CN108506037A - Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method - Google Patents
Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 60
- 239000003245 coal Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005086 pumping Methods 0.000 title claims abstract description 32
- 238000005065 mining Methods 0.000 title claims abstract description 27
- 238000000605 extraction Methods 0.000 claims abstract description 41
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000003795 desorption Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000003325 tomography Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Classifications
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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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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Abstract
The invention discloses a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining methods.Its principle is before working face extraction, pass through the high-order directional long borehole group moved towards along working face that constructs in working face air return way, make to extend in the goaf "O"-ring fissure zone that the main aperture section of each High Position Drilling formed after working face extraction, and the next drilling is made suitably to sink close to working face location of starting cut, wear a layer branched hole what upper drilling construction was faced upward, using each drilling combination extraction working face adopt afterwards air guide fissure zone and release solution suction belt Neva this.This method can play a dual role of reducing in face upper corner angle and return high concentration gas in gas density, and extraction goaf release solution suction belt, reach face gas improvement, realize the purpose of gas resourcesization recycling.
Description
Technical field
The present invention relates to a kind of gas pumping methods, belong to coal mine gas improvement and gas pumping field, specifically relate to
And a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method.
Background technology
China's coal field geology complicated condition, easily causes all kinds of serious accidents, wherein with coal association and preservation in coal
Gas in layer is one of the maximum Flood inducing factors for threatening China's coal-mine safety.Meanwhile gas is a kind of clean, efficient again
The energy, if these gas resources are carried out effective extraction, it will alleviate the situation of China's energy shortage significantly.Therefore, no matter
For collateral security mine safety production or the angle of the utilization of resources, should all extraction be carried out to coal mine gas.
When coal mining, the reasons such as density due to air intake and return differential pressure action, and containing gas air is smaller,
Goaf gushes out gas and is easily gathered in face upper corner angle, so that upper corner is become goaf high concentration gas and concentrates the ground gushed out
Point.Therefore gas at upper corner improvement is the emphasis of carrying out gas control on coal faces, and solves the aggregation of working face local gas, surpasses
Limit and the key for reducing working face return air gas.
For face upper corner angle gas accumulation problem, suction road, return air pipe laying, high-order drill site top plate are mostly used at present and is bored
The getting working faces such as hole and ground minery L-type well or goaf gas extraction technology achieve certain gas control effect
Fruit, but there is also many problems.Suction road excavation work amount is big, and long construction period is costly；The pipeline of return air pipe laying is easy quilt
It is crushed across the overlying strata fallen, gas drainage results are bad；High-order drill site top plate drilling need to construct high-order drill site, and drilling track is uncontrollable, nothing
Method ensures that drilling track extends in fissure zone；Ground minery L-type well construction difficulty is big, and of high cost, execution conditions are by landform
Landforms influence.
In addition, work on hand face goaf gas pumping method generally can only gas in extraction goaf air guide fissure zone,
The part gas is mixed with the large quantity of air of face-airing importing, and institute's mash gas extraction is difficult to realize recycling.And it is leading
There are release solution suction belt in a certain range above gas checking gap band, within the scope of this based on bedseparated fissures, gas also obtains certain journey
The desorption of degree can be flowed along concordant direction.Due to wearing a layer crack agensis, gas pressure relief cannot or only minimal amount can be rushed to down
Working face, therefore be not that mine gas prevention and control is of interest, but for resource reclaim, this part gas is due to hardly by work
Make the influence of face draft, concentration is higher, and field data shows that this part rock stratum coal seams gas discharging quantity is larger, especially release
Suction belt release solution suction belt memory is solved at coal seam, desorption of mash gas amount is considerable, therefore recycles angle, this part from gas resourcesization
Gas belongs to high-quality mining resources, should in due course be exploited by the influence of mining activity.
Invention content
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that being set in mash gas pumping drilling
Timing take into consideration working face overlying strata movement failure law, provide it is a kind of using directional long borehole group's extraction work face goaf cover
The method of rock gas.This method can play gas density and extraction goaf in reduction face upper corner angle and return and unload
The double action of high concentration gas, reaches coal mine gas improvement, turns waste into wealth in pressure solution suction belt, realizes that gas resourcesization are returned
The purpose of receipts, while face gas treatment cost can be greatly reduced, shorten and administers the period.
The above-mentioned technical problem of the present invention is mainly to be addressed by following technical proposals：
A kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, including：
Drilling construction step, construct the directional long borehole group moved towards along working face before coal working face back production, makes described
The High Position Drilling main aperture section of directional long borehole group extends in the goaf "O"-ring fissure zone formed after working face extraction；
Gas pumping step starts to provide negative pressure extraction watt in aperture when working face extraction is influenced to drilling borehole bottom location
This.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, it is described fixed
Each drilling to long drilled holes group is distributed in the vertical direction on the different layers position of working face goaf fissure zone.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, it is described fixed
To long drilled holes, group includes：
First directional long borehole, be located at the directional long borehole group in lower section, for changing adopt, goaf gas stream
To avoiding gas from entering face upper corner angle；It specifically includes：With the nearly horizontal segment (12) of coal seam parallel arrangement, it is respectively arranged at
The sinking section (13) and section of facing upward (11) of horizontal segment (12) front end and rear end；The sinking section (13) starts from working face first weighting
Place, sinks down into and passes through working face base object model.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, it is described fixed
To long drilled holes, group includes：
Second directional long borehole is located at the middle layer position of the directional long borehole group, is used for extraction roof fracture band gas,
It specifically includes：The nearly horizontal segment (22) being arranged in parallel with coal seam, and it is set to the section of facing upward of nearly horizontal segment (22) rear end
(21), nearly horizontal segment (22) borehole bottom location away from working face open-off cut eye distance from the half for working face First Weighting Interval of Main.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, it is described fixed
To long drilled holes, group includes：
Third directional long borehole is located at the upper layer position of the directional long borehole group, is mainly used for pumping and mining pressure relief solution suction belt
Interior high concentration gas, specifically includes：
It is arranged in parallel with coal seam and borehole bottom location is located at the nearly horizontal segment at working face first weighting；From nearly horizontal segment rear end
Branch is formed and borehole bottom location is opened upwards in turn is located at face upward Chuan Ceng branch hole section of the working face release desorption with coboundary；Its
In, the projection of the Chuan Ceng branches hole section on coal seam of facing upward is overlapped.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, by work
Working face across pitch is divided into several sections by face according to tomography, coal seam fluctuating inflection point etc., and every section orients jumping chisel in top board construction respectively
Kong Qun is segmented mash gas extraction.
Preferably, above-mentioned a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, only by
Sinking section is arranged in the lowermost position drilling borehole bottom location of nearly working face open-off cut eye, and each effective hole section of group that drills is pushed to adopt in working face on direction
Projection need to be overlapped mutually.
Therefore, the present invention has the following advantages：
1, this method can substitute other working face overburden of the goaf gas pumping methods such as suction road, avoid suction road pick
Into；Gas at upper corner method is administered with conventional hole pumping and mining to compare, this method drilling construction quantities is small, short construction period, bores
Hole utilization rate is high, and construction cost is low, and drilling track is controllable in real time, can guarantee that drilling main aperture section is formed after working face extraction always
"O"-ring fissure zone in extend, branch's hole section, which is faced upward, passes through release solution suction belt, realizes accurate extraction.
2, this method not only can gas in extraction work face goaf air guide fissure zone, and can be in pumping and mining pressure relief solution suction belt
Gas, playing reduces in face upper corner angle and return high concentration in gas density and extraction goaf release solution suction belt
The double action of gas can be improved the desorption degree of release solution suction belt gas, improve gas under lasting gas pumping effect
Extraction speed and total amount improve resource recovery, reach coal mine gas improvement, turn waste into wealth, and realize that gas resourcesization are returned
The purpose of receipts.
3, this method gas pumping effect is good, effectively just can adopt phase and the later gas pressure relief in each stage by extraction working face,
And drilling exists steadily in the long term in "O"-ring fissure zone, sustainable extraction working face overburden of the goaf gas, high and low concentration
Gas can shunt extraction, flexibly match, be conducive to the recycling of gas.
4, in this method upper drilling branched hole of facing upward, except can effectively extraction working face release solution suction belt Neva in addition to this,
When working face is there are when roof delamination water, it is also used as the unrestrained drilling of roof delamination water.
In conclusion the method for the present invention can substitute suction road carry out face gas improvement and short construction period, it is at low cost,
Regulation effect is good, can realize that face gas administers the dual purpose with resource utilization, have significant economic benefit and society
It can benefit.
Description of the drawings
Fig. 1 is distribution schematic diagram of the directional long borehole group of the present invention in face roof；
Fig. 2 is directional long borehole group and the working face position relationship schematic diagram of the present invention；
Fig. 3 is the next hole structure schematic diagram in the directional long borehole group of the present invention；
Fig. 4 is middle position hole structure schematic diagram in the directional long borehole group of the present invention；
Fig. 5 is upper hole structure schematic diagram in the directional long borehole group of the present invention.
Specific implementation mode
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment：
As shown in Figure 1, 2 according to the release desorption of gas and migration characteristics, work IV top covering rockmass of face goaf can be existed
It is divided into air guide fissure zone I on vertical direction, release solution suction belt II and is not easy to solve III three parts of suction belt, in the middle part of goaf
Air guide fissure zone I can be again compacted with pushing to adopt forward for working face, in goaf surrounding due to coal wall supporting role, still
There are "O"-ring fissure zones V.The main aperture section of High Position Drilling group is arranged in "O"-ring fissure zone V, and by construction to
On layer branched hole worn reach in release solution suction belt II.
In the present embodiment, before coal working face back production, on the basis of understanding face roof rock stratum situation, with working face
Vertical stress coefficient of concentration 0.3 determines working face "O"-ring as working face "O"-ring fissure zone boundary at gob edge
Range；With China《Building, water body, railway and main roadway coal column, which stay, to be set and mining pressed coal regulation》The middle water guide for recommending to use
Fissure zone height calculation formula determines working face air guide fissure zone height；When reaching 3 ‰ with coal petrography volume expansivity required for stress
The critical value that the release degree value reached differentiates as " release solution suction belt " range.
Before coal working face back production, away from the orientation moved towards along working face of constructing at a certain distance from cutting eye in air return way 4
Long drilled holes group makes the main aperture section of each drilling be distributed in the goaf "O"-ring fissure zone V formed after working face extraction.
Drilling group is made of multiple directional long boreholes, and drilling hole amount can be by face gas content, the parameters such as boring aperture
It determines, each drilling is distributed in the vertical direction on the different layers position of working face goaf fissure zone, according to each drilling in crack
Band present position difference can be divided into three classes：Near the first the next drilling 1, the second drilling 2 in middle layer position and top
The third drilling 3 of position.
As shown in figure 3, in the directional long borehole group near the next drilling main function be change adopt, goaf watt
This flow direction, avoids gas from entering face upper corner angle.First drilling is by section 11 of facing upward, 13 structure of nearly horizontal segment 12 and sinking section
At wherein nearly horizontal segment 12 and sinking section 13 are effective extraction hole section, nearly horizontal segment 12 is arranged in parallel with coal seam, and sinking section 13 begins
At working face first weighting, sinks down into and pass through working face base object model.
As shown in figure 4, the drilling main function in middle layer position is extraction roof fracture in the directional long borehole group
Band gas.By section 21 of facing upward, nearly horizontal segment 22 is constituted for second drilling, wherein nearly horizontal segment 22 is effective extraction hole section, with coal
Layer parallel arrangement, borehole bottom location is away from working face open-off cut eye distance from the half for working face First Weighting Interval of Main.
As shown in figure 5, near upper drilling main function being in pumping and mining pressure relief solution suction belt in the directional long borehole group
High concentration gas.Third drilling is by section 31 of facing upward, nearly horizontal segment 32 and the composition of Chuan Ceng branches hole section 33 of facing upward, wherein close horizontal
Section 32 and Chuan Ceng branches hole section 33 of facing upward are effective extraction hole section, and nearly horizontal segment 32 is arranged in parallel with coal seam, and borehole bottom location is work
Make at the first weighting of face, Chuan Ceng branches hole section 33 of facing upward is to open branch upwards on nearly horizontal segment 32 to be formed, hole of each branched hole end
Position is located at II coboundary of working face release solution suction belt, and projection of each branched hole in main aperture section is overlapped, and each branched hole is pressed
It constructs successively from the near to the distant away from orifice distance.The length of the directional long borehole group is according to drilling machine construction ability, working face geology
Condition etc. determine, it is necessary to when can be by working face according to tomography, working face across pitch is divided into several sections by coal seam fluctuating inflection point etc.,
Every section, respectively in top board construction directional long borehole group, is segmented mash gas extraction.
When a working face is divided into several sections, when section construction directional long borehole group's mash gas extraction, except close to working face
The lowermost position drilling borehole bottom location for cutting eye needs sinking outer, other sections need not sink, to avoid segmentation mash gas extraction from existing
Blind area, each effective hole section of group that drills pushes to adopt the projection on direction in working face to be overlapped mutually.
The directional long borehole group need to construct completion before being influenced by working face extraction, be influenced in working face extraction to drilling
Start to provide negative pressure mash gas extraction in aperture when borehole bottom location.
Specific embodiment described herein is only an example for the spirit of the invention.Technology belonging to the present invention is led
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (7)
1. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method, which is characterized in that including：
Drilling construction step, construct the directional long borehole group moved towards along working face before coal working face back production, makes the orientation
The High Position Drilling main aperture section of long drilled holes group extends in the goaf "O"-ring fissure zone formed after working face extraction；
Gas pumping step starts to provide negative pressure mash gas extraction in aperture when working face extraction is influenced to drilling borehole bottom location.
2. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that, each drilling of the directional long borehole group is distributed in the different layers of working face goaf fissure zone in the vertical direction
On position.
3. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that, the directional long borehole group includes：
First directional long borehole, be located at the directional long borehole group in lower section, for changing adopt, goaf gas flow direction, keep away
Exempt from gas and enters face upper corner angle；It specifically includes：With the nearly horizontal segment (12) of coal seam parallel arrangement, it is respectively arranged at horizontal segment
(12) the sinking section (13) and section of facing upward (11) of front end and rear end；The sinking section (13) starts from working face first weighting, under
It is sink to and passes through working face base object model.
4. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that, the directional long borehole group includes：
Second directional long borehole is located at the middle layer position of the directional long borehole group, for extraction roof fracture band gas, specifically
Including：The nearly horizontal segment (22) being arranged in parallel with coal seam, and it is set to the section of facing upward (21) of nearly horizontal segment (22) rear end,
Nearly horizontal segment (22) borehole bottom location is away from working face open-off cut eye distance from the half for working face First Weighting Interval of Main.
5. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that, the directional long borehole group includes：
Third directional long borehole is located at the upper layer position of the directional long borehole group, is mainly used in pumping and mining pressure relief solution suction belt high
Concentration gas, specifically includes：
It is arranged in parallel with coal seam and borehole bottom location is located at the nearly horizontal segment at working face first weighting；Successively from nearly horizontal segment rear end
Branch is formed and borehole bottom location is opened upwards is located at face upward Chuan Ceng branch hole section of the working face release desorption with coboundary；Wherein,
The projection of the Chuan Ceng branches hole section on coal seam of facing upward is overlapped.
6. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that,
By working face according to tomography, working face across pitch is divided into several sections by coal seam fluctuating inflection point etc., and every section is applied in top plate respectively
Work directional long borehole group is segmented mash gas extraction.
7. a kind of coal working face top plate high position directional drilling group's pressure relief gas pumping mining method according to claim 1,
It is characterized in that,
Sinking section only is being set close to the lowermost position of working face open-off cut eye drilling borehole bottom location, each effective hole section of group that drills is in working face
Pushing to adopt the projection on direction need to be overlapped mutually.
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Cited By (13)
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| CN109026133A (en) * | 2018-09-30 | 2018-12-18 | 四川华蓥山龙滩煤电有限责任公司 | A kind of pumping method of the mined out absciss layer area gas pressure relief of overlength working face |
| CN109339856A (en) * | 2018-11-29 | 2019-02-15 | 陕西陕煤铜川矿业有限公司 | A kind of method that face gas is administered |
| CN109339746A (en) * | 2018-12-07 | 2019-02-15 | 中国矿业大学 | A kind of roof delamination water cooperates with white-out method with coal measure gas |
| CN109403867A (en) * | 2018-10-15 | 2019-03-01 | 西山煤电(集团)有限责任公司 | Outburst elimination method is taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted |
| CN109667562A (en) * | 2018-12-19 | 2019-04-23 | 中煤科工集团重庆研究院有限公司 | Mining body gas well up-down combined universe extraction method |
| CN110306934A (en) * | 2019-07-02 | 2019-10-08 | 中煤科工集团西安研究院有限公司 | The construction method and supporting drilling tool of double branch's top plate major diameter high position directional long boreholes |
| CN111594258A (en) * | 2020-04-29 | 2020-08-28 | 中煤科工集团西安研究院有限公司 | Technical method for quickly extracting gas to reach standard by using broken soft low-permeability outburst coal seam instead of roadway through holes |
| CN112240221A (en) * | 2020-10-15 | 2021-01-19 | 西安乔木科技技术有限公司 | Gas extraction method based on directional long drill hole |
| CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
| CN112593997A (en) * | 2020-12-11 | 2021-04-02 | 山西晋煤集团技术研究院有限责任公司 | Method for extracting gas in goaf through top plate high-position comb-shaped drill hole |
| CN113446051A (en) * | 2021-07-30 | 2021-09-28 | 太原理工大学 | Goaf ultrahigh-position drill hole gas extraction method under roof cutting and roadway retaining process |
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| CN115506769A (en) * | 2022-09-26 | 2022-12-23 | 中煤科工集团重庆研究院有限公司 | Three-dimensional gas extraction method for coal seam roof fissure zone |
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