CN104047629B - The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas - Google Patents
The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas Download PDFInfo
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- CN104047629B CN104047629B CN201410295227.3A CN201410295227A CN104047629B CN 104047629 B CN104047629 B CN 104047629B CN 201410295227 A CN201410295227 A CN 201410295227A CN 104047629 B CN104047629 B CN 104047629B
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- 239000003245 coal Substances 0.000 title claims abstract description 39
- 238000005553 drilling Methods 0.000 title claims abstract description 30
- 238000000605 extraction Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas, for thin coal bed fully-mechanized mining face, carries out closing under directional drilling extraction the gas of high gas layer in the mode Liu lane by gob side entry retaining. The mode of working face gob side entry retaining, can alleviate digging in thin seam mining process and take over nervous situation than large, digging, shorten working face time, reduce the driving amount of half coal rock tunnel, on the other hand, in gob side entry retaining, creep into directional drilling, directional drilling is arranged in lower coal seam boring on a large scale, greatly increase hole pumping and mining coal-bed gas area, under having reduced by the extraction of directional drilling, close on gas bearing capacity in high gas layer, for the safe high-yield and high-efficiency exploitation in lower coal seam provides condition. The method has solved low-permeable high gas layer gas pumping difficulty, thin seam mining digging ratio is large, drivage ratio is high, the problems such as nervous are taken in digging.
Description
Technical field
The method of the gob side entry retaining directional drilling mash gas extraction the present invention relates to, is particularly useful for the contiguous low air permeability coal seam gas of extraction after the gob side entry retaining directional drilling release in thin coal bed fully-mechanized mining process.
Background technology
Girdle release exploitation and directed mash gas extraction technology are important topics of technology, and domestic and international many experts and scholars have done many research to this, obtained some achievements in research. Girdle accounts for 20.4% left and right of coal gross reserves at the reserves of China, but existing exploitation to girdle exist digging than large, drivage ratio is high, the problems such as nervous are taken in digging. For high gas layer, before exploitation, need that coal-bed gas is carried out to extraction processing and guarantee not occur when the mining high gas coal seam potential safety hazard, for the gas pumping of high gas layer, existing many extraction lanes of arranging separately in high gas layer top board or base plate, in extraction lane, arrange the gas in hole pumping and mining high gas layer, because the method needs to arrange separately a stone head, therefore there is the problems such as cost is high, complex process.
Summary of the invention
Technical problem: the object of the invention is to overcome the problem existing in prior art, a kind of method of closing on coal-bed gas under thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction of simple, effective, economical rationality is provided.
Technical scheme: the method for closing on coal-bed gas under thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction of the present invention, comprises the steps:
A. in thin seam working surface recovery process, by the mode of gob side entry retaining, using this working face of coal seam haulage way as lower curtate working face tailgate;
B. along with the continuous exploitation of thin seam working surface under flitting coal cutting, drag conveyor fortune coal, three operation synergies of hydraulic support stand top board, in the gob side entry retaining that is not less than 20m apart from thin seam working surface rear, arrange a drill site, and in drill site, lay directional drilling machine, slush pump, drillhole inclination survey instrument and auxiliary equipment;
C. in the drill site of arranging in gob side entry retaining, utilize rig to roadway floor inclined drill, and ensure that dip angle of hole is less than 60 °, utilizes clear water as scouring media in boring procedure;
D. in the time that inclined drill creeps into lower roof position, utilize and force whipstock to carry out deflecting boring, when drilling kick-off section creep under close on track in coal seam and change into after level, continue horizontal drilling boring, until preseting length completes creeping into of a boring;
E. complete after the creeping into an of boring, repeating step c, d many times, creep into multiple boring, until complete one group of boring in this drill site;
F., methane gas extraction pipeline is installed, is closed on the extraction of coal-bed gas under one group of boring in this drill site is carried out, the gas of extraction is transported to appointed place by the gas tube being laid in working face haulage way;
G. along with thin seam working surface constantly advances, arrange a drill site along the first drill site of thin seam working surface direction of propulsion distance every 15～30m, repeating step c, d, e, f, complete the gas pumping that closes on coal seam under all.
Beneficial effect: the present invention closes on the concrete condition in lower coal seam according to girdle, in thin seam mining process by the mode of gob side entry retaining, reserved section transport lane is as the return airway of lower curtate working face, in thin seam working surface gob side entry retaining, arrange drill site simultaneously, in drill site, arrange mash gas pumping drilling directional drilling, gas under the closing on of extraction after release in coal seam, directional drilling extraction closes under high gas in coal seam the gas in free state after release. By directional drilling, boring is arranged in lower coal seam on a large scale, has greatly increased draining coal seam gas area, can reduce and close on lower seam gas content by directional drilling mash gas extraction, be more conducive to lower coal seam safety and high efficiency. By the mode of gob side entry retaining, half coal rock tunnel in thin seam mining process be can alleviate on the one hand and slow, the nervous problem of face take-over tunneled, in gob side entry retaining, arrange on the other hand coal-bed gas under drill site extraction, do not need gas pumping lane of specific placement to complete extraction working face, thereby avoid the construction period long, invest the problems such as large, directional drilling is arranged in lower coal seam boring on a large scale, has increased hole pumping and mining coal-bed gas area. Mode by gob side entry retaining can realize the object of " lane three use ", staying lane previous crops is the haulage way of exploitation working face, stay in Hou tunnel, lane and arrange that drill site creeps into directional drilling, after stope has been exploited, gob side entry retaining can be used as lower curtate working face tailgate. The method comprehensive method of investment is lower, has practicality widely.
Brief description of the drawings
Fig. 1 is stope production of the present invention and gob side entry retaining and directional drilling floor plan;
Fig. 2 is of the present invention perpendicular to advance of the face directional profile figure.
In figure: 1-working face haulage way, 2-lower curtate working face, 3-gas tube, 4-hydraulic support, 5-flitting, 6-drag conveyor, 7-gob side entry retaining, 8-drill site, 9-inclined drill, 10-rig, closes on coal seam under 11-.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The method of closing on coal-bed gas under thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction of the present invention, concrete steps are as follows:
A. in thin seam working surface recovery process, by the mode of gob side entry retaining, using this working face of coal seam haulage way 1 as lower curtate working face 2 tailgates;
B. along with thin seam working surface is transported the continuous exploitation under coal, three operation synergies of hydraulic support 4 supporting roof at flitting 5 coal cuttings, drag conveyor 6, be not less than drill site 8 of the interior layout of gob side entry retaining 7 of 20m apart from thin seam working surface rear, and in drill site, laying directional drilling machine 10, slush pump, drillhole inclination survey instrument and auxiliary equipment;
C. in the drill site 8 of gob side entry retaining 7 interior layouts, utilize rig to roadway floor inclined drill 9, and ensure that dip angle of hole is less than 60 °, utilizes clear water as scouring media in boring procedure;
D. when inclined drill 9 creep under while closing on roof position, utilize and force whipstock to carry out deflecting boring, when drilling kick-off section creep under close on the interior track in coal seam 11 and change into after level, continue horizontal drilling boring, until preseting length completes creeping into of a boring;
E. complete after the creeping into an of boring, repeating step c, d many times, creep into multiple boring, until complete one group of boring in this drill site;
F., methane gas extraction pipeline is installed, is closed on the extraction of coal-bed gas under one group of boring in this drill site is carried out, the gas of extraction is transported to appointed place by the gas tube 3 being laid in working face haulage way 1;
G. along with thin seam working surface constantly advances, arrange a drill site along the first drill site of thin seam working surface direction of propulsion distance every 15～30m, repeating step c, d, e, f, complete the gas pumping that closes on coal seam 11 under all.
Claims (1)
1. the method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas, is characterized in that, comprises the steps:
A. in thin seam working surface recovery process, by the mode of gob side entry retaining, using this working face of coal seam haulage way (1) as lower curtate working face (2) tailgate;
B. along with the continuous exploitation of thin seam working surface under flitting (5) coal cutting, drag conveyor (6) fortune coal, three operation synergies of hydraulic support (4) supporting roof, in the gob side entry retaining (7) that is not less than 20m apart from thin seam working surface rear, arrange a drill site (8), and in drill site, lay directional drilling machine (10), slush pump, drillhole inclination survey instrument and auxiliary equipment;
C., in the drill site (8) of arranging in gob side entry retaining (7), utilize rig to roadway floor inclined drill (9), and ensure that dip angle of hole is less than 60 °, utilizes clear water as scouring media in boring procedure;
D. in the time that inclined drill (9) creeps into lower roof position, utilize and force whipstock to carry out deflecting boring, when drilling kick-off section creep under close on track coal seam (11) in and change into after level, continue horizontal drilling and hole, until preseting length completes creeping into of a boring;
E. complete after the creeping into an of boring, repeating step c, d many times, creep into multiple boring, until complete one group of boring in this drill site;
F., methane gas extraction pipeline is installed, is closed on the extraction of coal-bed gas under one group of boring in this drill site is carried out, the gas of extraction is transported to appointed place by the gas tube (3) being laid in working face haulage way (1);
G. along with thin seam working surface constantly advances, arrange a drill site along the first drill site of thin seam working surface direction of propulsion distance every 15～30m, repeating step c, d, e, f, complete the gas pumping that closes on coal seam under all.
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| CN201410295227.3A CN104047629B (en) | 2014-06-25 | 2014-06-25 | The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas |
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| CN201410295227.3A CN104047629B (en) | 2014-06-25 | 2014-06-25 | The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas |
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| CN104047629B true CN104047629B (en) | 2016-05-18 |
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| CN104832209A (en) * | 2015-04-04 | 2015-08-12 | 西安科技大学 | Roadway advanced borehole diversion drainage goaf gas technology |
| CN105545321B (en) * | 2015-12-29 | 2019-01-08 | 山东科技大学 | A kind of small area blasting mining in thin seam working face gob-side entry retaining support method |
| CN105927217B (en) * | 2016-04-29 | 2019-06-25 | 中国矿业大学 | A kind of nearly total rock up-protective layer mining Design method in seam mining |
| CN105909254B (en) * | 2016-04-29 | 2018-04-24 | 中煤科工集团西安研究院有限公司 | Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole |
| CN105971627B (en) * | 2016-06-29 | 2017-12-08 | 河南理工大学 | A kind of projecting coal bed stope drift active workings protrusion-dispelling speedy drivage method of high inclination-angle |
| CN106150541B (en) * | 2016-07-05 | 2019-06-18 | 安徽理工大学 | A kind of bottom plate directional drilling group and neighbouring lower protected seam gas pumping method |
| CN112196619B (en) * | 2020-10-30 | 2023-06-23 | 吕梁学院 | Method for preventing and controlling floor heave deformation interception energy absorption of hard floor tunnel |
| CN113756809B (en) * | 2021-09-29 | 2023-09-05 | 太原理工大学 | Load migration impact mine pressure prevention and control method for ground fracturing thick and hard rock stratum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275469A (en) * | 2008-05-12 | 2008-10-01 | 淮南矿业(集团)有限责任公司 | Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method |
| CN102518464A (en) * | 2011-12-09 | 2012-06-27 | 中国神华能源股份有限公司 | Method for extracting gas at corner on recovery working face in coal mine |
| CN102644477A (en) * | 2012-05-10 | 2012-08-22 | 中国矿业大学 | Method for extracting gas of protected layer through wear layer drilling in protective layer airway high-position drilling field |
| CN103306714A (en) * | 2013-06-09 | 2013-09-18 | 中国矿业大学 | Gas control method for drilling hole and hole three-purpose in close-range coal seam group bottom drainage roadway |
| CN103362539A (en) * | 2013-07-31 | 2013-10-23 | 中国矿业大学 | Method for extracting pressure relief gas by retained roadway drill site drilling |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275469A (en) * | 2008-05-12 | 2008-10-01 | 淮南矿业(集团)有限责任公司 | Yolk coal rock formation downward hole pumping and mining pressure relief mash gas construction method |
| CN102518464A (en) * | 2011-12-09 | 2012-06-27 | 中国神华能源股份有限公司 | Method for extracting gas at corner on recovery working face in coal mine |
| CN102644477A (en) * | 2012-05-10 | 2012-08-22 | 中国矿业大学 | Method for extracting gas of protected layer through wear layer drilling in protective layer airway high-position drilling field |
| CN103306714A (en) * | 2013-06-09 | 2013-09-18 | 中国矿业大学 | Gas control method for drilling hole and hole three-purpose in close-range coal seam group bottom drainage roadway |
| CN103362539A (en) * | 2013-07-31 | 2013-10-23 | 中国矿业大学 | Method for extracting pressure relief gas by retained roadway drill site drilling |
Non-Patent Citations (1)
| Title |
|---|
| 抽放瓦斯弯曲钻孔施工技术;郝世俊;《煤炭科学技术》;20020525;第30卷(第5期);正文第1章-第2.3节，附图1-2 * |
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