30 | 2021-10-29 | 山东科技大学 | Folding and unfolding type quick plugging device for trapezoidal roadway |
| CN111636873A (en) * | 2020-07-09 | 2020-09-08 | 北京中矿创新联盟能源环境科学研究院 | Goaf air leakage prevention method for thin coal seam N00 mining method |
| CN111636873B (en) * | 2020-07-09 | 2021-02-23 | 北京中矿创新联盟能源环境科学研究院 | Goaf air leakage prevention method for thin coal seam N00 mining method |
| CN112065394A (en) * | 2020-09-11 | 2020-12-11 | 中国矿业大学 | Roof cutting and roadway retaining cooperative anchoring and protecting structure and construction method thereof |
| CN112664269A (en) * | 2020-12-17 | 2021-04-16 | 华能煤炭技术研究有限公司 | Gob-side entry retaining mining area side sealing structure and side air leakage preventing method |
| CN112664269B (en) * | 2020-12-17 | 2024-01-30 | 华能煤炭技术研究有限公司 | Gob-side entry retaining goaf side sealing structure and side air leakage preventing method |
| CN113074020A (en) * | 2021-05-17 | 2021-07-06 | 贵州盘江煤电集团技术研究院有限公司 | Waste rock retaining and supporting device for coal mine gob-side entry retaining and using method thereof |
| CN113530543A (en) * | 2021-06-04 | 2021-10-22 | 华能煤炭技术研究有限公司 | Entry gate crossheading roof cutting height design method and entry gate crossheading maintenance method |
| CN114294058A (en) * | 2021-12-30 | 2022-04-08 | 河南理工大学 | Waste rock pocket device for roof cutting and roadway retaining and working method thereof |
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