CN107313778B - A kind of second mining super high seam stops the method for adopting line coal column - Google Patents
A kind of second mining super high seam stops the method for adopting line coal column Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 178
- 238000005065 mining Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 238000012856 packing Methods 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 9
- 230000002269 spontaneous effect Effects 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000003245 working effect Effects 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 206010051986 Pneumatosis Diseases 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000006210 lotion Substances 0.000 claims description 3
- 230000000505 pernicious effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- COCAUCFPFHUGAA-MGNBDDOMSA-N n-[3-[(1s,7s)-5-amino-4-thia-6-azabicyclo[5.1.0]oct-5-en-7-yl]-4-fluorophenyl]-5-chloropyridine-2-carboxamide Chemical compound C=1C=C(F)C([C@@]23N=C(SCC[C@@H]2C3)N)=CC=1NC(=O)C1=CC=C(Cl)C=N1 COCAUCFPFHUGAA-MGNBDDOMSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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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
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- 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
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of methods that second mining super high seam stops adopting line coal column, comprising the following steps: (1) simulates the position of coal column second mining working face haulage gate and track crossheading；(2) former work face goaf where adopting line coal column is stopped to super high seam and carries out comprehensive survey, exclude security risk；(3) tunnel along coal column second mining advance of the face direction is tunneled on super high seam top, is roadside packing tunnel；(4) coal column second mining working face extraction tunnel and attached inclined gallery are tunneled and forms it into complete production system, arrange coal column second mining working face；(5) it from top to bottom drills in roadway floor, makees filling piping；(6) fill paste is prepared, is uniformly injected into haulage gate close to the side of former work face goaf along above-mentioned filling piping；(7) coal column second mining working face carries out longwall top coal caving.The present invention reduces pressure coal amounts, avoid the waste of coal resources, improve Business Economic Benefit, extend mine and mining area service life.
Description
Technical field
The present invention relates to a kind of methods that second mining super high seam stops adopting line coal column, belong to coal mining technology field.
Background technique
Currently, during the coal production in China annual 45% or more is high seam source, coal resources are often with coal column
Form is left underground.With the development of non chain pillar entryprotection technology in recent years, the brought Coal Loss of section coal pillar is serious
Problem is effectively solved, but need to be solved about stopping adopting the serious problem of the brought Coal Loss of line coal column.
Existing available resources are increasingly exhausted, and energy demand day is becoming tight, and coal is left as valuable non-renewable resources
If coal column not by existing roadways layout produce, carry out again later it is secondary extraction by costly cost, some are very
It abandons to permanent in underground, causes the huge wasting of resources.Therefore, second mining Aged mine stops adopting line coal column to Yanchang Area or mine
The service life of well improves the rate of extraction of resource, extenuates enterprise's pressure etc. and all has important practical significance.With 8105 work of Tashan Mountain coal mine
For making face, stop adopting line coal pillar width up to 230m, cause the significant wastage of coal resources, thus urgently finds a kind of to special thick coal
Layer stops the method for adopting line coal column second mining.
Super high seam stops adopting the second mining of line coal column relative to common working face extraction, be difficult to guarantee with safety, be at high cost etc.
Problem, particular technique difficult point are:
(1) spontaneous combustion of the coal column close to goaf side coal seam: since super high seam working face extraction finishes, coal column is close to be adopted
The residual float coal of dead zone side is more, and float coal gradually aoxidizes, and spontaneous combustion tendency increases, and the safety for influencing protection pillar second mining is raw
It produces.
(2) coal column gathering close to goaf side gas: since super high seam working face extraction finishes, goaf envelope
It closes, goaf rear portion is by top plate spontaneous caving and is compacted again, so that gas of the coal column close to goaf side largely gathers,
Influence the safety in production of protection pillar second mining.
Second mining super high seam longwall coal-mining method is left at present stop adopting line coal column research it is less, often all concentrate on
In terms of medium-thickness seam room mining leaves the recycling of coal column.For the recycling of pillar, the prior art that can be obtained is such as
Chinese patent: CN105888665A " design method of pillar recovery scheme " provides a kind of pillar recovery scheme
Design method, this invention be the tentative programme that protection pillar recycle by establishing Three-dimensional CAD carry out mechanical analysis with
Verifying, is then loaded into row safety analysis, the rate of extraction and Economic and Efficiency Analysis, which is several shield lanes proposed to mine
Pillar Recovery scheme is verified, and is not practical roadway layout, production system and the operating method with coal pillar recovery；Again
Such as Chinese patent: CN101967975A " super high seam (14-20m) high working face longwall top coal caving technology " proposes that super high seam is big
The comprehensive relieving of high working face of the full set such as the reasonable frame type of the coal-mining method of mining height longwall top coal caving, drawing coal technology, bracket, equipment capacity
The technology adopted, the invention primarily directed to 14-20m super high seam fully mechanized coal face and a whole set of technique skill for proposing
Art, has certain generality, but for stop adopting line coal column it is this kind of it is special leave coal resources and can be applicable in also be worth discussion.
However the particularity set is stayed due to stopping adopting line coal column, existing super high seam stops adopting the second mining of line coal column, and that there is also some technologies is difficult
Topic, in existing open source literature, there are no the reports of related second mining method.
Summary of the invention
The present invention is directed to cut eye using former working face extraction tunnel as what super high seam stopped adopting line coal column second mining working face,
And the haulage gate and track crossheading of coal column second mining working face are tunneled, and then arrange coal column second mining working face, it realizes to life
It produces mine super high seam to stop adopting the second mining of line coal column, to solve the problems, such as to stop adopting the serious of line coal column Coal Loss.
The present invention provides a kind of methods that second mining super high seam stops adopting line coal column, specifically includes the following steps:
(1) the original geologic information of mine, technical data, the means of production are combined, it is multiple with numerical simulation software simulation coal column
The position of mining face haulage gate and track crossheading；
(2) former work face goaf where adopting line coal column is stopped to super high seam and carries out comprehensive survey, exclude existing safety
Hidden danger, to reach safety in production；
(3) according to mine shaft geology data, one is tunneled along coal column second mining advance of the face direction on super high seam top
Tunnel, as roadside packing tunnel；
(4) coal column second mining working face extraction tunnel and attached inclined gallery are tunneled and forms it into complete production system, arrange coal
Column second mining working face；
(5) it in the tunnel that step (3) is dug, from top to bottom drills in roadway floor, which is that super high seam stops adopting
The filling piping of line coal column second mining working face haulage gate；
(6) fill paste is prepared, filling piping under the action of filling pump along step (5) is uniform by the lotion prepared
Haulage gate is injected close to the side of former work face goaf, condenses it sufficiently；
(7) longwall top coal caving equipment is arranged in former working face track crossheading, coal column second mining working face carries out longwall top coal caving.
In above scheme, in step (1), preferred numerical simulation software is FLAC3D, reasonable back production is determined by simulation
Tunnel (coal column second mining working face haulage gate and track crossheading) position, and country rock limit equilibrium theory is combined, it is at branch
In the depressor area of bearing capacity distribution, and combination shaft production data and technical data finally determine the accurate position of stope drift active workings
It sets.
In above scheme, in step (2), water accumulating volume is carried out to original work face goaf and pneumatosis amount detects: in order to prevent
Water inrush accident occurs when tunneling stope drift active workings, water drainage work is carried out to original work face goaf；Gas Outburst in order to prevent
And spontaneous combustion of coal seam, nitrogen and fire retardant are injected to former working face goaf.
In above scheme, in step (2), preferably stop adopting the rear portion original goaf gas where line coal column to super high seam
The method that content carries out comprehensive survey includes physical prospecting, probing, and injects nitrogen in time to disperse goaf gas pernicious gas；It wants
Stop the rear portion original goaf where adopting line coal column to super high seam and inject fire retardant, to prevent super high seam original working face residual floating
Spontaneous combustion of coal seam occurs for coal.
In above scheme, in step (2), preferably stop adopting the rear portion original water in gob area where line coal column to super high seam
The method that amount carries out comprehensive survey includes physical prospecting, probing, changes and visit, will be to white-out goaf product if water in gob area content height
Water.
In above scheme, in step (3), roadside packing tunnel, roadside packing are tunneled in coal seam along super high seam top plate
The trend in tunnel is vertical with former working face track crossheading direction of propulsion, and roadside packing tunnel is arranged in coal seam along roof driving
In, and arranged with coal column second mining working face haulage gate using interior wrong formula, interior wrong distance is 3~5m；The conduct of roadside packing tunnel
The top plate gas drainage under suction lane of coal column second mining working face.
In above scheme, in step (4), preferred coal column second mining working face track crossheading and haulage gate use two-way pick
Into mode, i.e., tunnel from former working face extraction tunnel, then penetrated through in coal column center simultaneously；It is oblique to tunnel return air again later
Air door is simultaneously arranged in former working face track crossheading in lane, forms complete production system, guarantees the safety of coal column second mining working face
Production.
In above scheme, in step (5), the boring procedure are as follows: drilling construction, Kong Zhi are carried out using casing drilling technology
Diameter d is 60~120mm, and pitch of holes L is 10~25m, and hole inclination angle theta is 10 °~60 °, and drilling depth h is by coal seam thickness H and drilling
Inclination angle theta determines.
In above scheme, in step (6), the pressure of preferred filling pump is controlled in 2~6Mpa.
In above scheme, in step (6), fill paste is gangue: flyash: cement: diminishing according to mass percent
Agent: the ratio of water=45% -55%:15% -20%:10% -15%:3% -5%:15% -25%, compound concentration are
75% -85% fill paste.
Beneficial effects of the present invention:
(1) present invention to super high seam by stopping adopting the multiple comprehensive survey of line coal column original goaf progress and take in time suitable
Work as method, effectively prevent the generation of mine safety accident, guarantees that super high seam stops adopting the safe and reliable of line coal column second mining.
(2) present invention passes through the haulage gate and rail using the two-way driving coal column second mining working face in former working face extraction tunnel
Road crossheading is simultaneously penetrated through, can effectively shorten coal column second mining working face stope drift active workings driving the time, and then shorten working face cloth
The time is set, to effectively improve the efficiency of later period production mine.
It is (3) of the invention by arranging working face using former working face extraction tunnel as the eye of cutting of coal column second mining working face,
Reduce the excavation work amount for cutting eye, the effective excavation work amount for shortening coal column second mining working face and driving time.
(4) present invention can be effectively isolated original to coal column second mining working face haulage gate using the method for paste body filling by lane
The pernicious gas and water in gob area in goaf realize the safety in production to coal column second mining working face.
(5) the pressure coal amount for stopping to adopt line coal column The present invention reduces super high seam, reduces the waste of coal resources, sufficiently releases
The potentiality for having put coal resources improve the economic benefit of coal enterprise, alleviate the resource pressure of coal enterprise, extend mine
And the service life in mining area.
Detailed description of the invention
Fig. 1 is that second mining super high seam stops adopting the roadway layout schematic diagram of line coal column method；
Fig. 2 is that second mining super high seam stops adopting the recovery process schematic diagram of line coal column method；
Fig. 3 is the sectional view in Fig. 1 along line A-A；
1 in figure: track return air main entry；2: transport air inlet main entry；3 former working face haulage gates；4: former working face track is suitable
Slot；5: coal column second mining working face track crossheading；6: coal column second mining working face haulage gate；7: return air inclined gallery；8: former working face is adopted
Dead zone；9: coal column second mining working face；10: coal column goaf；11: roadside packing tunnel；12: roadside packing lotion；13: filling pipe
Road.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment 1:
Certain later period produces mine, and coal column coal seam thickness is averaged 13.76m, and working face usually has dedicated top plate gas drainage under suction
Tunnel.Working face stops adopting line coal column and stays that set width be about 230m, and coal column presses coal amount huge.Since to adopt Panel stoping complete by mine master
Finish, now second mining is carried out to panel coal column.
The determination of coal column second mining roadway position.In conjunction with mine shaft geology data, according to country rock limit equilibrium theory, support pressure
The range of distribution simultaneously uses FLAC3DNumerical simulation software determines coal column second mining working face extraction tunnel (coal column second mining working face fortune
Defeated crossheading 6 and coal column second mining working face track crossheading 5) rational position range of choice, later true according to shaft production data
Determine the specific location in coal column second mining working face extraction tunnel.
Original work face goaf 8 carries out water accumulating volume and pneumatosis amount detects.Gushing water occurs when tunneling stope drift active workings in order to prevent
Accident will carry out water drainage work to original work face goaf；Gas Outburst and spontaneous combustion of coal seam in order to prevent, be to former working face
Nitrogen and fire retardant are injected in goaf.
The driving in roadside packing tunnel 11.Roadside packing tunnel 11 is tunneled in coal seam along super high seam top plate, tunnel
Trend is vertical with former working face track 4 direction of propulsion of crossheading, wrong in tunnel and coal column second mining working face haulage gate 6 to arrange, interior
The horizontal distance of mistake distance 5m(, that is, roadside packing tunnel 11 position and coal column second mining working face haulage gate 6 is 5m, only
But not in same layer position, roadside packing tunnel 11 is along coal for roadside packing tunnel 11 and coal column second mining working face haulage gate 6
Layer top plate driving, and coal column second mining working face haulage gate 6 is tunneled along seat earth), which also can be used as coal column joint
The top plate gas drainage under suction lane of second mining working face.
The driving in coal column second mining working face extraction tunnel.From former working face extraction tunnel 3, former crossheading 4 pairs, working face track
It to driving coal column second mining working face track crossheading 5 and coal column second mining working face haulage gate 6 and penetrates through, it is oblique to tunnel return air again later
Air door is simultaneously arranged in former working face track crossheading in lane 7, so that forming complete production system, guarantees coal column second mining working face
Safety in production.
The arrangement of filling piping.Using casing drilling technology carry out drilling construction, bore dia d be 100mm, pitch of holes (for
Horizontal distance between two neighboring drilling, i.e. drilling horizontal spacing) L be 20m, hole inclination angle theta be 39 °, drilling depth h(be bore
The actual depth in hole is illustrated as bore inclining length, and the vertical range of non-drilled in Fig. 3) it is 12.8m.
The roadside packing of coal column second mining working face haulage gate.It is gangue: flyash: cement according to mass percent:
Water-reducing agent: water=50%:15%:15%:5%:15% ratio, compound concentration are 80% fill paste, and pass through filling
Pipeline carries out roadside packing to coal column second mining working face haulage gate, and condenses it sufficiently.
Former working face track crossheading 4 arranges that mining device, second mining super high seam stop adopting line coal column.Super high seam is stopped to adopt line
Coal column implements longwall top coal caving, realizes the recycling for stopping to adopt line coal column to later period production mine, reduces the waste of coal resources, improve
The economic benefit of coal enterprise, alleviates the resource pressure of coal enterprise, extends the service life in mine and mining area.
As shown in Fig. 2, being exploited using former working face track crossheading 4 as coal column second mining working face 9.
Each Main production Systems of working face are as follows:
(1) coal column second mining working face transporting coal system:
Former working face track crossheading 4(coal column second mining working face 9) → coal column second mining working face haulage gate 6 → original working face
Main entry 2 is entered the wind in haulage gate 3 → transport
(2) coal column second mining working face transportation system:
Track return air 1 → return air of main entry inclined gallery 7 → coal column second mining working face track crossheading 5 → original working face track crossheading 4
(coal column second mining working face 9)
(3) coal column second mining face-airing system:
Transport air inlet main entry 2 → original working face haulage gate 3 → coal column second mining working face haulage gate 6 → original working face rail
Road crossheading 4(coal column second mining working face 9) → coal column second mining working face track 5 → return air of crossheading inclined gallery 7 → track return air main entry 1.
In figure:Represent transporting coal direction:Represent haul direction；Represent air inlet direction；Represent return air direction.
Claims (10)
1. a kind of second mining super high seam stops the method for adopting line coal column, it is characterised in that: the following steps are included:
(1) the original geologic information of mine, technical data, the means of production are combined, simulates coal column second mining work with numerical simulation software
Make the position of face haulage gate Yu track crossheading；
(2) former work face goaf where adopting line coal column is stopped to super high seam and carries out comprehensive survey, exclude existing security risk,
To reach safety in production；
(3) according to mine shaft geology data, a tunnel along coal column second mining advance of the face direction is tunneled on super high seam top,
As roadside packing tunnel；
(4) coal column second mining working face extraction tunnel and attached inclined gallery are tunneled and form it into complete production system, arrangement coal column is multiple
Mining face；
(5) it in the tunnel that step (3) is dug, from top to bottom drills in roadway floor, which is that super high seam stops adopting line coal
The filling piping of column second mining working face haulage gate；
(6) fill paste is prepared, the lotion prepared is uniformly injected by filling piping under the action of filling pump along step (5)
Coal column second mining working face haulage gate condenses it sufficiently close to the side of former work face goaf；
(7) longwall top coal caving equipment is arranged in former working face track crossheading, coal column second mining working face carries out longwall top coal caving.
2. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: excellent in step (1)
The numerical simulation software of choosing is FLAC3D, reasonable stope drift active workings position is determined by simulation, and country rock limiting equilibrium is combined to manage
By being in the depressor area of abutment pressure distribution range, and shaft production data and technical data is combined finally to determine back
Adopt the accurate location in tunnel.
3. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: right in step (2)
Original work face goaf carries out water accumulating volume and pneumatosis amount detects: water inrush accident occurs when tunneling stope drift active workings in order to prevent, it is right
Original work face goaf carries out water drainage work；Gas Outburst and spontaneous combustion of coal seam in order to prevent, be to former working face goaf
Enter nitrogen and fire retardant.
4. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: excellent in step (2)
Choosing stop adopting line coal column to super high seam where the rear portion original goaf gas content method that carries out comprehensive survey include physical prospecting,
Probing, and inject nitrogen in time to disperse goaf gas pernicious gas；Super high seam is stopped to adopt the rear portion where line coal column
Fire retardant is injected in former goaf, to prevent super high seam original working face residual float coal from spontaneous combustion of coal seam occurs.
5. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: excellent in step (2)
The method that the rear portion original water in gob area amount where adopting line coal column carries out comprehensive survey of stopping to super high seam of choosing includes physical prospecting, bores
It visits and changes and visit, it will be to white-out water in gob area if water in gob area content height.
6. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: in step (3), edge
Super high seam top plate tunnels roadside packing tunnel, roadside packing tunnel trend and former working face track crossheading propulsion side in coal seam
To vertical, roadside packing tunnel is arranged in coal seam along roof driving, and is used with coal column second mining working face haulage gate
Interior mistake formula arrangement, interior wrong distance is 3~5m；Top plate gas drainage under suction lane of the roadside packing tunnel as coal column second mining working face.
7. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: excellent in step (4)
The coal column second mining working face track crossheading and haulage gate of choosing are by the way of two-way driving, i.e., same from former working face extraction tunnel
When tunnel, then penetrated through in coal column center；It tunnels return air inclined gallery again later and arranges wind in former working face track crossheading
Door forms complete production system, guarantees the safety in production of coal column second mining working face.
8. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: in step (5), institute
State boring procedure are as follows: using casing drilling technology carry out drilling construction, bore dia d be 60~120mm, pitch of holes L be 10~
25m, hole inclination angle theta are 10 °~60 °, and drilling depth h is determined by coal seam thickness H and dip angle of hole θ.
9. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: excellent in step (6)
The pressure of the filling pump of choosing is controlled in 2~6Mpa.
10. second mining super high seam according to claim 1 stops the method for adopting line coal column, it is characterised in that: in step (6),
Fill paste is gangue: flyash: cement: water-reducing agent: water=45% -55%:15% -20% according to mass percent:
The ratio of 10% -15%:3% -5%:15% -25%, the fill paste that compound concentration is 75% -85%.
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| CN108518222B (en) * | 2018-03-14 | 2019-06-11 | 太原理工大学 | Paste body filling combination top plate presplitting second mining super high seam stops the method for adopting line coal column |
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