CN105484790A - Method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes - Google Patents
Method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes Download PDFInfo
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- CN105484790A CN105484790A CN201510824251.6A CN201510824251A CN105484790A CN 105484790 A CN105484790 A CN 105484790A CN 201510824251 A CN201510824251 A CN 201510824251A CN 105484790 A CN105484790 A CN 105484790A
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- 238000005553 drilling Methods 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000000605 extraction Methods 0.000 title claims abstract description 32
- 239000000428 dust Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001737 promoting effect Effects 0.000 title abstract description 4
- 239000003245 coal Substances 0.000 claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 238000005065 mining Methods 0.000 claims abstract description 19
- 239000002817 coal dust Substances 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims description 46
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 30
- 238000000151 deposition Methods 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 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
- 238000012360 testing method Methods 0.000 description 1
- 238000009736 wetting Methods 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes. In an influence scope of advanced support pressure at a coal mining working face, high pressure water injection is performed, at intervals, on parts of the gas extraction drilling holes of a floor roadway. Intense extraction of advanced pressure relief gas is promoted in the gas extraction drilling holes adjacent to the water injection drilling holes by using a displacement role of the high pressure water to coal seam gas and a pressure relief and fluid increase effect of the coal seam gas at an advanced support pressure relief segment at the coal mining working face. The high pressure water fully permeates the coal body by using a character that coal body fractures are more developmental in the influence scope of the advanced support pressure at the coal mining working face. The flying capacity of original coal dust in the coal body is eliminated. The generation amount of the coal dust is reduced. The dust fall of the working face is promoted. A dilemma that the advanced pressure relief gas extraction at the high gas working face and the coal layer water injection and dust fall cannot be both considered is solved. The advanced pressure relief gas extraction is realized, and a target of effective dust fall at the working face is realized too.
Description
Technical field
The present invention relates to the method that a kind of layer-through drilling interval water filling promotes gas pumping and work plane depositing dust, be applicable to the highly gassy mine that needs simultaneously to take into account coal bed gas extraction and work plane depositing dust or coal and gas outburst mine.
Background technology
For highly gassy mine or coal and gas outburst mine, according to the requirement of the laws and regulations about coal-bed gas diaster prevention and control, taking out in advance of certain hour must be carried out to coal-bed gas, to reduce seam gas content, ensure the safe working of coal-face.Wherein, before working face mining, in coal seam, arrange that coal-bed gas is taken out in a large amount of boring is in advance one of effective ways of highly gassy mine or coal and gas outburst mine control Gas Disaster.
But, some highly gassy mines adopt longwall top coal caving method to mine, there is the problem of work plane space and return airway pollution caused by coal dust in process of production in coal-face, this threatens not only can to the safety in production in colliery, also can cause damage to the healthy of work plane operation worker, therefore, mine must be adopted an effective measure and be reduced the pollution caused by coal dust in work plane space and return airway, improves the working environment of work plane coal mining worker.By arranging that in coal seam the effective measures that Wetting Coal By Seam Infusion is the pollution caused by coal dust of reduction working space are carried out in boring.But before working face mining, gas permeability of coal seam is low, coal-bed flooding speed is comparatively slow, therefore needs in coal seam, arrange that water filling is carried out in boring in advance.But, for these highly gassy mines, in work plane coal seam, arrange a large amount of mash gas pumping drilling, and the whole recovery process in gas pumping need of work continuous firing face, therefore, cause coal-bed flooding and cannot realize in time and spatially.
As can be seen here, for high gas face, in actual production process, if work plane carries out coal-bed flooding depositing dust, work plane can not this coal-bed gas of extraction in advance, there is the contradiction of coal bed gas extraction and coal-bed flooding depositing dust.Therefore, how in time and spatially take into account gas pumping and the coal-bed flooding depositing dust of work plane, just become in highly gassy mine seam mining process the significant technology issues being badly in need of solving simultaneously.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the method that the water filling of a kind of layer-through drilling interval promotes gas pumping and work plane depositing dust, in elimination coal body, primary coal dust flies upward ability, reduce the generation of coal dust, promoting working processes face depositing dust, the double-barreled question that the solution advanced pressure relief gas pumping mining of high gas face and coal-bed flooding depositing dust can not be taken into account simultaneously, had both achieved the extraction of ahead work face gas pressure relief, had achieved again the target of the effective depositing dust of work plane.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The water filling of a kind of layer-through drilling interval promotes the method for gas pumping and work plane depositing dust, in the influence basin of coal-face lead abutment pressure, the part mash gas pumping drilling that floor roadway is chosen at interval carries out high pressure water injection, utilize water under high pressure to the incremental effect of release of the displacement effect of coal-bed gas and coal-face lead abutment pressure release section coal-bed gas, impel the mash gas pumping drilling enhanced gas extraction advanced gas pressure relief contiguous with water injecting drilling; And utilize the feature of coalmass crevasse comparative development in the influence basin of coal ahead work face bearing pressure to make water under high pressure fully infiltrate coal body, in elimination coal body, primary coal dust flies upward ability, reduce the generation of coal dust, promoting working processes face depositing dust, the double-barreled question that the solution advanced pressure relief gas pumping mining of high gas face and coal-bed flooding depositing dust can not be taken into account simultaneously, both achieve the extraction of ahead work face gas pressure relief, achieve again the target of the effective depositing dust of work plane.The method specifically comprises the steps:
(1) according to colliery actual conditions, according to rules and regulations design arrangement coal-face and production system;
(2) according to the Mining technology condition of coal-face, the whole pitch of holes D (general 3 ~ 5m) of adjacent two layer-through drillings of floor roadway is determined; Then in floor roadway, distance working face wall D1 (general 3 ~ 5m) distance starts, and moves towards direction to construct to coal seam some groups of layer-through drillings along coal-face, and layer-through drilling moves towards direction perpendicular to coal-face and floor roadway; Arrange methane gas extraction pipeline simultaneously, and methane gas extraction pipeline is connected with mine gas extraction main pipe rail, connect layer-through drilling and methane gas extraction pipeline, and coal-bed gas is taken out in advance;
(3) adopt the method for field measurement or numerical simulation, obtain the regularity of distribution of the rear coal body bearing pressure of coal-face exploitation, determine the influence basin L of coal-face lead abutment pressure; Simultaneously in floor roadway, arrange high pressure water injection system, and high pressure water injection system and the mine total system that feeds water is connected;
(4) in the influence basin L of coal-face lead abutment pressure, move towards interval, direction along coal-face and select layer-through drilling as water injecting drilling, remove the connection of water injecting drilling and methane gas extraction pipeline, and water injecting drilling is connected with high pressure water injection system; According to the water injection pressure (general 4 ~ 10MPa) of coal face coal soft or hard degree and coal-face lead abutment pressure size determination high pressure water injection system;
(5) the strengthening mash gas pumping drilling of layer-through drilling as the advanced gas pressure relief of coal-face of water injecting drilling will be elected to be in the influence basin L of coal-face lead abutment pressure, using the layer-through drilling outside the influence basin L of coal-face lead abutment pressure as common mash gas pumping drilling, strengthening mash gas pumping drilling and common mash gas pumping drilling are referred to as mash gas pumping drilling, keep the connection of mash gas pumping drilling and methane gas extraction pipeline;
(6) coal-face starts back production, the water under high pressure of comprehensive utilization water injecting drilling, to the incremental effect of release of the displacement effect of coal-bed gas and coal-face lead abutment pressure release section coal-bed gas, strengthens the advanced pressure relief gas pumping mining of the mash gas pumping drilling adjacent with water injecting drilling; The feature of coalmass crevasse comparative development in the influence basin L simultaneously utilizing coal-face lead abutment pressure, the water under high pressure of water injecting drilling is made fully to infiltrate coal body, primary coal seam in the moistening coal body of moisture, causes it and loses the ability of flying upward, and reduces the generation of coal dust during coal-face exploitation.
Beneficial effect: layer-through drilling interval provided by the invention water filling promotes the method for gas pumping and work plane depositing dust, make full use of the feature of coalmass crevasse comparative development in the incremental effect of release of coal-face lead abutment pressure release section coal-bed gas and the influence basin of coal-face lead abutment pressure, solve the double-barreled question that the advanced pressure relief gas pumping mining of high gas face and coal-bed flooding depositing dust can not be taken into account simultaneously, both improve this coal bed gas extraction of coal-face rate, reduce the chance of coal-face generation gas exceeding limit, the coal powder content of coal work space of planes is reduced again in shorter water injection time, for mine realizes safety, high-efficiency mining with ensure that colliery operating personnel is healthy provides guarantee.
Accompanying drawing explanation
Fig. 1 is the boring plane of arrangement schematic diagram that interval of the present invention pouring water into borehole promotes the advanced pressure relief gas pumping mining in this coal seam and work plane depositing dust;
Fig. 2 is that I-I in Fig. 1 is to generalized section;
Fig. 3 is that II-II in Fig. 1 is to generalized section;
In figure: 1, water injecting drilling, 2, mash gas pumping drilling, 3, floor roadway, 4, air intake crossheading, 5, air return way, 6, working face wall.
Detailed description of the invention
Below in conjunction with accompanying drawing and a test examples (Yang Mei group Singapore dollar colliery 310205 work plane), the present invention is further described.
The water filling of layer-through drilling interval promotes a method for gas pumping and work plane depositing dust, comprises the steps:
(1) according to Singapore dollar colliery 310205 work plane actual conditions, according to rules and regulations design arrangement coal-face and production system, work plane face length is 240m;
(2) according to the Mining technology condition of Singapore dollar colliery 310205 work plane, the whole pitch of holes D=5m of adjacent two layer-through drillings along floor roadway direction is determined; Then in floor roadway, distance working face wall D1=5m distance starts, and moves towards direction to construct to coal seam some groups of layer-through drillings along coal-face, and layer-through drilling moves towards direction perpendicular to coal-face and floor roadway; Arrange methane gas extraction pipeline simultaneously, and methane gas extraction pipeline is connected with mine gas extraction main pipe rail, connect layer-through drilling and methane gas extraction pipeline, and coal-bed gas is taken out in advance;
(3) method of field measurement is adopted, the regularity of distribution of coal body bearing pressure after the working face mining of acquisition Singapore dollar colliery 310205, determine the influence basin L=30m of 310205 ahead work face bearing pressures, thus determine that the water injecting drilling moving towards direction along work plane is 3 rows, mash gas pumping drilling is 3 rows; Simultaneously in floor roadway, arrange high pressure water injection system, and high pressure water injection system and the mine total system that feeds water is connected;
(4) in the influence basin L of coal-face lead abutment pressure, select the layer-through drillings of the 2nd, 4 and 6 rows of close working face wall as water injecting drilling, remove the connection of water injecting drilling and methane gas extraction pipeline, and water injecting drilling is connected with high pressure water injection system; Water injection pressure according to coal face coal soft or hard degree and coal-face lead abutment pressure size determination high pressure water injection system is 6MPa;
(5) using the strengthening mash gas pumping drilling of the layer-through drilling of the 2nd, 4 and 6 rows near working face wall as 310205 ahead work face gas pressure reliefs, using the layer-through drilling outside the influence basin L of coal-face lead abutment pressure as common mash gas pumping drilling, strengthening mash gas pumping drilling and common mash gas pumping drilling are referred to as mash gas pumping drilling, keep the connection of mash gas pumping drilling and methane gas extraction pipeline;
(6) coal-face starts back production, the water under high pressure of comprehensive utilization water injecting drilling, to the incremental effect of release of the displacement effect of coal-bed gas and coal-face lead abutment pressure release section coal-bed gas, strengthens the advanced pressure relief gas pumping mining of the mash gas pumping drilling adjacent with water injecting drilling; The feature of coalmass crevasse comparative development in the influence basin L simultaneously utilizing coal-face lead abutment pressure, the water under high pressure of water injecting drilling is made fully to infiltrate coal body, primary coal seam in the moistening coal body of moisture, causes it and loses the ability of flying upward, and reduces the generation of coal dust during coal-face exploitation.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the water filling of layer-through drilling interval promotes a method for gas pumping and work plane depositing dust, it is characterized in that: comprise the steps:
(1) according to colliery actual conditions, according to rules and regulations design arrangement coal-face and production system;
(2) according to the Mining technology condition of coal-face, the whole pitch of holes D of adjacent two layer-through drillings of floor roadway is determined; Then in floor roadway, distance working face wall D1 distance starts, and moves towards direction to construct to coal seam some groups of layer-through drillings along coal-face, and layer-through drilling moves towards direction perpendicular to coal-face and floor roadway; Arrange methane gas extraction pipeline simultaneously, and methane gas extraction pipeline is connected with mine gas extraction main pipe rail, connect layer-through drilling and methane gas extraction pipeline, and coal-bed gas is taken out in advance;
(3) adopt the method for field measurement or numerical simulation, obtain the regularity of distribution of the rear coal body bearing pressure of coal-face exploitation, determine the influence basin L of coal-face lead abutment pressure; Simultaneously in floor roadway, arrange high pressure water injection system, and high pressure water injection system and the mine total system that feeds water is connected;
(4) in the influence basin L of coal-face lead abutment pressure, move towards interval, direction along coal-face and select layer-through drilling as water injecting drilling, remove the connection of water injecting drilling and methane gas extraction pipeline, and water injecting drilling is connected with high pressure water injection system; According to the water injection pressure of coal face coal soft or hard degree and coal-face lead abutment pressure size determination high pressure water injection system;
(5) the strengthening mash gas pumping drilling of layer-through drilling as the advanced gas pressure relief of coal-face of water injecting drilling will be elected to be in the influence basin L of coal-face lead abutment pressure, using the layer-through drilling outside the influence basin L of coal-face lead abutment pressure as common mash gas pumping drilling, strengthening mash gas pumping drilling and common mash gas pumping drilling are referred to as mash gas pumping drilling, keep the connection of mash gas pumping drilling and methane gas extraction pipeline;
(6) coal-face starts back production, the water under high pressure of comprehensive utilization water injecting drilling, to the incremental effect of release of the displacement effect of coal-bed gas and coal-face lead abutment pressure release section coal-bed gas, strengthens the advanced pressure relief gas pumping mining of the mash gas pumping drilling adjacent with water injecting drilling; The feature of coalmass crevasse comparative development in the influence basin L simultaneously utilizing coal-face lead abutment pressure, the water under high pressure of water injecting drilling is made fully to infiltrate coal body, primary coal seam in the moistening coal body of moisture, causes it and loses the ability of flying upward, and reduces the generation of coal dust during coal-face exploitation.
2. layer-through drilling interval according to claim 1 water filling promotes the method for gas pumping and work plane depositing dust, it is characterized in that: in described step (1), and the span of distance D is the span of 3 ~ 5m, distance D1 is 3 ~ 5m.
3. layer-through drilling interval according to claim 1 water filling promotes the method for gas pumping and work plane depositing dust, and it is characterized in that: in described step (4), the span of the water injection pressure of high pressure water injection system is 4 ~ 10MPa.
4. layer-through drilling interval according to claim 1 water filling promotes the method for gas pumping and work plane depositing dust, it is characterized in that: in described step (4), and the row's layer-through drilling near working face wall is elected to be mash gas pumping drilling.
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| CN201510824251.6A CN105484790A (en) | 2015-11-24 | 2015-11-24 | Method for promoting gas extraction and working face dust fall by injecting water at intervals in drilling holes |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321143A (en) * | 2016-11-04 | 2017-01-11 | 中国矿业大学 | Quick pressure-relief gas discharge method for exposing super-thick and soft outburst coal seam in vertical wellbore |
| CN106703871A (en) * | 2017-02-06 | 2017-05-24 | 华北科技学院 | Method of using high-pressure water injection to prevent and treat gas coal dust |
| CN110500095A (en) * | 2019-09-20 | 2019-11-26 | 西安科技大学 | Slim hole pressure relief method under a kind of equivalent area |
| CN111794798A (en) * | 2020-07-13 | 2020-10-20 | 安徽理工大学 | Working face dynamic pressure water injection dust fall method for layered fully-mechanized mining of slowly-inclined thick coal seam |
| CN112879073A (en) * | 2021-03-22 | 2021-06-01 | 北京天地玛珂电液控制系统有限公司 | Water injection method for underground coal mining coal seam or rock stratum |
| CN114046148A (en) * | 2021-11-10 | 2022-02-15 | 中国矿业大学 | Liquid CO2Method for improving coal seam water injection effect by fracturing and permeability increasing |
| CN114109382A (en) * | 2021-11-30 | 2022-03-01 | 中国矿业大学 | Coal bed liquid CO2Water intelligent circulating filling, cracking, moistening and dust reducing system |
| CN114151124A (en) * | 2021-11-30 | 2022-03-08 | 中国矿业大学 | Water injection dust reduction method for intelligent liquid carbon-water circulating injection fracturing and moistening coal seam |
| CN115596418A (en) * | 2022-12-15 | 2023-01-13 | 华北理工大学（Cn） | System and method for increasing coal bed gas by deep geothermal energy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321143A (en) * | 2016-11-04 | 2017-01-11 | 中国矿业大学 | Quick pressure-relief gas discharge method for exposing super-thick and soft outburst coal seam in vertical wellbore |
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| CN106703871B (en) * | 2017-02-06 | 2019-03-01 | 华北科技学院 | A kind of method of high pressure water injection prevention and treatment gas and coal dust |
| CN110500095A (en) * | 2019-09-20 | 2019-11-26 | 西安科技大学 | Slim hole pressure relief method under a kind of equivalent area |
| CN111794798A (en) * | 2020-07-13 | 2020-10-20 | 安徽理工大学 | Working face dynamic pressure water injection dust fall method for layered fully-mechanized mining of slowly-inclined thick coal seam |
| CN112879073A (en) * | 2021-03-22 | 2021-06-01 | 北京天地玛珂电液控制系统有限公司 | Water injection method for underground coal mining coal seam or rock stratum |
| CN112879073B (en) * | 2021-03-22 | 2024-01-26 | 北京天玛智控科技股份有限公司 | Water injection method for exploiting coal seam or rock stratum in underground coal mine |
| CN114046148A (en) * | 2021-11-10 | 2022-02-15 | 中国矿业大学 | Liquid CO2Method for improving coal seam water injection effect by fracturing and permeability increasing |
| CN114046148B (en) * | 2021-11-10 | 2023-02-21 | 中国矿业大学 | Liquid CO 2 Method for improving coal seam water injection effect by fracturing and permeability increasing |
| CN114109382A (en) * | 2021-11-30 | 2022-03-01 | 中国矿业大学 | Coal bed liquid CO2Water intelligent circulating filling, cracking, moistening and dust reducing system |
| CN114151124A (en) * | 2021-11-30 | 2022-03-08 | 中国矿业大学 | Water injection dust reduction method for intelligent liquid carbon-water circulating injection fracturing and moistening coal seam |
| CN114109382B (en) * | 2021-11-30 | 2023-02-24 | 中国矿业大学 | Coal bed liquid CO 2 Water intelligent circulating filling, cracking, moistening and dust reducing system |
| CN115596418A (en) * | 2022-12-15 | 2023-01-13 | 华北理工大学（Cn） | System and method for increasing coal bed gas by deep geothermal energy |
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Application publication date: 20160413 |