CN103161492A - Gas extraction well location method based on overlying rock fracture shell - Google Patents
Gas extraction well location method based on overlying rock fracture shell Download PDFInfo
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- CN103161492A CN103161492A CN2011104251310A CN201110425131A CN103161492A CN 103161492 A CN103161492 A CN 103161492A CN 2011104251310 A CN2011104251310 A CN 2011104251310A CN 201110425131 A CN201110425131 A CN 201110425131A CN 103161492 A CN103161492 A CN 103161492A
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- 238000000605 extraction Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011435 rock Substances 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 21
- 238000005086 pumping Methods 0.000 claims description 20
- 238000010009 beating Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 208000010392 Bone Fractures Diseases 0.000 abstract 12
- 206010017076 Fracture Diseases 0.000 abstract 12
- 208000013201 Stress fracture Diseases 0.000 abstract 1
- 238000010327 methods by industry Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a gas extraction well location method based on an overlying rock fracture shell. The gas extraction well location method based on the overlying rock fracture shell is characterized by comprising the step of drilling tilting holes with large diameters in multiple areas of a gob overlying rock from a gas tail lane (6) directly. The multiple areas of the gob overlying rock comprise a low post fracture shell (1), a middle post fracture shell (2) and a high post fracture shell (3) from bottom to top, wherein the low post fracture shell (1) is a gob fracture vertical destroying development zone, the high post fracture shell (3) is a gob separation layer fracture and micro fracture development zone, and the middle post fracture shell (2) is located between the high post fracture shell and the low post fracture shell. The construction of extracting and drilling is carried out directly by using the existing gas tail lane, and extraction drilling holes are respectively arranged in the multiple areas of the overlying rock. Not only can gas with high concentration be effectively extracted, but also a seepage field on a gob return air side zone is interfered. Extraction efficiency is high, the processes of digging, drilling and drainage lane are reduced, the link of process engineering is simplified, and cost is lowered.
Description
Technical field
The present invention relates to the coal mine gas drainage field, relate in particular to a kind of boring method for arranging for goaf overlying rock gas pumping.
Background technology
At present, press CONTROL OF STRATA MOVEMENT theoretical according to the ore deposit, generally the goaf overlying rock is divided into " perpendicular three bands " and " Heng San district " according to goaf overlying rock mining induced fissure feature." perpendicular three bands " can be divided into the bending subsidence band from top to bottom, top board fissure zone and caving zone, extraction is carried out extraction mainly for the fissure zone development area, be that 03113021.6 Chinese patent application discloses a kind of " method of pumping out gas from mining coal layer roof " as application number, at the working seam top board, for being subjected to the crack passage of mining influence formation to be pooled to " gas drainage " interior desorb gas from exploitation and pressure released seam by the goaf overlying rock, carry out extraction by the boring or the tunnel that are arranged in " gas drainage ", " gas drainage " is positioned at coal-face near the above absciss layer fissure zone of the goaf top plate caving zone in return airway and air intake lane.
The gas drainage under suction in existing goaf top plate crack district mainly contains the high methods such as lane, incline high-position alley pumping and High Position Drilling extraction of taking out of level, also only limits to the top board fissure zone, can be less than normal for the extraction scope, and hole pumping and mining usefulness is on the low side.Some mining induced fissures district drainage method need to be beaten independent top board extraction tunnel, adopt roadway in the roof drilling or roadway in the roof to carry out pressure relief gas pumping mining, these methods have increased gas control engineering quantity and input, and extraction tunnel self is namely a methane accumulation zone, poor stability.In addition, carry out extraction in " fissure zone " or " gas drainage " zone, extraction borehole layer of living in position is lower, lost efficacy gradually with the roof caving compacting, effectively the extraction time is short, also can not carry out extraction to the high concentration gas in deep, goaf, be unfavorable for efficiently reducing the goaf gas effusion intensity.
Summary of the invention
purpose of the present invention is exactly the problem that exists in order to overcome above-mentioned prior art, a kind of mash gas pumping drilling method for arranging based on overlying rock crack shell is provided, gas migration characteristic and fissure zone distribution characteristics are combined classify, utilize existing gas tail road directly to carry out the construction of extraction borehole, extraction borehole is arranged into respectively in a plurality of zones of overlying rock, effective extraction high concentration gas not only, and disturbed the seepage field of return air lateral areas, goaf, extraction usefulness is high, and reduced and beaten extraction lane technique, simplified the technology link, reduced cost.
For realizing above-mentioned purpose of the present invention, provide following technical scheme:
A kind of mash gas pumping drilling method for arranging based on overlying rock crack shell is characterized in that comprising from gas tail road and directly beats the step of inclination large diameter borehole to a plurality of zones of goaf overlying rock.
Wherein, a plurality of zones of goaf overlying rock comprise from bottom to top low level crack shell, meta crack shell and high-order crack shell; Wherein, low level crack shell is vertical fractured zone development district, crack, goaf; High-order crack shell is absciss layer crack, goaf and microfissure development area; Meta crack shell is between high-order crack shell and low level crack shell.
Particularly, the step of beating the inclination large diameter borehole comprises from described gas tail road directly beats shell auger hole, a plurality of high-order crack to described high-order crack shell, and shell auger hole, a plurality of high-order crack is arranged in juxtaposition along gas tail road.
In addition, the step of beating the inclination large diameter borehole also comprises from described gas tail road directly beats shell auger hole, a plurality of low levels crack to described low level crack shell, shell auger hole, a plurality of low levels crack is arranged in juxtaposition along gas tail road, each shell auger hole, low level crack respectively with extraction borehole group of the corresponding formation in shell auger hole, described high-order crack.
Particularly, the shell auger hole, described high-order crack in each described boring group and the distance between shell auger hole, described low level crack are 10～20m; Distance between adjacent described extraction borehole group is 30～60m.
Wherein, terminal and the distance between return airway in shell auger hole, high-order crack are less than or equal to 1/2 of face length, and greater than htan α, the whole hole height in shell auger hole, the high-order crack of h, α are that the rib supporting affects the angle.
Shell auger hole, high-order crack enters in key stratum, and the terminal of high-order inclination large diameter borehole is positioned at the key stratum zone or key stratum is above regional, and the distance between roof is 40～80m.
Beneficial effect of the present invention embodies in the following areas:
1) utilize the existing gas tail road of " U+L " type ventilation system directly to carry out the construction of extraction borehole, reduced and beaten extraction lane technique, simplified the technology link, reduction of expenditure, human and material resources, financial resources;
2) shell zone, meta crack is passed in shell auger hole, high-order crack, is arranged into high-order crack shell central region, and the high concentration gas that extraction goaf top plate zone is gathered effectively reduces the goaf gas effusion intensity.
3) extraction borehole is arranged into respectively in low level crack shell and high-order crack shell, forms the extraction borehole group and carry out extraction, effective extraction high concentration gas not only, and disturbed the seepage field of return air lateral areas, goaf, extraction usefulness is high;
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the mash gas pumping drilling method for arranging of overlying rock crack shell;
Fig. 2 the present invention is based on the schematic diagram that the mash gas pumping drilling of overlying rock crack shell is arranged.
Description of reference numerals: 1-low level crack shell; 2-meta crack shell; The high-order crack of 3-shell; The 4-work plane; 5-emits and settles in an area; The 6-gas tail road; The 7-return airway; 8-air intake lane; The 9-coal seam; Shell auger hole, 10-low level crack; Shell auger hole, the high-order crack of 30-.
The specific embodiment
The present invention is based on as described in the schematic diagram that the mash gas pumping drilling of overlying rock crack shell arranges as Fig. 2, the present invention is divided into low level crack shell 1, meta crack shell 2 and high-order crack shell 3 from bottom to top with the goaf overlying rock.Low level crack shell 1 is mainly vertical fractured zone development district, crack, goaf, be positioned at caving zone top, fissure zone lower area, connectivity is strong in vertical direction, affected by goaf air leaking near the low level crack shell in work plane 4 zones larger, the gas pressure relief of upper adjacent layer easily pours in to emit under the effect of ventilation negative pressure settles in an area 5; High-order crack shell 3 is mainly absciss layer crack, goaf and microfissure development area, comprise fissure zone upper area, bending subsidence band lower area, connectivity is strong in the horizontal direction, affected by goaf air leaking little, for high concentration gas is stablized accumulation region, migrate under the effect of gas density gradient and ventilation negative pressure.High-order crack shell is along with the advance of the face produces gradually, and exist for a long time in the exploitation process of whole work plane, therefore, layer of living in position, shell auger hole, high-order crack is higher, and can carry out high-effect extraction to this zone at the whole exploitation process of work plane, form a plurality of meeting points in the deep, goaf, effectively reduced the goaf gas effusion intensity.Meta crack shell 2 is between high-order crack shell 3 and low level crack shell 1, and leading fissure direction is not obvious.
The mash gas pumping drilling method for arranging that the present invention is based on overlying rock crack shell comprises the steps:
By gas tail road 6 directly to shell auger hole, 3 dozens of a plurality of high-order cracks of high-order crack shell 30, shell auger hole, a plurality of high-order crack 30 is passed meta crack shell 2 and is entered high-order crack shell 3 (as shown in Figure 2), shell auger hole 30, a plurality of high-order crack is arranged in juxtaposition (as shown in Figure 1) along gas tail road 6, so that the high concentration gas that extraction goaf top plate regional stability gathers effectively reduces the goaf gas effusion intensity.
By by gas tail road 6 directly to 10 (as shown in Figure 2) of shell auger hole, 1 dozen of a plurality of low levels crack of shell, low level crack, shell auger hole 10, a plurality of low levels crack is arranged in juxtaposition (as shown in Figure 1) along gas tail road 6.So that effective a large amount of high concentration gas of extraction, and formed a plurality of meeting points in the deep, goaf, effectively disturb the gas flow field in return side zone, goaf, reduce the goaf high concentration gas and pour in to return airway 7 and gas tail road 6.
Each shell auger hole, low level crack 10 respectively with extraction borehole group A of shell auger hole, a high-order crack 30 corresponding formation.
Shell auger hole, high-order crack 30 in each boring group A and the distance between shell auger hole, low level crack 10 are 10～20m; Distance between adjacent boring group A is 30～60m.
in addition, in the present invention, the terminal in shell auger hole, high-order crack 30 and the distance between return airway 7 are less than 1/2 of face length, make the terminal in shell auger hole, high-order crack 30 be positioned at work plane return side zone, and boring length is unlikely to oversize, the terminal in shell auger hole, high-order crack 30 and the distance between return airway 7 are greater than h/tan α, h is the terminal height in shell auger hole, high-order crack, α is that the rib supporting affects the angle, boring should enter into above goaf crack and absciss layer development area, effective extraction section of avoiding holing is positioned at rib and supports influence area (otherwise extracting result is poor), the terminal in shell auger hole, high-order crack 30 enters in key stratum, and terminal is positioned at key stratum zone or key stratum above zone, and height size determines according to on-the-spot coal rock layer occurrence condition, generally and the distance between roof be 40～80m.
Adopt boring method for arranging of the present invention to carry out extraction to goaf gas, make the gas density of upper corner be controlled at below 0.85%, in return, gas density below 0.70%, efficiently solves the difficult problem of gas exceeding limit in upper corner and return.
Although above the present invention has been done detailed description; but the invention is not restricted to this; those skilled in the art can principle according to the present invention modify, and therefore, all various modifications of carrying out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (8)
1. the mash gas pumping drilling method for arranging based on overlying rock crack shell, is characterized in that comprising the step of directly beating the inclination large diameter borehole to a plurality of zones of goaf overlying rock from gas tail road (6).
2. mash gas pumping drilling method for arranging as claimed in claim 1, is characterized in that, a plurality of zones of described goaf overlying rock comprise low level crack shell (1), meta crack shell (2) and high-order crack shell (3) from bottom to top; Wherein,
Low level crack shell (1) is vertical fractured zone development district, crack, goaf;
High-order crack shell (3) is absciss layer crack, goaf and microfissure development area;
Meta crack shell (2) is between high-order crack shell and low level crack shell.
3. mash gas pumping drilling method for arranging as claimed in claim 2, it is characterized in that, described step of beating the inclination large diameter borehole comprises from described gas tail road (6) directly beats a plurality of shell auger holes, high-order crack (30) to described high-order crack shell (3), and a plurality of shell auger holes, high-order crack (30) are arranged in juxtaposition along gas tail road (6).
4. mash gas pumping drilling method for arranging as claimed in claim 3, it is characterized in that, described step of beating the major diameter inclined drill also comprises from described gas tail road (6) directly beats shell auger hole, a plurality of low levels crack (10) to described low level crack shell (1), shell auger hole, a plurality of low levels crack (10) is arranged in juxtaposition along gas tail road (6), each shell auger hole, low level crack (10) respectively with a described shell auger hole, high-order crack (a 30) extraction borehole group of corresponding formation (A).
5. mash gas pumping drilling method for arranging as claimed in claim 4, is characterized in that, the shell auger hole, described high-order crack (30) in each described boring group (A) and the distance between shell auger hole, described low level crack (10) are 10～20m.
6. mash gas pumping drilling method for arranging as claimed in claim 5, is characterized in that, the distance between adjacent described extraction borehole group (A) is 30～60m.
7. mash gas pumping drilling method for arranging as claimed in claim 6, it is characterized in that, distance between the terminal in described shell auger hole, high-order crack (30) and return airway (7) is less than 1/2 of work plane (4) length, greater than htan α, the whole hole height in shell auger hole, the high-order crack of h, α are that the rib supporting affects the angle.
8. mash gas pumping drilling method for arranging as claimed in claim 6, it is characterized in that, described shell auger hole, high-order crack (30) enters in key stratum, the terminal in high-order shell auger hole, crack (30) is positioned at the key stratum zone or key stratum is above regional, and the distance between roof is 40～80m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104251310A CN103161492A (en) | 2011-12-16 | 2011-12-16 | Gas extraction well location method based on overlying rock fracture shell |
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| CN2011104251310A CN103161492A (en) | 2011-12-16 | 2011-12-16 | Gas extraction well location method based on overlying rock fracture shell |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489362A (en) * | 2013-09-22 | 2014-01-01 | 安徽理工大学 | Simulation demonstration system model for revealing moving of overlying rock layer at coal goaf |
| CN103557026A (en) * | 2013-10-28 | 2014-02-05 | 煤科集团沈阳研究院有限公司 | Method for removing upper corner gas based on pipe-jacking tunneling device |
| RU2541347C1 (en) * | 2014-01-30 | 2015-02-10 | Федеральное государственное бюджетное учреждение науки ИНСТИТУТ ПРОБЛЕМ КОМПЛЕКСНОГО ОСВОЕНИЯ НЕДР РОССИЙСКОЙ АКАДЕМИИ НАУК (ИПКОН РАН) | Method of forecast of location of lower boundary of explosive gas zone in stope |
| CN104500129A (en) * | 2014-12-18 | 2015-04-08 | 大同煤矿集团有限责任公司 | Comprehensive extraction method suitable for gas drainage of large-mining-height working face |
| CN104564127A (en) * | 2015-02-12 | 2015-04-29 | 湖南科技大学 | Method for extracting gas in coal seams under overlying hung thick igneous rocks |
| CN104790949B (en) * | 2015-03-11 | 2016-08-17 | 中国矿业大学(北京) | Huge thick tight roof high methane high seam Roof Control and method and the drilling machine improving gas drainage under suction efficiency |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| CN110043309B (en) * | 2019-05-29 | 2020-07-28 | 中国煤炭地质总局勘查研究总院 | Arrangement method for closing gas extraction well of coal mine and well body installation method |
| CN112647943A (en) * | 2020-12-18 | 2021-04-13 | 华能煤炭技术研究有限公司 | Coal and gas co-mining method |
| CN113062762A (en) * | 2021-03-26 | 2021-07-02 | 太原理工大学 | Method for improving gas extraction efficiency of high-suction roadway |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103489362A (en) * | 2013-09-22 | 2014-01-01 | 安徽理工大学 | Simulation demonstration system model for revealing moving of overlying rock layer at coal goaf |
| CN103489362B (en) * | 2013-09-22 | 2015-04-08 | 安徽理工大学 | Simulation demonstration system model for revealing moving of overlying rock layer at coal goaf |
| CN103557026B (en) * | 2013-10-28 | 2015-12-30 | 煤科集团沈阳研究院有限公司 | A kind of method solving gas at upper corner based on push pipe mole |
| CN103557026A (en) * | 2013-10-28 | 2014-02-05 | 煤科集团沈阳研究院有限公司 | Method for removing upper corner gas based on pipe-jacking tunneling device |
| RU2541347C1 (en) * | 2014-01-30 | 2015-02-10 | Федеральное государственное бюджетное учреждение науки ИНСТИТУТ ПРОБЛЕМ КОМПЛЕКСНОГО ОСВОЕНИЯ НЕДР РОССИЙСКОЙ АКАДЕМИИ НАУК (ИПКОН РАН) | Method of forecast of location of lower boundary of explosive gas zone in stope |
| CN104500129A (en) * | 2014-12-18 | 2015-04-08 | 大同煤矿集团有限责任公司 | Comprehensive extraction method suitable for gas drainage of large-mining-height working face |
| CN104500129B (en) * | 2014-12-18 | 2016-09-14 | 大同煤矿集团有限责任公司 | It is applicable to the comprehensive pumping method of large-mining-height working surface gas drainage under suction |
| CN104564127A (en) * | 2015-02-12 | 2015-04-29 | 湖南科技大学 | Method for extracting gas in coal seams under overlying hung thick igneous rocks |
| CN104790949B (en) * | 2015-03-11 | 2016-08-17 | 中国矿业大学(北京) | Huge thick tight roof high methane high seam Roof Control and method and the drilling machine improving gas drainage under suction efficiency |
| CN109026134A (en) * | 2018-10-23 | 2018-12-18 | 山西新景矿煤业有限责任公司 | A kind of fully mechanized coal face low level extraction lane gas pumping method |
| CN110043309B (en) * | 2019-05-29 | 2020-07-28 | 中国煤炭地质总局勘查研究总院 | Arrangement method for closing gas extraction well of coal mine and well body installation method |
| CN112647943A (en) * | 2020-12-18 | 2021-04-13 | 华能煤炭技术研究有限公司 | Coal and gas co-mining method |
| CN113062762A (en) * | 2021-03-26 | 2021-07-02 | 太原理工大学 | Method for improving gas extraction efficiency of high-suction roadway |
| CN113062762B (en) * | 2021-03-26 | 2022-06-07 | 太原理工大学 | Method for improving gas extraction efficiency of high-suction roadway |
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Application publication date: 20130619 |