CN104594943A - Ground composite L-shaped drilling well for gas control and gas control method - Google Patents
Ground composite L-shaped drilling well for gas control and gas control method Download PDFInfo
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- CN104594943A CN104594943A CN201510028549.6A CN201510028549A CN104594943A CN 104594943 A CN104594943 A CN 104594943A CN 201510028549 A CN201510028549 A CN 201510028549A CN 104594943 A CN104594943 A CN 104594943A
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- pipe
- openend
- hoistway
- mouth
- drilling well
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
The invention provides a ground composite L-shaped drilling well for gas control and a gas control method. The ground composite L-shaped drilling well comprises a horizontal well section and an output well section, wherein the horizontal well section is positioned between a caving zone and a fissure zone above a first production layer, and comprises a first well passage, a second well passage and a third well passage, the first well passage is positioned above a goaf of the first production layer, the second well passage is positioned above a working surface of the first production layer, the third well passage is positioned above a to-be-produced mine body of the first production layer, the working surface is positioned at one side of the to-be-produced mine body, the goaf is positioned at one side, away from the to-be-produced mine body, of the working surface, the output well section comprises a first pipeline and a second pipeline, the second pipeline is positioned at the outer side of the first production layer, a first pipe opening of the first pipeline is communicated with a sixth opening end of the third well passage, and a fourth pipe opening of the second pipeline is connected with ground. The ground composite L-shaped drilling well is used for sucking and producing the gas enriched in the production area of the first production layer.
Description
Technical field
The embodiment of the present invention relates to safety production technique, particularly relates to a kind of ground compound L-type drilling well for gas control and mash gas harnessing method.
Background technology
Along with coal mine mining rate strengthens, New Built Mine and generation mine extend to deep formation, and the threat of gas to safety in production is also increasing, and gas control work receives much concern and payes attention to.
Gas pumping is a kind of gas govenance, existing underground gas extraction technology, needs in the down-hole coal bed middle boring special gas pumping tunnel of driving and arranges extraction pumping plant.
This mode needs unified coordination coal mining and gas pumping, and gas pumping effect and coal mining efficiency are difficult to take into account.
Summary of the invention
The invention provides a kind of ground compound L-type drilling well for gas control and mash gas harnessing method, need unified coordination coal mining and gas pumping to overcome, gas pumping effect and coal mining efficiency are difficult to the problem taken into account.
A first aspect of the present invention provides a kind of ground compound L-type drilling well for gas control, it is characterized in that, comprising: net horizontal section and output well section,
Between the caving zone of described net horizontal section above described first mined bed and fissure zone, described fissure zone is positioned at the top of described caving zone, described net horizontal section comprises the first hoistway, second hoistway and the 3rd hoistway, described first hoistway comprises the first openend and the second openend, described second hoistway comprises the 3rd openend and the 4th openend, described 3rd hoistway comprises the 5th openend and the 6th openend, second openend of described first hoistway is communicated with the 3rd openend of the second hoistway, 4th openend of described second hoistway is communicated with the 5th openend of the 3rd hoistway, described first hoistway is positioned at the top in the goaf of described first mined bed, described second hoistway is positioned at the top of the work plane of described first mined bed, described 3rd hoistway is positioned at the top of waiting to exploit ore body of described first mined bed, wait the side of exploiting ore body described in described work plane is positioned at, described goaf is positioned at described work plane away from described side of waiting to exploit ore body,
Described output well section comprises the first pipeline and second pipe; Described second pipe is positioned at the outside of described first mined bed, described first pipeline comprises first mouth of pipe and second mouth of pipe, described second pipe comprises the 3rd mouth of pipe and the 4th mouth of pipe, first mouth of pipe of described first pipeline is communicated with the 6th openend of described 3rd hoistway, second mouth of pipe of described first pipeline is communicated with the 3rd mouth of pipe of described second pipe, and the 4th mouth of pipe of described second pipe is used for and ground.
Further, the distance between the horizontal projection of the return airway of described net horizontal section and described first mined bed is less than the first predeterminable range, and described first mined bed also comprises air intake lane, and described return airway is communicated with described air intake lane by described work plane.
Further, described first openend lower than described second openend, and/or,
Described 3rd openend lower than described 4th openend, and/or,
Described 5th openend is lower than described 6th openend.
Further, the sidewall of the hoistway of described net horizontal section has the crack extended to rock stratum.
Further, described first pipeline is arc.
Further, described first mouth of pipe of described first pipeline is lower than described second mouth of pipe.
Further, described second pipe is perpendicular to ground.
Further, also comprise: the negative pressure bringing device being arranged at described 4th mouth of pipe place.
The second aspect of the embodiment of the present invention provides a kind of mash gas harnessing method, comprising:
Arrange in exploitation of mineral resources system as arbitrary in first aspect as described in the ground compound L-type drilling well for gas control, described exploitation of mineral resources system comprises at least one first mined bed, to make to carry out in the process of exploiting at described first mined bed, the gas of the above goaf enrichment of described first mined bed discharges down-hole.
Further, also comprise:
Carry out in the process of exploiting at described first mined bed, apply negative pressure at the 4th mouth of pipe place of the second pipe of described drilling well.
Ground compound L-type drilling well for gas control provided by the invention and mash gas harnessing method, by being connected with output channel by arranging horizontal pipe, between the caving zone of described horizontal pipe above described first mined bed and fissure zone, when not affecting the normal mining operations of work plane, the gas of the above goaf enrichment of extraction first mined bed, reduce from goaf to the gas amount of work plane movement, thus reduce the gas emission of work plane, improve the safety of face operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the front view of the ground compound L-type drilling well embodiment one for gas control provided by the invention;
Fig. 2 is the top view of the ground compound L-type drilling well for gas control shown in Fig. 1;
Fig. 3 is the lateral view of the ground compound L-type drilling well for gas control shown in Fig. 1;
Fig. 4 is the stereogram of the ground compound L-type drilling well for gas control shown in Fig. 1;
Fig. 5 for shown in Fig. 1 to Fig. 4 a kind of schematic diagram of detailed description of the invention of the ground compound L-type drilling well for gas control.
Reference numeral:
1, net horizontal section; 2, output well section;
11, the first hoistway; 12, the second hoistway; 13, the 3rd hoistway;
21, the first pipeline; 22, second pipe;
111, the first openend; 112, the second openend;
121, the 3rd openend; 122, the 4th openend;
131, the 5th openend; 132, the 6th openend;
211, first mouth of pipe; 212, second mouth of pipe;
221, the 3rd mouth of pipe; 222, the 4th mouth of pipe;
1000, for the ground compound L-type drilling well of gas control;
2000, the first mined bed; 2001, work plane;
2002, wait to exploit ore body; 2003, air intake lane;
2004, return airway; 2005, goaf;
3000, ground; 4000, fissure zone;
5000, caving zone; 6000, ore deposit mining system.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the front view of the ground compound L-type drilling well embodiment one for gas control provided by the invention; Fig. 2 is the top view of the ground compound L-type drilling well for gas control shown in Fig. 1; Fig. 3 is the lateral view of the ground compound L-type drilling well for gas control shown in Fig. 1; Fig. 4 is the schematic perspective view of the ground compound L-type drilling well for gas control shown in Fig. 1.
As shown in Figures 1 to 4, the ground compound L-type drilling well 1000 for gas control provided by the invention can comprise: net horizontal section 1 and output well section 2.
Between the caving zone 5000 of net horizontal section 1 above the first mined bed 2000 and fissure zone 4000, fissure zone 4000 is positioned at the top of caving zone 5000, net horizontal section 1 comprises the first hoistway 11 second hoistway 12 and the 3rd hoistway 13, first hoistway 11 comprises the first openend 111 and the second openend 112, second hoistway 12 comprises the 3rd openend 121 and the 4th openend 122, 3rd hoistway 13 comprises the 5th openend 131 and the 6th openend 132, second openend 112 of the first hoistway 11 is communicated with the 3rd openend 121 of the second hoistway 12, 4th openend 122 of the second hoistway is communicated with the 5th openend 131 of the 3rd hoistway, first hoistway 11 is positioned at the top in the goaf 2005 of the first mined bed 2000, and the second hoistway 12 is positioned at the top of the work plane 2001 of the first mined bed 2000, and described second hoistway 12 is positioned at the top of waiting to exploit ore body 2002 of the first mined bed 2000.Wherein, work plane 2001 is positioned at the side of waiting to exploit ore body 2002, and goaf 2005 is positioned at work plane 2001 away from the side of waiting to exploit ore body 2002;
Output well section 2 comprises the first pipeline 21 and second pipe 22; Second pipe 22 is positioned at the outside of the first mined bed 2000, first pipeline 21 comprises first mouth of pipe 211 and second mouth of pipe 212, second pipe 22 comprises the 3rd mouth of pipe 221 and the 4th mouth of pipe 222, first mouth of pipe 211 of the first pipeline 21 is communicated with the 6th openend 132 of the 3rd hoistway 13, second mouth of pipe 212 of the first pipeline 21 is communicated with the 3rd mouth of pipe 221 of second pipe 22, and the 4th mouth of pipe 222 of second pipe 22 is for connecting with ground 4000.
It should be noted that, first mining layer can be an exploitation block section, such as, can be that underground has certain length, the solid region of width and the degree of depth, first mining layer can comprise to be waited to exploit ore body, work plane and goaf, at work plane 2001 constantly to waiting to exploit in the process of ore body 2002 propelling, the complete work plane 2001 of back production changes the part in goaf 2005 into, the gas accumulation that the goaf 2005 of the first mined bed 2000 discharges is above goaf 2005, now, if extraction not in time, along with the inbreak of caving zone 5000 above goaf 2005, then the gas of enrichment above goaf 2005 can press to work plane 2001 from goaf 2005, face gas concentration is caused to raise, the safety that impact is produced, in the application scenarios of the embodiment of the present invention, along with the propelling of work plane, geostatic stress in coal seam changes, roof caving above goaf 2005, high-rise rock stratum, position occurs bending and deformation, crack is formed in caving zone 5000 above goaf 2005 and fissure zone 6000, by applying negative pressure at the 4th mouth of pipe 222 place connected with ground 3000, such as, one negative pressure bringing device can be set at the 4th mouth of pipe 222 place, make the gas be gathered in above the goaf 2005 of the first mined bed 2000, move up from goaf 2005, by the crack of caving zone 5000, crack between caving zone 5000 and fissure zone 6000 enters the first hoistway, through the second hoistway, 3rd hoistway, first pipeline and second pipe detach.
Meanwhile, when work plane 2001 is advanced to below the second hoistway 12, the part hoistway of the second hoistway 12 can be divided to the first hoistway 11, make the first hoistway 11 can extract the gas that above goaf 2005, enrichment region is assembled all the time out, thus make when not affecting the normal mining operations of work plane, reduce the gas emission in the goaf 2005 of the first mined bed 2000, improve the safety of work plane operation.
Specifically, when work plane 2001 carries out high-strength working, goaf 2005 and work plane 2001 enriched gas, adopt the ground compound L-type drilling well for gas control provided by the invention can continuously, the gas of efficient extraction above goaf enrichment, effectively reduce threat when gas pours out, production safety caused.
Optionally, distance between the horizontal projection of the return airway 2004 of net horizontal section 1 and the first mined bed 2000 can be less than the first predeterminable range, first mined bed 2000 also comprises air intake lane 2003, and return airway 2004 is communicated with air intake lane 2003 by work plane 2001, can with reference to figure 2.
For example, can with reference to figure 2, return airway 2004 and air intake lane 2003 can be positioned at the both sides of waiting to exploit ore body, and be parallel to each other, one end of return airway 2004 is communicated with work plane 2001, the one end in air intake lane 2003 is communicated with work plane 2001, net horizontal section 1 can be line hoistway always, net horizontal section 1 can arrange parallel with the return airway 2004 of the first mined bed 2000, and net horizontal section 1 and back production lane 2004 distance between the projection on ground can be slightly less than the first predeterminable range, such as, described first predeterminable range can be 50 meters.
Because air intake lane 2003, work plane 2001 and return airway 2004 itself form the circulation passage of an air and gas, the gas that the work plane 2001 of coal mining activity and goaf 2005 gush out is discharged by return airway 2004, increase if the gas emission in goaf 2005 is abnormal, as easy as rolling off a log work plane 2001 gas density that causes transfinites, therefore, net horizontal section 1 is arranged near return airway 2004 can make net horizontal section 1 that the gas of goaf 2005 enrichment is discharged down-hole by net horizontal section 1.
Optionally, the sidewall of the hoistway of net horizontal section 1 can produce some cracks extended to rock stratum when constructing, inbreak layer 5000 also can produce some cracks when inbreak, and the crack of the sidewall of hoistway directly can be communicated with the crack of inbreak layer 5000, makes gas more easily enter net horizontal section.
Optionally, can the first openend 111 of the first well section be arranged lower than the second openend 112; Optionally, can the 3rd openend 121 of the second well section be arranged lower than the 4th openend 122; Optionally, can the 5th openend 131 of Mitsui section be arranged lower than the 6th openend 132; In order to make the gas entering net horizontal section 1 more easily enter output channel 2 through the hoistway tilted, promote the extracting result of gas further.
Such as, top edge 3 times of mining heights of the first mined bed distance can be treated in first openend 111,4th openend 122 can apart from top edge 3.5 times of mining heights treating exploitation ore body of the first mined bed, and the 6th openend 132 can apart from top edge 5 times of mining heights treating exploitation ore body of the first mined bed.Wherein, mining height refers to the mining height of Mars Miner, can with reference to figure 4.
Similar, conveniently gas is discharged smoothly, and the first pipeline 21 can be arc; Optionally, first mouth of pipe 211 of the first pipeline 21 can be arranged lower than second mouth of pipe 212.
Optionally, the second pipe 22 of output channel 2 can be arranged perpendicular to ground, also can determine the particular location of second pipe 22 according to the position of the 4th mouth of pipe.
Ground compound L-type drilling well for gas control provided by the invention, be connected with output channel by arranging horizontal pipe, between the caving zone of described horizontal pipe above described first mined bed and fissure zone, when not affecting the normal mining operations of work plane, the gas of the above goaf enrichment of extraction first mined bed, reduce the gas amount of goaf to work plane movement, improve the safety of work plane operation.
And, only can traditional gas administration way of gas in whole region of extraction coal mining layer relative to some, because its extraction scope is large, extraction dynamics is disperseed, and extracting result is poor, and the ground compound L-type drilling well for gas control provided by the invention, can the gas of subrange enrichment of above goaf of extraction coal mining layer, extraction scope with strong points, extraction dynamics is concentrated, and extracting result is greatly improved.
Fig. 5 is the schematic diagram of a kind of detailed description of the invention of the ground compound L-type drilling well for gas control shown in Fig. 1 to Fig. 4.
As shown in Figure 5, what the present embodiment provided is as follows for the construction detail parameters of each well section in the ground compound L-type drilling well of gas control.
It should be noted that, the ground compound L-type drilling well for gas control provided by the invention can to select before coal mining or initial stage of production carry out the construction of the ground compound L-type drilling well for gas control.
Wherein, the selection of surface drilling location can follow following principle.The first, the correspondence position of the projection on ground of the work plane of prioritizing selection first mined bed, causes strata movement to second pipe structural damage in order to reduce work plane operation; The second, prioritizing selection geological structure is simple, hold easy working position, such as, do not have tomography or other architectonic positions; 3rd, prioritizing selection ore bed is continuous or be subject to the position that geological structure destructiveness is less; 4th, prioritizing selection underground hydrological geological conditions is relatively simple, such as, away from the position of underground reservoir or solution cavity etc.; 5th, prioritizing selection traffic above-ground is more convenient, is applicable to Transport Machinery equipment, or the position of suitable wellbore construction.
In concrete wellbore construction process, can first to construct downwards one section of straight well, the bit drills of diameter 444.5 millimeters to basement rock lower 60 meters can be adopted, put into diameter 339.7 millimeters, thickness is the surface pipe of 9.65 millimeters, well cementation, after waiting for that surface pipe condensation is fixing, again by straight well paragraph point to work plane tilted construction one arcuate socket, arcuate socket paragraph point is to roof distance mining height position, 5 times, coal seam, can be about 50 meters at the projected position distance return airway 2004 of horizontal plane, the bit drills of diameter 311 millimeters can be adopted to A target spot, put into diameter 244.5 millimeters, the protective casing that thickness is 8.94 millimeters, well cementation, wait for that protective casing condensation is fixing, then, to be constructed to working face extraction direction a long inclined hole by arcuate socket paragraph point, long inclined hole section is parallel with tailentry, whole hole point distance roof 3 times of mining heights, the bit drills of direct 190 millimeters is adopted to terminate to B target spot, the length of long inclined hole section is generally not less than 200 meters.
The ground compound L-type drilling well for gas control that the present embodiment provides is through production practices, Stability Analysis of Structures, safety durable, when not affecting the normal mining operations of work plane, can effectively reducing the gas density of the work plane of the first mined bed, improving the safety of work plane operation.
The present invention also provides a kind of application for the exploitation of mineral resources system of the ground compound L-type drilling well of gas control, comprising: the ground compound L-type drilling well for gas control as described at least one first mined bed is as arbitrary in claim 1-7 with at least one;
It is wherein, described that at least one is corresponding with first mined bed for the arbitrary drilling well in the ground compound L-type drilling well of gas control;
Corresponding described first mined bed comprises being positioned at conplanely treats exploitation ore body, work plane, goaf, air intake lane and return airway, wait the side of exploiting ore body described in described work plane is positioned at, described goaf is positioned at described work plane away from described side of waiting to exploit ore body; Described return airway is communicated with the air intake lane of described first mined bed by described work plane;
There is caving zone and fissure zone in the top of described first mined bed, described fissure zone is positioned at the top of described caving zone.
It should be noted that, with reference to figure 1, in the scene of coal mining, can comprise multiple ore bed to be exploited.Each ore bed can be called a mined bed, and each mined bed generally includes: treat exploitation ore body 2002, work plane 2001, goaf 2005, air intake lane 2003 and return airway 2004.Along with back production and the constantly propelling of work plane 2001, work plane 2001 is exploited the contrary side of direction of propulsion and is become goaf 2005.
Application provided by the invention is used for the exploitation of mineral resources system of the ground compound L-type drilling well of gas control, by the horizontal well channel of the ground compound L-type drilling well being used for gas control is connected with output channel, between the caving zone of described horizontal well channel above described first mined bed and fissure zone, described fissure zone is positioned at the top of described caving zone, make when not affecting the normal mining operations of work plane, gas pumping is implemented to the gas enrichment region of the above goaf of the first mined bed, reduce the gas amount of goaf to work plane movement of the first mined bed, improve the safety of work plane operation.
The embodiment of the present invention also provides a kind of mash gas harnessing method, and method of the present invention can comprise:
In exploitation of mineral resources system, arrange arbitrary described ground compound L-type drilling well for gas control as shown in Figure 1 to Figure 4, described exploitation of mineral resources system comprises at least one first mined bed.
Adopt the concrete gas pumping governance process of described drilling well and technique effect to illustrate in embodiment illustrated in fig. 4 at Fig. 1, repeat no more herein.
Thus, carry out in the process of exploiting at described first mined bed, the gas of the above goaf enrichment of described first mined bed can be discharged down-hole.
Optionally, the mash gas harnessing method that the present embodiment provides can also comprise:
Carry out in the process of exploiting at described first mined bed, apply negative pressure, in order to improve gas pumping effect at the 4th mouth of pipe place of the second pipe of described drilling well.
Mash gas harnessing method provided by the invention, by arranging arbitrary described ground compound L-type drilling well for gas control as shown in Figure 1 to Figure 4 in exploitation of mineral resources system, make to carry out in the process of exploiting at described first mined bed, the gas of the above goaf enrichment of described first mined bed can be discharged down-hole, that is, when not affecting the normal mining operations of work plane, gas pumping is implemented to the gas enrichment region of the above goaf of the first mined bed, reduce the gas amount of goaf to work plane movement of the first mined bed, improve the safety of work plane operation.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1., for a ground compound L-type drilling well for gas control, it is characterized in that, comprising: net horizontal section and output well section,
Between the caving zone of described net horizontal section above described first mined bed and fissure zone, described fissure zone is positioned at the top of described caving zone, described net horizontal section comprises the first hoistway, second hoistway and the 3rd hoistway, described first hoistway comprises the first openend and the second openend, described second hoistway comprises the 3rd openend and the 4th openend, described 3rd hoistway comprises the 5th openend and the 6th openend, second openend of described first hoistway is communicated with the 3rd openend of the second hoistway, 4th openend of described second hoistway is communicated with the 5th openend of the 3rd hoistway, described first hoistway is positioned at the top in the goaf of described first mined bed, described second hoistway is positioned at the top of the work plane of described first mined bed, described 3rd hoistway is positioned at the top of waiting to exploit ore body of described first mined bed, wait the side of exploiting ore body described in described work plane is positioned at, described goaf is positioned at described work plane away from described side of waiting to exploit ore body,
Described output well section comprises the first pipeline and second pipe; Described second pipe is positioned at the outside of described first mined bed, described first pipeline comprises first mouth of pipe and second mouth of pipe, described second pipe comprises the 3rd mouth of pipe and the 4th mouth of pipe, first mouth of pipe of described first pipeline is communicated with the 6th openend of described 3rd hoistway, second mouth of pipe of described first pipeline is communicated with the 3rd mouth of pipe of described second pipe, and the 4th mouth of pipe of described second pipe is used for and ground.
2. drilling well according to claim 1, it is characterized in that, distance between the horizontal projection of the return airway of described net horizontal section and described first mined bed is less than the first predeterminable range, and described first mined bed also comprises air intake lane, and described return airway is communicated with described air intake lane by described work plane.
3. drilling well according to claim 1, is characterized in that, described first openend lower than described second openend, and/or,
Described 3rd openend lower than described 4th openend, and/or,
Described 5th openend is lower than described 6th openend.
4. drilling well according to claim 1, is characterized in that, the sidewall of the hoistway of described net horizontal section has the crack extended to rock stratum.
5. drilling well according to claim 1, is characterized in that, described first pipeline is arc.
6. drilling well according to claim 1, is characterized in that, described first mouth of pipe of described first pipeline is lower than described second mouth of pipe.
7. drilling well according to claim 1, is characterized in that, described second pipe is perpendicular to ground.
8. drilling well according to claim 1, is characterized in that, also comprises: the negative pressure bringing device being arranged at described 4th mouth of pipe place.
9. a mash gas harnessing method, is characterized in that, comprising:
Arrange in exploitation of mineral resources system as arbitrary in claim 1-7 as described in the ground compound L-type drilling well for gas control, described exploitation of mineral resources system comprises at least one first mined bed, to make to carry out in the process of exploiting at described first mined bed, the gas of the above goaf enrichment of described first mined bed discharges down-hole.
10. method according to claim 9, is characterized in that, also comprises:
Carry out in the process of exploiting at described first mined bed, apply negative pressure at the 4th mouth of pipe place of the second pipe of described drilling well.
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| CN106761406A (en) * | 2016-12-02 | 2017-05-31 | 淮北矿业（集团）有限责任公司 | A kind of ground L-type mash gas pumping drilling |
| CN107558984A (en) * | 2017-07-27 | 2018-01-09 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of Mining Area Coal Seam gas well batch production development approach |
| CN108952669A (en) * | 2018-07-23 | 2018-12-07 | 中煤科工集团重庆研究院有限公司 | A kind of minery L-type surface well level course position preferred method |
| CN109403923A (en) * | 2018-09-28 | 2019-03-01 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas T-type wears the short horizontal well construction method in goaf |
| CN111878156A (en) * | 2020-08-07 | 2020-11-03 | 山西晋城无烟煤矿业集团有限责任公司 | Micro L-shaped long-life anti-damage well body structure of mining well and well drilling method thereof |
| CN113586134A (en) * | 2021-09-08 | 2021-11-02 | 晋能控股山西科学技术研究院有限公司 | Method for treating gas by hole-lane-replacement combined drainage on coal seam working face |
| CN113586134B (en) * | 2021-09-08 | 2024-04-26 | 晋能控股山西科学技术研究院有限公司 | Method for controlling gas by hole-instead-of-lane combined drainage on coal seam working face |
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| CN113586134A (en) * | 2021-09-08 | 2021-11-02 | 晋能控股山西科学技术研究院有限公司 | Method for treating gas by hole-lane-replacement combined drainage on coal seam working face |
| CN113586134B (en) * | 2021-09-08 | 2024-04-26 | 晋能控股山西科学技术研究院有限公司 | Method for controlling gas by hole-instead-of-lane combined drainage on coal seam working face |
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