CN109403974A - A kind of mine, which picks up, unloads pumping and fills lasting exploit design method - Google Patents
A kind of mine, which picks up, unloads pumping and fills lasting exploit design method Download PDFInfo
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- CN109403974A CN109403974A CN201811157764.6A CN201811157764A CN109403974A CN 109403974 A CN109403974 A CN 109403974A CN 201811157764 A CN201811157764 A CN 201811157764A CN 109403974 A CN109403974 A CN 109403974A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
Pumping is unloaded the invention discloses a kind of selecting of mine and fills lasting exploit design method, and the crack in layer with protected seam, realization protected seam gas release are increased by exploitation total rock up-protective layer first；To underground bastard coal washing system, the good spoil of washing is stored to waste bin the high percentage of shale content raw coal transportation that protective coat extracted is generated simultaneously；Then gas drainage system is arranged in protective layer, protected seam, realizes that low the safe and efficient of ventilative high gas layer is adopted altogether；Finally the spoil being stored in waste bin is transported to the mixed mining face of protected seam overlength and carrys out bashing.This method efficiently solves the gas preventing and control problem in high methane low-permeability coal seam; it prevents spoil ground discharge environmental pollution and destroys; improve the rate of recovery of mine resource recovery ratio and coal measures associated resources; it has widened protective layer and has opened technology and solid filling coal-mining method application range, it can be to provide important technological borrowing with the condition pit mining.
Description
Technical field
Pumping is unloaded the present invention relates to a kind of selecting of mine and fills lasting exploit design method, is particularly suitable for driving face and is gone out cash
Amount is big or coal working face percentage of shale content is higher, while high methane low-permeability coal seam needs the mine of release mash gas extraction, belongs to
Coal mining technology field.
Background technique
It is growing as coal in China is production-scale, pit mining is horizontal constantly to be extended, high methane low-permeable coal
The ratio of layer gradually expands, and the coal seam that the highly gassy mine in 95% or more China is exploited belongs to low air permeability coal seam, gas permeability
Coefficient only has 10-3~10-4MD, i.e. 0.04~0.004m2/(MPa2D), permeability coefficient is respectively less than 0.1m2/(MPa2D),
Most mine coal seams, which belong to, is difficult to extraction coal seam, for not having the coal seam of exploitation protective layer condition, how to solve new shape
The anti-reflection problem of release under gesture improves mine gas extraction rate, realizes that coal is adopted altogether with gas highly effective and safe, it has also become safety of coal mines
The problem of production.Currently, exploitation high methane low permeability coal seam common method be first adopt protective layer carry out gas release extraction, then
Protected seam is adopted, this method is limited in that: first is that the layer position of claimed layer and protected seam is relatively reasonable；Second is that protection
Layer is mostly coal seam or thin dirt band coal seam, if practical high methane low permeability coal seam and upper and lower coal seam spacing be larger or spacing conjunction
Reason, but protective layer is thick dirt band or total rock layer, then does not have traditional sense up-protective layer mining conditions, high methane is hypotonic at this time
Saturating seam mining needs the problem solved is how to design or choose protective layer.If selecting thick dirt band or total rock layer for protection
Layer then needs the underground separation and gangue treatment that further solve the problems, such as few more cash coal stream spoils of coal.
Summary of the invention
In order to overcome various deficiencies of the existing technology, the present invention, which provides a kind of mine and picks up to unload pumping and fill lasting exploit, to be set
Meter method improves the rate of recovery of coal and associated resources, and downhole gangue is effectively treated, and reduces the discharge of spoil ground and makes to mining area ring
Border pollution and destruction, increase mine service-life, have widened protective coat extracted technology and solid filling coal-mining method application model
It encloses.
To solve the above-mentioned problems, a kind of mine of the present invention, which picks up, unloads pumping and fills lasting exploit design method, which is characterized in that
Design cycle is as follows:
The first step passes through and analyzes nearly total rock protective layer coal seam thickness and layer column pitch distribution characteristics, comprehensive in protection layer arrangement
Mining face realizes nearly total rock protective coat extracted；Under the mining influence of protective coat extracted, increase protective layer and protected seam it
Between crack in layer increase the permeability coefficient of gas so that the gas of coal seam attachment becomes the gas of free state, it is real
The gas release of existing protected seam.
The high percentage of shale content raw coal that second step, protective coat extracted generate is transported inclined gallery and is transported to redoiming conveyor, and by turning
It carries conveyer to transport to underground bastard coal washing system, the spoil sub-elected through bastard coal washing system is stored to waste bin；
Third step is respectively arranged gas drainage system in protective layer and protected seam, is drilled by concordant and wears layer brill
Hole carries out gas drainage under suction；
4th step is protected the synchronous transport of the spoil being stored in waste bin to underliing while carrying out gas drainage
Layer overlength mixes mining face, carries out solid filling to goaf while protected seam is exploited.
Further, in the first step, nearly total rock protective coat extracted is to be combined using explosion presplitting with fully mechanized mining broken rock technique
Method.
Further, in second step, bastard coal washing system uses shallow slot dense medium method for separating, and process flow is as follows:
The raw coal of working face output pass through first three product roller pickers carry out screening process, by raw coal be divided into less than 13mm,
13~250mm and be greater than tri- kinds of partial size ranks of 250mm；Screenings less than 13mm as cleaned coal with main conveying system gug, greatly
Enter downhole gangue storehouse through Stady On The Auxiliary Transportation Systems as spoil in the oversize of 250mm, object enters dense medium in the sieve of 13~250mm
Matter shallow-tank separator carry out sorting process, the cleaned coal selected by de-mediated, coal slime through coal slime processing system processing after together with it is small
It mixes in the screenings of 13mm through main conveying system gug；The spoil selected is mixed with the oversize greater than 250mm after de-mediated
Waste bin is transported to after conjunction together for hybrid working face filling section filling.
Shallow slot dense medium method for separating sorting capability is big, precision is higher, sorting particle size range is wide, and discharge refuse ability is strong.It is more applicable
In the high raw coal separation of percentage of shale content.
Further, gas drainage system arrangement, which is taken, wears the extractions form such as layer and goaf, wears layer extraction form and uses
Along top plate move towards layer-through drilling take out in advance and it is lower taken out in advance to layer-through drilling, goaf extraction form use pipe laying extraction；Specific steps
It is as follows:
(a) layer-through drilling is moved towards along top plate to take out in advance: adopting face side construction top plate in lower air inlet and move towards layer-through drilling, for taking out
It adopts through exploiting protective layer, loss to protective layer adopts face gas out of underlying seam fissure zone；
(b) take out in advance under to layer-through drilling: in the case where lower air inlet adopts the construction of face side to a layer pre-draining borehole is worn, drill borehole bottom location
It at least penetrates coal seam 0.5m, pre-mining drainage protected seam coal seam and adjacent layer gas pressure relief and adopts rear pumping and mining pressure relief mash gas；
(c) goaf pipe laying extraction: in view of a large amount of high concentrations watt are gathered on gob side entry retaining Y-shaped ventilation goaf top
This guarantees that the production of working face essential safe type, design are being stayed in the obturation of lane at interval of one to guarantee higher gas drainage rate
Set a distance buries one group of gas drainage pipe, lays to western wing return air along lower air inlet, goes down the hill extraction main pipe with western wing return air
Connection carries out extraction by Beishan Mountain ground extraction pumping plant, realizes the pipe laying extraction of goaf high concentration gas.
After the abundant release of first step protected seam gas, the gas drainage under suction system that is arranged between protective layer and protected seam
The gas drainage under suction that system can will be enriched between protective layer and protected seam is protected for next step rock stratum protective layer and low ventilative high methane
The safe and efficient of sheath adopts offer condition altogether.
Further, in the 4th step, protected seam overlength mixes mining face and is divided into filling section, changeover portion and is caving section,
According to the spoil amount that bastard coal separation system sorts out, design protected seam overlength mixes mining face and fills segment length, and arrangement is filled
Fill out a section stope, and carry out lectotype selection with it is mating；According to the size of mine capacity, protected seam overlength is filled in design
Mixed mining face is caving segment length, and arrangement is caving a section stope, and carry out lectotype selection with it is mating；Changeover portion, which is arranged in, to be filled
It fills out section and is caving between section, and carry out lectotype selection and mating, Leather Belt Conveyance of the coal produced through transportation roadway side
It is sorted to bastard coal washing system；The fortune cash that washing spoil in underground passes sequentially through batcher from waste bin, arranges in track lane
Rubber conveyer, automatic moving type redoiming conveyor are transported on the porous bottom-dump conveyer for being suspended on top beam rear portion, in certain sequence
Dumping pit on the porous bottom-dump conveyer in open fill section rear portion makes spoil nature blanking be filled and be tamped to goaf.
The present invention passes through the crack in layer of exploitation total rock up-protective layer increase and protected seam first, realizes protected seam watt
This release；Simultaneously by the high percentage of shale content raw coal transportation of protective coat extracted generation to underground bastard coal washing system, the good spoil of washing
It stores to waste bin；Then gas drainage system is arranged in protective layer, protected seam, realizes the peace of low ventilative high gas layer
Overall height effect is adopted altogether；Finally the spoil being stored in waste bin is transported mined out to fill to the mixed mining face of protected seam overlength
Area.Make thick dirt band protective layer or total rock layer protective layer and protected seam by " adopting ", " choosing ", " unloading ", " pumping ", " filling " work compound
Between gas be able to effective extraction, solve the projecting coal bed gas preventing and control problem of high methane low-permeability；Realize spoil
Gug does not directly carry out coal-gangue separation and by isolated waste filling in goaf in underground, saves bastard coal promotion and traffic expense
With, prevent spoil ground discharge environmental pollution and destroy；Realize high percentage of shale content Protective Coal Seam and low ventilative high methane protective layer
Unitized production improves the rate of recovery of mine resource recovery ratio and coal measures associated resources, increases mine service-life, widens
Protective layer opens technology and solid filling coal-mining method application range, can be to provide important technology with the condition pit mining
It uses for reference.
Detailed description of the invention
Fig. 1 is integrated perspective view of the invention；
Fig. 2 is nearly total rock protective layer fully-mechanized mining working layout drawing of the invention；
Fig. 3 is that nearly total rock protective layer of the invention realizes the anti-reflection schematic diagram of gas release；
Fig. 4 is that overlength solid filling of the invention and traditional fully mechanized mining mix mining face layout drawing；
Fig. 5 be in Fig. 4 A-A to filling section working face layout drawing；
Fig. 6 is B-B direction changeover portion working face layout drawing in Fig. 4；
Fig. 7 be in Fig. 4 C-C to filling section working face layout drawing；
Fig. 8 is that the more cash efficient separation system process figures of coal are lacked in underground of the invention；
Fig. 9 is low permeability coal seam gas drainage system layout drawing of the invention.
In figure: 1, protective layer fully-mechanized mining working, 2, protected seam overlength mix mining face, 3, transport inclined gallery, 4, reprint it is defeated
Send machine, 5, coal stream spoil washing system, 6, waste bin, 7, Separator of heavy medium shallow slot, 8, spoil haulage way, 9, track lane,
10, concordant drills, 11, layer-through drilling, 12, coal mining hydraulic support, 13, porous bottom-dump conveyer.
Specific embodiment
The present invention is described in detail in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, a kind of mine, which picks up, unloads pumping and fills lasting exploit design method, and design cycle is as follows:
The first step passes through and analyzes nearly total rock protective layer coal seam thickness and layer column pitch distribution characteristics, comprehensive in protection layer arrangement
Mining face 1 realizes nearly total rock protective coat extracted；Nearly total rock protective coat extracted is using explosion presplitting and fully mechanized mining broken rock technique phase
In conjunction with method.Depth of stratum is in 0.6m or less, and using fully-mechanized mining equipment broken rock, depth of stratum passes through rock in 0.6m or more
Vibration big gun presplitting is put in layer punching, will thicker and complete crushing rock formation, recycle coalcutter to be cut, adopted during mining
Coal hydraulic bracket 12 is whole to carry out supporting.
As shown in figure 3, the interlayer increased between protective layer and protected seam is split under the mining influence of protective coat extracted
Gap increases the permeability coefficient of gas so that the gas of coal seam attachment becomes the gas of free state, realizes protected seam
Gas release.
As shown in Figure 1, second step, protective coat extracted generate high percentage of shale content raw coal through transport inclined gallery 3 be transported to reprint it is defeated
Machine 4 is sent, and by the transport of redoiming conveyor 4 to underground bastard coal washing system 5, the spoil storage sub-elected through bastard coal washing system 5
To waste bin 6；
As shown in figure 8, bastard coal washing system 5 uses shallow slot dense medium method for separating in the present embodiment, process flow is as follows:
The raw coal of working face output pass through first three product roller pickers carry out screening process, by raw coal be divided into less than 13mm,
13~250mm and be greater than tri- kinds of partial size ranks of 250mm；Screenings less than 13mm as cleaned coal with main conveying system gug, greatly
Enter downhole gangue storehouse through Stady On The Auxiliary Transportation Systems as spoil in the oversize of 250mm, object enters dense medium in the sieve of 13~250mm
Matter shallow-tank separator 7 carry out sorting process, the cleaned coal selected by de-mediated, coal slime through coal slime processing system processing after together with it is small
It mixes in the screenings of 13mm through main conveying system gug；The spoil selected is mixed with the oversize greater than 250mm after de-mediated
Waste bin is transported to after conjunction together for hybrid working face filling section filling.
Shallow slot dense medium method for separating sorting capability is big, precision is higher, sorting particle size range is wide, and discharge refuse ability is strong.It is more applicable
In the high raw coal separation of percentage of shale content.
As shown in Figure 1, third step, in protective layer and protected seam being respectively arranged gas drainage system, bored by concordant
Hole 10 and layer-through drilling 11 carry out gas drainage under suction；
As shown in figure 9, gas drainage system arrangement is taken and wears layer and two kinds of goaf extraction form, wears a layer extraction form and adopt
With along top plate move towards layer-through drilling take out in advance and it is lower taken out in advance to layer-through drilling, goaf extraction form use pipe laying extraction；Specific step
It is rapid as follows:
(a) layer-through drilling is moved towards along top plate to take out in advance: adopting face side construction top plate in lower air inlet and move towards layer-through drilling, for taking out
It adopts through exploiting protective layer, loss to protective layer adopts face gas out of underlying seam fissure zone；
(b) take out in advance under to layer-through drilling: in the case where lower air inlet adopts the construction of face side to a layer pre-draining borehole is worn, drill borehole bottom location
It at least penetrates coal seam 0.5m, pre-mining drainage protected seam coal seam and adjacent layer gas pressure relief and adopts rear pumping and mining pressure relief mash gas；
(c) goaf pipe laying extraction: in view of a large amount of high concentrations watt are gathered on gob side entry retaining Y-shaped ventilation goaf top
This guarantees that the production of working face essential safe type, design are being stayed in the obturation of lane at interval of one to guarantee higher gas drainage rate
Set a distance buries one group of gas drainage pipe, lays to western wing return air along lower air inlet, goes down the hill extraction main pipe with western wing return air
Connection carries out extraction by Beishan Mountain ground extraction pumping plant, realizes the pipe laying extraction of goaf high concentration gas.
After the abundant release of first step protected seam gas, the gas drainage under suction system that is arranged between protective layer and protected seam
The gas drainage under suction that system can will be enriched between protective layer and protected seam is protected for next step rock stratum protective layer and low ventilative high methane
The safe and efficient of sheath adopts offer condition altogether.
As shown in Figure 1, the 4th step, transports the spoil being stored in waste bin 6 through spoil while carrying out gas drainage
The synchronous transport in defeated lane 8 to the protected seam overlength that underlies mixes mining face 2, carries out solid to goaf while protected seam is exploited
It fills, filling coal mining hydraulic support carries out supporting to top plate in stowing operation.
As shown in Figures 4 to 7, protected seam overlength mixes mining face and is divided into filling section, changeover portion and is caving section, foundation
The spoil amount that bastard coal separation system sorts out, design protected seam overlength mix mining face and fill segment length, arrangement filling section
Stope, and carry out lectotype selection with it is mating；According to the size of mine capacity, design fills that protected seam overlength is mixed to adopt
Working face is caving segment length, and arrangement is caving a section stope, and carry out lectotype selection with it is mating；Changeover portion is arranged in filling section
Be caving between section, and carry out lectotype selection and mating, Leather Belt Conveyance of the coal produced through transportation roadway side to coal
Cash washing system is sorted；The fortune cash adhesive tape that washing spoil in underground passes sequentially through batcher from waste bin, arranges in track lane
Conveyer, automatic moving type redoiming conveyor are transported on the porous bottom-dump conveyer 13 for being suspended on top beam rear portion, are beaten in certain sequence
The dumping pit opened on the filling porous bottom-dump conveyer 13 in section rear portion makes spoil nature blanking be filled and be tamped to goaf.
Claims (5)
1. a kind of mine selecting unloads pumping and fills lasting exploit design method, which is characterized in that design cycle is as follows:
The first step passes through and analyzes nearly total rock protective layer coal seam thickness and layer column pitch distribution characteristics, in protection layer arrangement fully mechanized mining work
Make face and realizes nearly total rock protective coat extracted；
The high percentage of shale content raw coal that second step, protective coat extracted generate is transported inclined gallery and is transported to redoiming conveyor, and defeated by reprinting
Machine is sent to transport to underground bastard coal washing system, the spoil sub-elected through bastard coal washing system is stored to waste bin；
Third step is respectively arranged gas drainage system in protective layer and protected seam, by concordant drilling and layer-through drilling into
Row gas drainage under suction；
4th step surpasses the synchronous transport of the spoil being stored in waste bin to the protected seam that underlies while carrying out gas drainage
Long mixed mining face, carries out solid filling to goaf while protected seam is exploited.
2. mine selecting according to claim 1 unloads pumping and fills lasting exploit design method, which is characterized in that in the first step,
Nearly total rock protective coat extracted is the method combined using explosion presplitting with fully mechanized mining broken rock technique.
3. mine selecting according to claim 1 or 2 unloads pumping and fills lasting exploit design method, which is characterized in that second step
In, bastard coal washing system uses shallow slot dense medium method for separating, and process flow is as follows:
The raw coal of working face output pass through first three product roller pickers carry out screening process, by raw coal be divided into less than 13mm, 13~
250mm and be greater than tri- kinds of partial size ranks of 250mm；Screenings less than 13mm, with main conveying system gug, is greater than as cleaned coal
The oversize of 250mm enters downhole gangue storehouse through Stady On The Auxiliary Transportation Systems as spoil, and object enters dense media in the sieve of 13~250mm
Shallow-tank separator carry out sorting process, the cleaned coal selected by de-mediated, coal slime through coal slime processing system processing after together be less than
The screenings of 13mm is mixed through main conveying system gug；The spoil selected mixes after de-mediated with the oversize greater than 250mm
Waste bin is transported to together afterwards for hybrid working face filling section filling.
4. mine selecting according to claim 1 or 2 unloads pumping and fills lasting exploit design method, which is characterized in that gas is taken out
Place system arrangement is taken and wears layer and two kinds of goaf extraction form, and layer extraction form of wearing, which is used, to be moved towards layer-through drilling along top plate and take out in advance
It is taken out in advance with lower to layer-through drilling, extraction form in goaf uses pipe laying extraction；Specific step is as follows:
(a) layer-through drilling is moved towards along top plate to take out in advance: adopting face side construction top plate in lower air inlet and move towards layer-through drilling, be used to extraction and pass through
Protective layer is exploited, loss to protective layer adopts face gas out of underlying seam fissure zone；
(b) take out in advance under to layer-through drilling: in the case where lower air inlet adopts the construction of face side to a layer pre-draining borehole is worn, drilling borehole bottom location is at least
It penetrates coal seam 0.5m, pre-mining drainage protected seam coal seam and adjacent layer gas pressure relief and adopts rear pumping and mining pressure relief mash gas；
(c) goaf pipe laying extraction: in view of a large amount of high concentration gas are gathered on gob side entry retaining Y-shaped ventilation goaf top, it is
Guarantee higher gas drainage rate, guarantees that the production of working face essential safe type, design are being stayed in the obturation of lane at interval of a spacing
It from embedded one group of gas drainage pipe, lays to western wing return air along lower air inlet, be connect with western wing return air extraction main pipe of going down the hill,
Extraction is carried out by Beishan Mountain ground extraction pumping plant, realizes the pipe laying extraction of goaf high concentration gas.
5. mine selecting according to claim 1 or 2 unloads pumping and fills lasting exploit design method, which is characterized in that the 4th step
In, protected seam overlength mixes mining face and is divided into filling section, changeover portion and is caving section, sorts out according to bastard coal separation system
Spoil amount, design protected seam overlength mixes mining face and fills segment length, and arrangement filling section stope and carries out equipment
Type selecting with it is mating；According to the size of mine capacity, design fills the mixed mining face of protected seam overlength and is caving segment length, arranges
Be caving a section stope, and carry out lectotype selection with it is mating；Changeover portion is arranged in filling section and is caving between section, and is set
Alternative type with it is mating, Leather Belt Conveyance of the coal produced through transportation roadway side to bastard coal washing system is sorted；Well
Lower washing spoil passes sequentially through batcher, the fortune cash rubber conveyer arranged in track lane, automatic moving type from waste bin and reprints conveying
Machine is transported on the porous bottom-dump conveyer for being suspended on top beam rear portion, and the porous bottom-dump in open fill section rear portion is defeated in certain sequence
Send the dumping pit on machine that spoil nature blanking is made to be filled and be tamped to goaf.
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| CN201811157764.6A CN109403974A (en) | 2018-09-30 | 2018-09-30 | A kind of mine, which picks up, unloads pumping and fills lasting exploit design method |
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| CN111520156A (en) * | 2020-04-30 | 2020-08-11 | 中国矿业大学 | Energy-gathering jet rock breaking and fluidization carrying system and method |
| CN112412459A (en) * | 2020-12-17 | 2021-02-26 | 贵州大学 | Special strip type filling mining method |
| CN113339057A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer-crossing subsequent filling coal mining system and method |
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| CN114483163A (en) * | 2022-02-11 | 2022-05-13 | 中国矿业大学 | Gas extraction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520156A (en) * | 2020-04-30 | 2020-08-11 | 中国矿业大学 | Energy-gathering jet rock breaking and fluidization carrying system and method |
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| CN112412459A (en) * | 2020-12-17 | 2021-02-26 | 贵州大学 | Special strip type filling mining method |
| CN112412459B (en) * | 2020-12-17 | 2022-07-12 | 贵州大学 | Special strip type filling mining method |
| CN113339057A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer-crossing subsequent filling coal mining system and method |
| CN113389597A (en) * | 2021-07-29 | 2021-09-14 | 安徽理工大学 | Comprehensive utilization system and application method for coal gangue in resource co-associated mining area |
| WO2023005931A1 (en) * | 2021-07-29 | 2023-02-02 | 安徽理工大学 | Coal gangue comprehensive utilization system for associated-resource mining area, and application method for system |
| CN113653491A (en) * | 2021-10-21 | 2021-11-16 | 煤炭科学研究总院 | Underground rock burst prevention and control method for coal seam group |
| CN113653491B (en) * | 2021-10-21 | 2022-01-14 | 煤炭科学研究总院 | Underground rock burst prevention and control method for coal seam group |
| CN114483163A (en) * | 2022-02-11 | 2022-05-13 | 中国矿业大学 | Gas extraction method |
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