CN107975359B - A kind of anti-disaster method of coal-bed flooding based on seawater corrosion - Google Patents
A kind of anti-disaster method of coal-bed flooding based on seawater corrosion Download PDFInfo
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- CN107975359B CN107975359B CN201711178414.3A CN201711178414A CN107975359B CN 107975359 B CN107975359 B CN 107975359B CN 201711178414 A CN201711178414 A CN 201711178414A CN 107975359 B CN107975359 B CN 107975359B
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- seawater
- coal
- disaster
- coal seam
- gas
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Classifications
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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
Abstract
The anti-disaster method of a kind of coal-bed flooding based on seawater corrosion disclosed by the invention, including drilling through the extraction borehole that radius is 110mm to mash gas extraction coal seam first, extraction borehole center cut is at " jujube nucleon bodies ", venthole and water injection hole are being drilled through respectively apart from extraction borehole hole wall top 80mm and lower part 80mm, venthole and water injection hole terminal are connected to extraction borehole " jujube nucleon bodies ", gas drainage pipe is sent to inside extraction borehole, it is sealed using conventional method for sealing, seawater is injected into " jujube nucleon bodies ", when gage pressure declines suddenly, stop water injecting pump, complete seawater injection process.Due to containing minerals in the crack in coal seam, seawater has corrosivity, seawater is reacted with coal seam internal mineral matter component, increase the crevice space in coal seam, increase the permeability of gas and seawater, promotes coal bed gas extraction, coal-bed gas disaster can be reduced, meanwhile moisture content increases in coal seam, can reduce dust disaster and coal and gas prominent disaster.
Description
Technical field
The present invention relates to a kind of anti-disaster methods of the coal-bed flooding based on seawater corrosion, belong to underground coal mine regional gas control
Technical field is particularly suitable for soaking coal seam progress water injection work in difficulty.
Background technique
Underground coal dust, gas and bump not only seriously endanger the health of coal miner, but also are mine safety productions
Major hidden danger.Coal-bed flooding technology is one of most positive, effective Mine Integrated reason technology.Coal-bed flooding is exactly in coal seam
Before exploitation, if playing dry hole, by drilling to coal body injection pressure water, water is made to be distributed evenly in the countless subtle cracks in coal seam
It among hole, reduces wetted coal body by the ability for generating the coal dust that swims, while filling the water so that coal seam softening, it is strong to reach peak value
Coal body resistance capacity to deformation reduces with reduced amplitude is strained after degree, to prevent and treat bump.The research starting in China is opposite
Later, by decades effort, water filling equipment is constantly improve, and is also studied the permeance property of coal body, and discovery is only by general
When carrying out soaking coal seam, ideal effect is often not achieved in water flowing.In order to solve the problems, such as the above coal-bed flooding difficulty injection, at present
Commonly used technology is reinforcing agent to be added in water, but chemical component therein can cause certain danger to human body, environment
Evil and higher cost, therefore be badly in need of seeking a kind of nontoxic anti-disaster method of completely new coal-bed flooding.
Summary of the invention
Technical problem: the difficult water filling problem that the purpose of the present invention is encounter during taking precautions against natural calamities for coal-bed flooding provides one
Kind simple process, easy to operate, gas pumping effect significantly improves, the anti-disaster method of the coal-bed flooding based on seawater corrosion.
Technical solution:
A kind of anti-disaster method of coal-bed flooding based on seawater corrosion of the invention, which comprises the steps of:
A. the extraction borehole that radius is 110mm is being drilled through to mash gas extraction coal seam, extraction borehole center cut is at " jujube nucleon
Bodies "；
B. venthole and water injection hole are being drilled through respectively apart from extraction borehole hole wall top 80mm and lower part 80mm, venthole and
Water injection hole terminal is connected to extraction borehole " jujube nucleon bodies ", and venthole and water filling pore radius are 60mm, in venthole
Escape pipe is installed, water injection hole installs water injection pipe；
C. gas drainage pipe is sent to inside extraction borehole, using conventional method for sealing successively to extraction borehole, outlet
Hole and water injection hole are sealed；
D. the seawater of preparation is packed into water tank, connects water tank and water injecting pump, close valve one and valve two, open valve
Three, water injecting pump is opened, injects seawater in " the jujube nucleon bodies " of Xiang Liantong；
E. when one pressure of pressure gauge declines suddenly, stopping water injecting pump completing seawater injection process；
F. due to containing minerals in the crack in coal seam, seawater has corrosivity, seawater and coal seam internal mineral matter component
Reaction increases the crevice space in coal seam, and the permeability for increasing gas and seawater is beaten when two pressure of pressure gauge reaches 1MPa
Valve opening door one carries out coal bed gas extraction, it is possible to reduce coal-bed gas disaster, meanwhile, moisture content increases in coal seam, can drop
Self raising flour dirt disaster and coal and gas prominent disaster.
The seawater can be the seawater that tank takes directly from ocean, be also possible to the class configured according to the component of seawater
Sea water solution.
The utility model has the advantages that the anti-disaster method of coal-bed flooding of the present invention be based on seawater corrosion characteristic so that solution invaded coal layer when
Between accelerate, the advantages that sphere of action in coal seam increases, coal seam can be efficiently solved and soak difficult problem；Seawater is name
The liquid mineral products of symbol in fact, for the mankind, water volume that can be utilized is not limited, and is a kind of Eco-friendly resource, symbol
Green Development theory is closed, the requirements of one's work such as underground coal mine regional gas control are met.
Detailed description of the invention
Fig. 1 is that a kind of coal-bed flooding based on seawater corrosion of the invention is taken precautions against natural calamities embodiment of the method schematic diagram.
In figure: 1-seawater, 2-water tanks, 3-water injecting pumps, 4-sealing materials, 5-coal seams, 6-water injection holes, 7-water fillings
Pipe, 8-pressure gauges one, 9-drainage tubes, 10-valves one, 11-valves two, 12-escape pipes, 13-ventholes, 14-extractions
Drilling, 15-valves three, 16-minerals, 17-cracks, 18-pressure gauges two.
Specific embodiment:
The specific embodiment of the invention is further described with reference to the accompanying drawing:
Shown in Fig. 1, a kind of anti-disaster method of coal-bed flooding based on seawater corrosion is drilled through to mash gas extraction coal seam 5 first
Radius is the extraction borehole 14 of 110mm, and 14 center cut of extraction borehole is at " jujube nucleon bodies "；Apart from 14 hole of extraction borehole
Wall top 80mm and lower part 80mm drills through venthole 13 and water injection hole 6 respectively, and venthole 13 and 6 terminal of water injection hole are bored with extraction
Hole 14 " jujube nucleon bodies " connection, venthole 13 and 6 radius of water injection hole are 60mm, and escape pipe 12 is installed in venthole 13,
Water injection hole 6 installs water injection pipe 7；Gas drainage pipe 9 is sent to inside extraction borehole 14, by sealing material 4 using conventional envelope
Hole method is successively sealed extraction borehole 14, venthole 13 and water injection hole 6；The seawater 1 of preparation is packed into water tank 2, even
Water receiving case 2 and water injecting pump 3 close valve 1 and valve 2 11, open valve three (15), open water injecting pump 3, Xiang Liantong's
Seawater 1 is injected in " jujube nucleon bodies "；When one 8 pressure of pressure gauge declines suddenly, stopping water injecting pump 3 completes 1 mistake of seawater injection
Journey；Due to containing minerals 16 in the crack 17 in coal seam 5, seawater 1 has 16 groups of corrosivity, seawater 1 and 5 internal mineral matter of coal seam
Part reaction, increases 17 space of crack in coal seam 5, increases the permeability of gas and seawater 1, when 2 18 pressure of pressure gauge reaches
When 1MPa, opens valve 1 and carry out coal bed gas extraction, it is possible to reduce coal-bed gas disaster, meanwhile, moisture content in coal seam 5
Increase, dust disaster and coal and gas prominent disaster can be reduced.Seawater 1 can be the seawater that tank takes directly from ocean,
It can be the class sea water solution configured according to the component of seawater 1.It is a kind of through the invention to be based on the coal-bed flooding of seawater corrosion characteristic
Anti- disaster method, so that the advantages that time of solution invaded coal layer accelerates, the sphere of action in coal seam increases, can effectively solve
Certainly difficult problem is soaked in coal seam；Seawater is liquid mineral products worthy of the name, and for the mankind, water volume that can be utilized is unrestricted
, and be a kind of Eco-friendly resource, meet Green Development theory, meets the work such as underground coal mine regional gas control
It needs.
Claims (2)
1. a kind of anti-disaster method of coal-bed flooding based on seawater corrosion, which comprises the steps of:
A. to mash gas extraction coal seam (5) drill through radius be 110mm extraction borehole (14), extraction borehole (14) center cut at
" jujube nucleon bodies "；
B. venthole (13) and water injection hole (6) are being drilled through respectively apart from extraction borehole (14) hole wall top 80mm and lower part 80mm,
Venthole (13) and water injection hole (6) terminal are connected to extraction borehole (14) " jujube nucleon bodies ", venthole (13) and water filling
Hole (6) radius is 60mm, is installed escape pipe (12) in venthole (13), water injection hole (6) installs water injection pipe (7)；
C., gas drainage pipe (9) is sent to extraction borehole (14) is internal, by sealing material (4) using conventional method for sealing according to
It is secondary that extraction borehole (14), venthole (13) and water injection hole (6) are sealed；
D. the seawater of preparation (1) is packed into water tank (2), connects water tank (2) and water injecting pump (3), close valve one (10) and valve
Two (11) of door, are opened valve three (15), are opened water injecting pump (3), inject seawater (1) in " the jujube nucleon bodies " of Xiang Liantong；
E. when pressure gauge one (8), pressure declines suddenly, stops water injecting pump (3), completes seawater injection (1) process；
F. due to containing minerals (16) in the crack (17) of coal seam (5), seawater (1) has corrosivity, seawater (1) and coal seam
(5) internal mineral matter (16) component reacts, and increases crack (17) space of coal seam (5), increases the infiltration of gas and seawater (1)
Property, it when pressure gauge two (18) pressure reaches 1MPa, opens valve one (10) and carries out coal bed gas extraction, it is possible to reduce coal seam watt
This disaster, meanwhile, coal seam (5) interior moisture content increases, and can reduce dust disaster and coal and gas prominent disaster.
2. the anti-disaster method of a kind of coal-bed flooding based on seawater corrosion according to claim 1, it is characterised in that: seawater
(1) it is tank takes directly from ocean seawater, or the class sea water solution configured according to the component of seawater (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178414.3A CN107975359B (en) | 2017-11-23 | 2017-11-23 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711178414.3A CN107975359B (en) | 2017-11-23 | 2017-11-23 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
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| Publication Number | Publication Date |
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| CN107975359A CN107975359A (en) | 2018-05-01 |
| CN107975359B true CN107975359B (en) | 2019-12-03 |
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| CN201711178414.3A Active CN107975359B (en) | 2017-11-23 | 2017-11-23 | A kind of anti-disaster method of coal-bed flooding based on seawater corrosion |
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| CN109538198B (en) * | 2018-11-12 | 2022-06-14 | 辽宁大学 | Experimental device for preventing and treating coal seam disaster gas injection bubble water and punching integration and application |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518412A (en) * | 2011-12-29 | 2012-06-27 | 郑州大学 | Method for mining coal and gas by hydraulic jet grouting washout |
| CN104500010A (en) * | 2014-12-30 | 2015-04-08 | 湖南省煤炭科学研究院 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
| CN105114116A (en) * | 2015-07-30 | 2015-12-02 | 山东科技大学 | Method for strengthening regional gas extraction through hydro-thermal coupling fracturing |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10337296B2 (en) * | 2014-10-14 | 2019-07-02 | Red Willow Production Company | Gas lift assembly |
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- 2017-11-23 CN CN201711178414.3A patent/CN107975359B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518412A (en) * | 2011-12-29 | 2012-06-27 | 郑州大学 | Method for mining coal and gas by hydraulic jet grouting washout |
| CN104500010A (en) * | 2014-12-30 | 2015-04-08 | 湖南省煤炭科学研究院 | Device and method for displacing, exhausting and mining coal seam gas by damp and hot water injection |
| CN105114116A (en) * | 2015-07-30 | 2015-12-02 | 山东科技大学 | Method for strengthening regional gas extraction through hydro-thermal coupling fracturing |
| 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 |
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