CN107130996A - Non-isometric protective layer working face mining layer-through drilling pumping and mining pressure relief mash gas technical method - Google Patents
Non-isometric protective layer working face mining layer-through drilling pumping and mining pressure relief mash gas technical method Download PDFInfo
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- CN107130996A CN107130996A CN201710504488.5A CN201710504488A CN107130996A CN 107130996 A CN107130996 A CN 107130996A CN 201710504488 A CN201710504488 A CN 201710504488A CN 107130996 A CN107130996 A CN 107130996A
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- protected seam
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- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 238000005065 mining Methods 0.000 title claims abstract description 35
- 239000011241 protective layer Substances 0.000 title claims abstract description 16
- 238000005086 pumping Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 25
- 238000000605 extraction Methods 0.000 claims abstract description 20
- 230000035699 permeability Effects 0.000 claims abstract description 18
- 238000009828 non-uniform distribution Methods 0.000 claims abstract description 13
- 230000008595 infiltration Effects 0.000 claims abstract description 10
- 238000001764 infiltration Methods 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 208000035126 Facies Diseases 0.000 claims description 3
- 238000005325 percolation Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- 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. optimising the spacing of wells
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
A kind of non-isometric protective layer working face mining layer-through drilling pumping and mining pressure relief mash gas technical method; on protected seam working face stress and permeability non-uniform Distribution feature base is obtained; protected seam working face is divided into distressed zone (anti-reflection area), area of stress concentration (Jian Tou areas), primitive stress area (original infiltration area) three regions; the layer-through drilling pattern that density is combined is proposed accordingly; and layer-through drilling of being constructed in Di Chou lanes, extraction is carried out to protected seam working face gas pressure relief.The technical method is simple and easy to apply, highly reliable, and drilling construction amount is few, cost is low, and operating efficiency greatly improved, and technical guarantee is provided for the coal and gas prominent danger of elimination protected seam working face.
Description
Technical field
The present invention relates to a kind of underground coal mine pressure relief gas pumping mining technical method, especially non-isometric protective layer working face is opened
Adopt layer-through drilling pumping and mining pressure relief mash gas technical method, it is adaptable to which underground coal mine protected seam working face stress and permeability are non-homogeneous
Pressure relief gas pumping mining under distribution situation.
Technical background
Coal is the main body energy of China, and a large amount of exploitations of coal cause coal mining depth to increase year by year.With exploitation
Depth increase, coal-bed gas pressure gradually increases with gas bearing capacity, and gas emission constantly increases, coal and gas prominent disaster day
Benefit is frequent and severe, and the threat to Safety of Coal Mine Production is also increasing.Meanwhile, most Permeability Coefficent in Coal Seam are only 10-3~
1.0m2/(MPa2.d), cause gas pumping effect poor.Long-term theory research and the mining Practice of dangerous seam with potential prove,
Exploitation protective layer is the regional measure for effectively preventing and treating coal and gas prominent.Therefore, under prior art conditions, exploitation protection
Layer, which combines reinforcing gas pumping, turns into the one preferred technique of effectively preventing and treating coal and gas prominent, to ensureing the dangerous coal of coal and gas prominent
The safety and high efficiency of layer has important practical significance.
However, being influenceed by digging planning and working face arrangement, up-protective layer working face trend and tendency length are general very
Hardly possible is consistent with protected seam, i.e. protective layer working face and the non-isometric wide arrangement of protected seam working face.When up-protective layer work
The trend and tendency length in face are less than protected seam, and the relief area that may result in the protected seam that underlies is limited, and up-protective layer
Reserved coal pillar be further exacerbated by underliing the stress concentration degree of protected seam.Therefore, how to pressure relief gas pumping borehole
Pattern is optimized, it is ensured that protected seam working face thoroughly eliminates coal and gas prominent danger, and reduces as much as possible
Gas control cost, is to put a difficult problem in face of engineering science and technology personnel at the scene.
Goal of the invention
The purpose of the present invention is that there is provided a kind of method is simple and easy to apply, skill in the case where protected seam relief area is limited
The layer-through drilling extraction protected seam gas pressure relief technical method that art is highly reliable, construction cost is low.
Technical scheme
For achieving the above object, the present invention is adopted the following technical scheme that：
A. according to coal mining geology condition, Oceurence Patterns of Petrographic Facies and coal-face mining conditions, synthesis uses mine pressure
With CONTROL OF STRATA MOVEMENT theory and FLAC3D numerical simulation softwares, protected seam working face is adopted during analyzing protective layer working face mining
Dynamic stress temporal and spatial evolution, obtains mining induced stress non-uniform Distribution feature；
B. according to protected seam working face mining induced stress non-uniform Distribution feature, protected seam working face is drawn from plane
It is divided into distressed zone, area of stress concentration and primitive stress area；
C. mining induced stress σ and coal seam permeability K functional relation K=f (σ) is analyzed according to percolation hydraulic theory, and then is obtained
Obtain the non-uniform Distribution feature of protected seam working face permeability；
D. according to the non-uniform Distribution feature of protected seam working face permeability, protected seam working face is drawn from plane
Be divided into anti-reflection area, Jian Tou areas and original infiltration area, it can be seen from the functional relation of mining induced stress and permeability, distressed zone with it is anti-reflection
Area, area of stress concentration and Jian Tou areas, primitive stress area and original infiltration area are completely superposed respectively；
When e. using the gas pressure relief of layer-through drilling extraction protected seam working face, when analysis layer-through drilling spacing is with extraction
Between influence to protected seam working face different zones gas pumping effect, obtain the protected seam under certain extraction time conditions
Effective extraction radius of the layer-through drilling of working face different zones；
F. according to effective extraction radius of layer-through drilling, the conjunction of the layer-through drilling of protected seam working face different zones is determined
Spacing is managed, wherein the spacing of anti-reflection area's layer-through drilling is larger, spacing layer-through drilling is referred to as dredged；The spacing of Jian Tou areas layer-through drilling
It is smaller, referred to as close spacing layer-through drilling；The spacing of original infiltration area layer-through drilling is referred to as between anti-reflection area and Jian Tou areas
For common spacing layer-through drilling；
G. in Di Chou lanes of being constructed below protected seam working face at 15~25m distances, closed according to fixed layer-through drilling
Spacing is managed, the layer-through drilling for different densities of being constructed in Di Chou lanes, drilling penetrates protected seam working face at least 0.5m, to being protected
Sheath working face gas pressure relief carries out extraction, until protected seam working face eliminates coal and gas prominent danger.
Beneficial effects of the present invention：
(1) present invention is according to the stress and the partition characteristics of permeability of protected seam working face, and different spacing of constructing are worn
Layer hole pumping and mining protected seam gas pressure relief, it is ensured that protected seam working face thoroughly eliminates coal and gas prominent danger, method
Simple and easy to apply, engineering reliability is strong；
(2) present invention is optimized to pressure relief gas pumping borehole pattern, is reduced drilling construction amount, is reduced and apply
Work cost, and operating efficiency greatly improved.
Brief description of the drawings
Fig. 1 is the technical method schematic perspective view of the present invention.
Fig. 2 is the technical method floor map of the present invention.
In figure：1- protective layer working faces；2- protected seam working faces；3- distressed zones (anti-reflection area)；4- areas of stress concentration (subtract
Saturating area)；5- primitive stress area (original permeability)；6- dredges spacing layer-through drilling；The close spacing layer-through drillings of 7-；8- is common, and spacing is worn
Layer drilling；9- Di Chou lanes.
Embodiment
1 and 2 pair of embodiments of the invention is further described below in conjunction with the accompanying drawings：
The technical method of the present invention is related to the rational arrangement bores mode of the layer-through drilling at protected seam different zones position,
Including protective layer working face 1, protected seam working face 2, distressed zone (anti-reflection area) 3, area of stress concentration (Jian Tou areas) 4, it is original should
Power area (original permeability) 5, thin spacing layer-through drilling 6, close spacing layer-through drilling 7, common spacing layer-through drilling 8, Di Chou lanes 9,
Concrete operation step is as follows：
A. according to coal mining geology condition, Oceurence Patterns of Petrographic Facies and coal-face mining conditions, synthesis uses mine pressure
With CONTROL OF STRATA MOVEMENT theory and FLAC3D numerical simulation softwares, protected seam working face 2 in the recovery process of protective layer working face 1 is analyzed
Mining stress field temporal and spatial evolution, obtains mining induced stress non-uniform Distribution feature；
B. according to the mining induced stress non-uniform Distribution feature of protected seam working face 2, by protected seam working face 2 from plane
On be divided into distressed zone 3, the primitive stress area 5 of area of stress concentration 4；
C. mining induced stress σ and coal seam permeability K functional relation K=f (σ) is analyzed according to percolation hydraulic theory, and then is obtained
Obtain the permeability non-uniform Distribution feature of protected seam working face 2；
D. according to the permeability non-uniform Distribution feature of protected seam working face 2, by protected seam working face 2 from plane
It is divided into anti-reflection area 3, Jian Tou areas 4 and original infiltration area 5, it can be seen from the functional relation of mining induced stress and permeability, distressed zone
It is completely superposed respectively with anti-reflection area, area of stress concentration and Jian Tou areas, primitive stress area and original infiltration area；
E. use the extraction protected seam working face 2 of layer-through drilling 6,7,8 gas pressure relief when, analysis layer-through drilling spacing with
Influence of the extraction time to the different zones gas pumping effect of protected seam working face 2, is obtained in certain extraction time conditions
Effective extraction radius of the layer-through drilling of the lower different zones of protected seam working face 2；
F. according to effective extraction radius of layer-through drilling 6,7,8, determine the different zones of protected seam working face 2 wears layer brill
The reasonable spacing in hole, wherein the spacing of anti-reflection area's layer-through drilling is larger, referred to as dredges spacing layer-through drilling 6；Wear floor brill in Jian Tou areas
The spacing in hole is smaller, referred to as close spacing layer-through drilling 7；The spacing of original infiltration area layer-through drilling is between anti-reflection area and Jian Tou areas
Between, referred to as common spacing layer-through drilling 8；
G. in Di Chou lanes 9 of being constructed below protected seam working face 2 at 15~25m distances, according to fixed layer-through drilling
Reasonable spacing, the layer-through drilling 6,7,8 for different densities of being constructed in Di Chou lanes, drilling penetrates protected seam working face at least
0.5m, extraction is carried out to the gas pressure relief of protected seam working face 2, until protected seam working face 2 eliminates coal and gas prominent
It is dangerous.
Claims (1)
1. a kind of technical method of non-isometric protective layer working face mining layer-through drilling pumping and mining pressure relief mash gas, it is characterised in that：
A. it is comprehensive to use mine pressure and rock according to coal mining geology condition, Oceurence Patterns of Petrographic Facies and coal-face mining conditions
Protected seam working face, which is adopted, during layer control theory and FLAC3D numerical simulation softwares, analysis protective layer working face mining answers
Power temporal and spatial evolution, obtains mining induced stress non-uniform Distribution feature；
B. according to protected seam working face mining induced stress non-uniform Distribution feature, protected seam working face is divided into from plane
Distressed zone, area of stress concentration and primitive stress area；
C. mining induced stress σ and coal seam permeability K functional relation K=f (σ) is analyzed according to percolation hydraulic theory, and then obtains quilt
The non-uniform Distribution feature of protective layer working face permeability；
D. according to the non-uniform Distribution feature of protected seam working face permeability, protected seam working face is divided into from plane
Anti-reflection area, Jian Tou areas and original infiltration area, it can be seen from the functional relation of mining induced stress and permeability, distressed zone and anti-reflection area,
Area of stress concentration is completely superposed respectively with Jian Tou areas, primitive stress area and original infiltration area；
When e. using the gas pressure relief of layer-through drilling extraction protected seam working face, analysis layer-through drilling spacing and extraction time pair
The influence of protected seam working face different zones gas pumping effect, obtains the protected seam under certain extraction time conditions and works
Effective extraction radius of the layer-through drilling of face different zones；
F. according to effective extraction radius of layer-through drilling, determine protected seam working face different zones layer-through drilling it is reasonable between
Away from, wherein the spacing of anti-reflection area's layer-through drilling is larger, referred to as thin spacing layer-through drilling；The spacing of Jian Tou areas layer-through drilling compared with
It is small, referred to as close spacing layer-through drilling；The spacing of original infiltration area layer-through drilling is referred to as between anti-reflection area and Jian Tou areas
Common spacing layer-through drilling；
G. in the Di Chou lanes of being constructed below protected seam working face at 15~25m distances, according to fixed layer-through drilling it is reasonable between
Away from, the layer-through drilling for different densities of being constructed in Di Chou lanes, drilling penetrates protected seam working face at least 0.5m, to protected seam
Working face gas pressure relief carries out extraction, until protected seam working face eliminates coal and gas prominent danger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504488.5A CN107130996B (en) | 2017-06-28 | 2017-06-28 | Technical method for mining through-layer drilling and pressure relief gas extraction of non-equilong protective layer working face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504488.5A CN107130996B (en) | 2017-06-28 | 2017-06-28 | Technical method for mining through-layer drilling and pressure relief gas extraction of non-equilong protective layer working face |
Publications (2)
| Publication Number | Publication Date |
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| CN107130996A true CN107130996A (en) | 2017-09-05 |
| CN107130996B CN107130996B (en) | 2023-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879079A (en) * | 2021-04-09 | 2021-06-01 | 平顶山天安煤业股份有限公司 | Full life cycle utilization method for bottom drainage roadway of outburst coal seam |
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