CN108825296A - A kind of static anti-reflection heating promotion gas pumping method of solid matter - Google Patents
A kind of static anti-reflection heating promotion gas pumping method of solid matter Download PDFInfo
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- CN108825296A CN108825296A CN201810795933.2A CN201810795933A CN108825296A CN 108825296 A CN108825296 A CN 108825296A CN 201810795933 A CN201810795933 A CN 201810795933A CN 108825296 A CN108825296 A CN 108825296A
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- borehole
- extraction
- injection pipe
- water
- draining
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- 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
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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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)
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- Environmental & Geological Engineering (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A kind of static anti-reflection heating promotion gas pumping method of solid matter, includes the following steps, CaO and retarder are mixed to get powdered solid mixt；It waits for that extraction region drills out several extraction boreholes in the way of rectangular array in underground, and is connected to gas drainage pipe network and carries out gas drainage；Construction promotees draining borehole between two neighboring extraction borehole；Powdered solid mixt, which is injected into, to be promoted in draining borehole；Water is injected into rush draining borehole by water injection pipe；After the completion of water filling, water injection pipe is shut, retarder reduces the rate that CaO is reacted with water, extends and expands the exothermic time, improves the effect of desorption of mash gas.The present invention, which is set, to be alternately arranged extraction borehole in coal seam first and promotees draining borehole, can be significantly improved coal body gas permeability, be accelerated desorption of mash gas, so that gas drainage efficiency improves 50% or more.This method is safe and reliable, low in cost, simple and easy.
Description
Technical field
The invention belongs to the static anti-reflection heating promotions watt in safety of coal mines production technique field more particularly to a kind of solid matter
This pumping method.
Background technique
Gas drainage is to administer the fundamental means of coal mine gas.As China's coal-mine mining depth is deeper and deeper, coal
Worse and worse, gas pressure and crustal stress are higher and higher, and gas drainage is more and more difficult for layer gas permeability.Currently, China is common
Gas pumping method is promoted mainly to have waterpower measure and explosive blasting measure.Both measures are mainly from raising gas permeability of coal seam
Start with, improves gas pumping effect.Since 90% is adsorption gas in coal seam, how to accelerate adsorption gas and change to free gas
As the problem for restricting gas drainage.Therefore, gas permeability of coal seam can either be improved by finding one kind, and can promote desorption of mash gas
New method has great importance for improving coal mine gas drainage efficiency.
Studies have shown that CaO can expand deformation after meeting water, while generating a large amount of heat.But CaO is reacted with water
Acutely, reaction rate is difficult to control.The materials such as suitable CaO and retarder are selected to form hybrid solid-state substance.Both expansion became
Shape, pressure break coal body generate amount of heat to improve gas permeability, will certainly effectively facilitate gas drainage.
Summary of the invention
In order to solve shortcoming in the prior art, gas permeability of coal seam can be improved but also add the present invention by providing one kind
The static anti-reflection heating of solid matter of fast coal seam desorption promotes gas pumping method.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of static anti-reflection heating rush of solid matter
Into gas pumping method, include the following steps,
（1）, prepare 60 parts of CaO and 5 part of retarder, CaO and retarder are ground to 100~150 μm, be then stirred
It is even, obtain powdered solid mixt；
（2）, in underground wait for that extraction region drills out several extraction boreholes, after the completion of construction, cement in the way of rectangular array
Mortar to extraction borehole carry out sealing of hole, each extraction borehole and be connected to gas drainage pipe network carry out gas drainage；
（3）, between two neighboring extraction borehole construction promote draining borehole, ensure extraction borehole promote draining borehole coverage it
It is interior, sealing of hole is carried out to draining borehole is promoted using cement mortar, cement mortar solidifies to form sealing section, and reserve material injection pipe and
Water injection pipe, water injection pipe are located at the topmost of sealing section；
（4）, material injection pipe by powdery material blanking device connect underground pressure air pipe, by step（1）The powder of middle preparation
Last shape solid mixt is put into powdery material blanking device, and powdered solid mixt is injected into and is promoted in draining borehole；Water filling
Play the role of being vented outwards in hole；Powdery material blanking device is unloaded after filling, and shuts material injection pipe；
（5）, by water injection pipe to promoting to inject water in draining borehole, it is sharp due to promoting draining borehole positioned at two neighboring extraction borehole between
With the exothermic characteristic of CaO water-swellable, heating promotes the desorption of mash gas of extraction borehole while carrying out pressure break to coal body；
（6）, after the completion of water filling, shut water injection pipe, retarder reduces the rate that CaO react with water, the extension expansion exothermic time,
Improve the effect of desorption of mash gas.
Retarder is gluconate.
When construction layer-through drilling, extraction borehole and the bottom hole spacing for promoting draining borehole are 8-10m；When concordant of constructing drilling, take out
Borehole and the bottom hole spacing for promoting draining borehole are 6-8m.
Powdery material blanking device includes the upper coarse and lower fine container in circular cone cartridge type, and container lower port is connected with air duct,
One end of air duct is connect with the outer end of material injection pipe, and the other end of air duct is connect with pressure air pipe, is arranged in air duct
There is the volume damper of neighbouring pressure air pipe, container top center is provided with fire-proof motor, and the main shaft of fire-proof motor is vertically downward
And it is coaxial be connected with the agitating shaft extending into container, helical blade is provided on agitating shaft, in container lower part setting it is limited
Position frame, agitating shaft lower end pass through and are rotatablely connected with position-limited rack.
Step（4）Detailed process be that powdered solid mixt is put into container, open fire-proof motor, fire-proof motor
Agitating shaft and helical blade rotation are driven, powdered solid mixt is fed downwardly into air duct by helical blade, high-pressure blast
The powdered solid mixt in air duct will be dropped into and be transported to and promoted in draining borehole, air quantity is adjusted according to the size of blanking velocity
The aperture of regulating valve avoids air feed powder in tube shape solid mixt from blocking.
By adopting the above technical scheme, the present invention mainly utilizes the exothermic characteristic of CaO water-swellable, carries out the same of pressure break coal body
Shi Jiare promotes desorption of mash gas, to achieve the purpose that promote gas drainage.Rush is opened up between two neighboring extraction borehole to take out
Drilling, enables CaO water-swellable heat release to influence adjacent extraction borehole, improves the effect of desorption of mash gas.And design injection
The feeding device dedicated of the powdered solid mixt of CaO and retarder is not easy to plug using the pressure air pipe of underground, is convenient for
Operation.It is appropriate to the water for promoting draining borehole injection simultaneously, because promoting to have many ponding in draining borehole and seep water participates in reaction.
The present invention, which is set, to be alternately arranged extraction borehole in coal seam first and promotees draining borehole, is existed followed by a kind of solid matter
Promote expansion in draining borehole, hair thermal property, by solid state powder mass expansion pressure break coal body, improves coal body gas permeability, meanwhile, lead to
The fever of solid state powder substance is crossed, gas fast desorption is promoted, achievees the purpose that promote gas drainage in terms of two.The technology can be with
Coal body gas permeability is significantly improved, desorption of mash gas is accelerated, so that gas drainage efficiency improves 50% or more.This method is safe and reliable, at
This is cheap, simple and easy.
Detailed description of the invention
Fig. 1 is the sectional schematic diagram that the static anti-reflection heating of solid matter promotes gas pumping method in the present invention；
Fig. 2 is the arranged crosswise floor map of extraction borehole and rush draining borehole of the invention；
Fig. 3 is the structural schematic diagram of powdery material blanking device in Fig. 1.
Specific embodiment
As shown in Figure 1-Figure 3, the static anti-reflection heating promotion gas pumping method of a kind of solid matter of the invention, including with
Lower step,
（1）, prepare 60 parts of CaO and 5 part of retarder, CaO and retarder are ground to 100~150 μm, be then stirred
It is even, obtain powdered solid mixt；
（2）, in underground wait for that extraction region drills out several extraction boreholes 1, after the completion of construction, cement in the way of rectangular array
Mortar to extraction borehole 1 carry out sealing of hole, each extraction borehole 1 and be connected to gas drainage pipe network 5 carry out gas drainage；
（3）, between two neighboring extraction borehole 1 construction promote draining borehole 2, ensure extraction borehole 1 promote 2 coverage of draining borehole
Within, sealing of hole is carried out to draining borehole 2 is promoted using cement mortar, cement mortar solidifies to form sealing section, and reserves material injection
Pipe 3 and water injection pipe（Do not illustrate in figure）, water injection pipe is located at the topmost of sealing section；
（4）, material injection pipe 3 by powdery material blanking device 14 connect underground pressure air pipe 4, by step（1）Middle preparation
Powdered solid mixt be put into powdery material blanking device 14, by powdered solid mixt be injected into promote draining borehole 2
It is interior；Water injection hole plays the role of being vented outwards；Powdery material blanking device 14 is unloaded after filling, and shuts material injection pipe 3；
（5）, by water injection pipe to promote draining borehole 2 in inject water, due to promote draining borehole 2 between two neighboring extraction borehole 1,
Using the exothermic characteristic of CaO water-swellable, heating promotes the desorption of mash gas of extraction borehole 1 while carrying out pressure break to coal body；
（6）, after the completion of water filling, shut water injection pipe, retarder reduces the rate that CaO react with water, the extension expansion exothermic time,
Improve the effect of desorption of mash gas.
Retarder is gluconate.
When construction layer-through drilling, extraction borehole 1 and the bottom hole spacing for promoting draining borehole 2 are 8-10m；When concordant of constructing drilling,
Extraction borehole 1 and the bottom hole spacing for promoting draining borehole 2 are 6-8m.
Powdery material blanking device 14 includes the upper coarse and lower fine container 6 in circular cone cartridge type, and 6 lower port of container is connected with air feed
One end of pipe 7, air duct 7 is connect with the outer end of material injection pipe 3, and the other end of air duct 7 is connect with pressure air pipe 4, air feed
The volume damper 8 of neighbouring pressure air pipe 4 is provided on pipe 7,6 center of top of container is provided with fire-proof motor 9, fire-proof motor 9
Main shaft vertically downward and it is coaxial be connected with the agitating shaft 10 extending into container 6, be provided with helical blade on agitating shaft 10
11, lower part is provided with position-limited rack 12 in container 6, and 10 lower end of agitating shaft passes through and is rotatablely connected with position-limited rack 12.
Step（4）Detailed process be that powdered solid mixt is put into container 6, open fire-proof motor 9, anti-explosion electric
Machine 9 drives agitating shaft 10 and helical blade 11 to rotate, and powdered solid mixt is fed downwardly into air duct 7 by helical blade 11
Interior, high-pressure blast, which will drop into the powdered solid mixt in air duct 7 and be transported to, to be promoted in draining borehole 2, according to blanking velocity
Size adjusts the aperture of volume damper 8, avoids powdered solid mixt blocking in air duct 7.
The wind direction of arrow in Fig. 3.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (5)
1. a kind of static anti-reflection heating of solid matter promotes gas pumping method, it is characterised in that：Include the following steps,
（1）, prepare 60 parts of CaO and 5 part of retarder, CaO and retarder are ground to 100~150 μm, be then stirred
It is even, obtain powdered solid mixt；
（2）, in underground wait for that extraction region drills out several extraction boreholes, after the completion of construction, cement in the way of rectangular array
Mortar to extraction borehole carry out sealing of hole, each extraction borehole and be connected to gas drainage pipe network carry out gas drainage；
（3）, between two neighboring extraction borehole construction promote draining borehole, ensure extraction borehole promote draining borehole coverage it
It is interior, sealing of hole is carried out to draining borehole is promoted using cement mortar, cement mortar solidifies to form sealing section, and reserve material injection pipe and
Water injection pipe, water injection pipe are located at the topmost of sealing section；
（4）, material injection pipe by powdery material blanking device connect underground pressure air pipe, by step（1）The powder of middle preparation
Last shape solid mixt is put into powdery material blanking device, and powdered solid mixt is injected into and is promoted in draining borehole；Water filling
Play the role of being vented outwards in hole；Powdery material blanking device is unloaded after filling, and shuts material injection pipe；
（5）, by water injection pipe to promoting to inject water in draining borehole, it is sharp due to promoting draining borehole positioned at two neighboring extraction borehole between
With the exothermic characteristic of CaO water-swellable, heating promotes the desorption of mash gas of extraction borehole while carrying out pressure break to coal body；
（6）, after the completion of water filling, shut water injection pipe, retarder reduces the rate that CaO react with water, the extension expansion exothermic time,
Improve the effect of desorption of mash gas.
2. the static anti-reflection heating of a kind of solid matter according to claim 1 promotes gas pumping method, it is characterised in that：
Retarder is gluconate.
3. the static anti-reflection heating of a kind of solid matter according to claim 1 promotes gas pumping method, it is characterised in that：
When construction layer-through drilling, extraction borehole and the bottom hole spacing for promoting draining borehole are 8-10m；Construct concordant drilling when, extraction borehole with
The bottom hole spacing for promoting draining borehole is 6-8m.
4. the static anti-reflection heating of a kind of solid matter according to claim 1 promotes gas pumping method, it is characterised in that：
Powdery material blanking device includes the upper coarse and lower fine container in circular cone cartridge type, and container lower port is connected with air duct, air duct
One end is connect with the outer end of material injection pipe, and the other end of air duct is connect with pressure air pipe, and neighbouring pressure is provided in air duct
The volume damper of air piping, container top center are provided with fire-proof motor, and the main shaft of fire-proof motor is vertically downward and coaxial
It is connected with the agitating shaft extending into container, helical blade is provided on agitating shaft, lower part is provided with position-limited rack in container, stirring
Axis lower end passes through and is rotatablely connected with position-limited rack.
5. the static anti-reflection heating of a kind of solid matter according to claim 4 promotes gas pumping method, it is characterised in that：
Step（4）Detailed process be that powdered solid mixt is put into container, open fire-proof motor, fire-proof motor drive
Powdered solid mixt is fed downwardly into air duct by agitating shaft and helical blade rotation, helical blade, and high-pressure blast will be fallen
The powdered solid mixt entered into air duct, which is transported to, to be promoted in draining borehole, is adjusted air quantity according to the size of blanking velocity and is adjusted
The aperture of valve avoids air feed powder in tube shape solid mixt from blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795933.2A CN108825296A (en) | 2018-07-19 | 2018-07-19 | A kind of static anti-reflection heating promotion gas pumping method of solid matter |
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| CN201810795933.2A CN108825296A (en) | 2018-07-19 | 2018-07-19 | A kind of static anti-reflection heating promotion gas pumping method of solid matter |
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Cited By (4)
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| CN111852392A (en) * | 2020-08-07 | 2020-10-30 | 中煤科工集团重庆研究院有限公司 | Gas extraction borehole leak detection and progressive secondary hole sealing device and using method |
| CN112593906A (en) * | 2020-12-17 | 2021-04-02 | 辽宁工程技术大学 | Coal body heating device and method for promoting gas extraction |
| CN112679149A (en) * | 2020-12-25 | 2021-04-20 | 西安科技大学 | Deep mine heat storage cement mortar preparation and vertical solidification-prevention slurry conveying system and method |
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| CN112679149A (en) * | 2020-12-25 | 2021-04-20 | 西安科技大学 | Deep mine heat storage cement mortar preparation and vertical solidification-prevention slurry conveying system and method |
| CN112679149B (en) * | 2020-12-25 | 2022-01-28 | 西安科技大学 | Deep mine heat storage cement mortar preparation and vertical solidification-prevention slurry conveying system and method |
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Application publication date: 20181116 |