CN102889094B - Coal seam water injection system - Google Patents
Coal seam water injection system Download PDFInfo
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- CN102889094B CN102889094B CN201110204015.6A CN201110204015A CN102889094B CN 102889094 B CN102889094 B CN 102889094B CN 201110204015 A CN201110204015 A CN 201110204015A CN 102889094 B CN102889094 B CN 102889094B
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Abstract
The invention discloses a coal seam water injection system which comprises a pulse power subsystem and a water injection subsystem, wherein a water outlet of the water injection subsystem is communicated with a coal seam to be subjected to water injection of a set area so as to inject water into the coal seam to be subjected to water injection; and a liquid outlet of the pulse power subsystem is communicated with the coal seam to be subjected to water injection of the set area so as to provide hydraulic pulse to the coal seam to be subjected to water injection. According to the coal seam water injection system, the water injection of the coal seam with poor air permeability can be effectively realized, and the coal seam water injection system has the advantages of simple water injection operation and good effect.
Description
Technical field
The present invention relates to water injection technology, particularly relate to a kind of water injection system for coal seams.
Background technology
In coal seam, the gas of more than 90% is composed in the hole and crack that there is coal seam with the form of absorption.In not yet exploitation or undisturbed coal seam, methane gas keeps dynamic adsorption equilibrium.After coal seam is exploited, the crack in coal seam is exposed, and the gas bearing state of balance is broken.A large amount of methane gas constantly desorbs from coal seam, is migrated to tunnel by the hole in coal seam, microfissure, crack or is done in face.Current most colliery is utilizing high power coal-winning machine and mining production practice, when every layer of water content is low, coal dust generation will be caused to increase, not only safety in production will be constituted a threat to, also because production environment worsens, directly damage the healthy of workman.Therefore, if administer taking effective measures of gas and coal dust, just likely gas and coal-dust explosion is caused.
The generation of pre-gas prevention and coal dust disaster is the work ensureing the Safety of Coal Mine Production most important thing always effectively.In numerous preventive action, in coal seam, water filling is simple and effective and method that is that effect a permanent cure.This is because prewet in process in coal-bed flooding, due to expanded and the chemical and physicochemical effect of the pressure of fracture surface, interlayer and mineral money, the mechanical property of coal is changed, plasticity increases, hardness and intensity reduce, coal seam is caused to loosen, the stress decreasing inside, coal seam concentrates the speed with Methane Diffusion, the coal dust amount generated in coal shattering process will reduce to some extent, and gas emission also reduces, generally, bed moisture increase the more, the reduced rate of gas emission is larger, and meanwhile, the coal dust that coal fragmentation generates afterwards is also fewer.Coal-bed flooding tool has the following advantages as can be seen here: first, can soften coal seam; Reduce cut and crushing energy, reduce the damage of equipment and improve recovery ratio; Secondly, the generation of fire can be avoided; Again, the harm of bump can be prevented; Finally, workplace temperature can be reduced.Make coal seam moistening and softening, must make there is water in coal seam.General use flood pattern is carried coal and is carried out water flood operations.Current flood pattern generally adopts down-hole static pressure water filling or high-pressure hydraulic pump pressure water injection.
At least there is following problem in prior art: first, and static pressure water filling is only applicable to the good coal seam of gas permeability, uses static pressure water filling cannot realize the water filling work in the poor coal seam of gas permeability; Secondly, the limited pressure that high-pressure hydraulic pump pressure water injection provides, and along with the increase of water injecting pump pressure, the operation and maintenance of equipment requires also corresponding raising.
Summary of the invention
The invention provides a kind of water injection system for coal seams, in order to realize the effective water filling to the coal seam of poor air permeability.
The invention provides a kind of water injection system for coal seams, comprising: pulsed power subsystem and water filling subsystem;
The delivery port of described water filling subsystem treats that water filling coal seam is communicated with, to treat water filling coal-bed flooding to described with setting regions;
The liquid outlet of described pulsed power subsystem with treat described in described setting regions that water filling coal seam is communicated with, with to treating described in this region that water filling coal seam provides hydraulic impulse.
Water injection system for coal seams as above, preferably: described pulsed power subsystem comprises water-hammer, water pump and storage tank;
The liquid outlet of the high pressure cylinder of described water-hammer is as the liquid outlet of described pulsed power subsystem;
The low pressure (LP) cylinder of described water-hammer is communicated with the weep hole of described water pump;
The inlet opening of described water pump is communicated with described storage tank.
Water injection system for coal seams as above, preferably: described pulsed power subsystem also comprises fire-proof motor and base;
Described storage tank, water pump and fire-proof motor are all fixedly installed on described base;
Described fire-proof motor is connected with described water pump, to provide power to described water pump;
Described water-hammer is fixedly installed on described storage tank.
Water injection system for coal seams as above, preferably: also comprise water injection pipe, treat in water filling coal seam described in the pipe clip of described water injection pipe outlet place end is located at, treat the outside in water filling coal seam described in the entrance of described water injection pipe is positioned at, and described entrance is communicated with liquid outlet with described delivery port respectively.
Water injection system for coal seams as above, preferably: also comprise tee junction, one of them joint of described tee junction is communicated with described entrance, and two other joint of described tee junction is communicated with liquid outlet with described delivery port respectively.
Water injection system for coal seams as above, preferably:
Also comprise coal petrography particle filtering tank;
Described coal petrography particle filtering tank comprises tank body and is arranged on the screen pack in described tank body, and described tank body two ends are opening;
One end of described tank body is communicated with described entrance, and the other end is communicated with described tee junction.
Water injection system for coal seams as above, preferably:
Described water filling subsystem comprises static pressure water injection pipe and static pressure compression pump;
The delivery port of described static pressure water injection pipe is as the delivery port of described water filling subsystem;
The water inlet of described static pressure water injection pipe is communicated with described static pressure compression pump;
Described static pressure compression pump is used for water to pump into described static pressure water injection pipe.
Water injection system for coal seams as above, preferably:
Be provided with one way valve between described static pressure water injection pipe and described tee junction, described one way valve is used for conducting water flows to described water injection pipe path from described static pressure water injection pipe.
Water injection system for coal seams as above, preferably:
Described static pressure water injection pipe is provided with pressure meter and water meter;
Described pressure meter is for showing the hydraulic pressure value in described static pressure water injection pipe;
Described water meter is for showing the injection flow in described static pressure water injection pipe.
Water injection system for coal seams as above, preferably: described static pressure water injection pipe is provided with valve;
Described valve enters the path of the water in described water meter for conducting or cut-out.
Water injection system for coal seams provided by the invention, is provided with pulsed power subsystem, to treating that water filling coal seam provides pulse hydraulic, can treat the robust construction in water filling coal seam to accelerate the failure, making it loose easy water filling.In the injecting process, the action of pulsed power subsystem and water filling subsystem is not successively limited, and such as, first can treat water filling coal seam and apply pulse hydraulic, and then carry out water filling; Also can hocket, first water filling, until difficult water injection, then stops water filling, and to treating that water filling coal seam applies pulse hydraulic, and then continue water filling; Can also carry out, when carrying out, pulse hydraulic along with the water in water filling subsystem injection coal seam, can be transmitted to by the water crack trace in note coal seam, produces powerful hydraulic blow, contribute to further expanding of water crack gap to deep fractures crack by hydraulic impulse simultaneously simultaneously.Water injection system for coal seams provided by the invention, effectively can realize the water filling in the coal seam to poor air permeability, and water flood operations is simple, effective.
Accompanying drawing explanation
The schematic diagram of the water injection system for coal seams that Fig. 1 provides for the embodiment of the present invention one.
The schematic diagram of the water injection system for coal seams that Fig. 2 provides for the embodiment of the present invention two.
The schematic diagram of the water injection system for coal seams that Fig. 3 provides for the embodiment of the present invention three.
Reference numeral:
1-pulsed power subsystem; 2-water filling subsystem; 3-treats water filling coal seam;
4-high-pressure rubber pipe; 5-low pressure hose; 6-water injection pipe;
7-tee junction; 8-coal petrography particle filtering tank; 9-pressure meter;
10-water meter; 11-liquid outlet; 12-water-hammer;
13-water pump; 14-storage tank; 15-fire-proof motor;
16-base; 17-valve; 18-one way valve;
121-high pressure cylinder; 123-low pressure (LP) cylinder; 131-weep hole;
132-inlet opening; 21-delivery port; 22-static pressure water injection pipe;
23-static pressure compression pump; 61-entrance.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of water injection system for coal seams, comprising: pulsed power subsystem and water filling subsystem; With setting regions, the delivery port of water filling subsystem treats that water filling coal seam is communicated with, with to treating water filling coal-bed flooding; With setting regions, the liquid outlet of pulsed power subsystem treats that water filling coal seam is communicated with, to treat that water filling coal seam provides hydraulic impulse to this region.
The water injection system for coal seams that the embodiment of the present invention provides, effectively can realize the water filling in difficult water filling coal seam, it has pulsed power subsystem, in the injecting process, pulsed power subsystem can with the frequency of setting to treating that water filling coal seam provides pulsed power, pulsed power is a kind of alternating force, under the prerequisite of the size of identical power, the destructiveness of alternating force to coal seam is greater than the breakdown speed of stability force to coal seam, namely pulsed power subsystem is adopted can effectively to destroy the stability treating water filling coal seam, coal seam effectively can shake and splits or shake logical by crack originally obstructed in coal seam by the instantaneous high pressure that pulsed power produces, the water that water filling subsystem injects just infiltrates coal body smoothly by these cracks, reach quick, the object of even moistening coal body.In addition, pulsed power subsystem provided by the present invention, for treating that water filling coal seam provides hydraulic impulse, liquid can be water or anti-icing fluid etc., and this is also make use of the incompressible character of liquid.Be understandable that, the sphere of action of the pulse hydraulic that pulsed power subsystem provides is limited, to when the water filling coal-bed flooding, need ensure that pulse hydraulic acts on treating on water filling coal seam of setting regions.
Embodiment one
The schematic diagram of the water injection system for coal seams that Fig. 1 provides for the embodiment of the present invention one.The embodiment of the present invention one provides a kind of water injection system for coal seams, comprising: pulsed power subsystem 1 and water filling subsystem 2; With setting regions, the delivery port 21 of water filling subsystem 2 treats that water filling coal seam 3 is communicated with, with to treating water filling coal seam 3 water filling; With setting regions, the liquid outlet 11 of pulsed power subsystem 1 treats that water filling coal seam 3 is communicated with, to treat that water filling coal seam 3 provides hydraulic impulse to this region.
Pulsed power subsystem and water filling subsystem are connected to treats that the mode in water filling coal seam is not limited, what can be connected to the same area respectively by two pipes treats water filling coal seam, also can be connected to by same pipe and treat water filling coal seam, as long as ensure that pulsed power subsystem and water filling subsystem act on the coal seam of the same area.
The preferred implementation of pulsed power subsystem is: pulsed power subsystem 1 comprises water-hammer 12, water pump 13 and storage tank 14; The liquid outlet of the high pressure cylinder 121 of water-hammer is as the liquid outlet 11 of pulsed power subsystem 1; The low pressure (LP) cylinder 123 of water-hammer 12 is communicated with the weep hole 131 of water pump 13; The inlet opening 132 of water pump 13 is communicated with storage tank 14.In FIG, high pressure cylinder 121 and treat to be communicated with by high-pressure rubber pipe 4 between water filling coal seam 3, is communicated with by low pressure hose 5 between low pressure (LP) cylinder 123 and water pump 13, but is not limited in this.
The water inlet of the low pressure (LP) cylinder of water hammer is provided with valve C and valve D.The aperture of control valve C and valve D, can change the flow entering low pressure (LP) cylinder, and then changes water hammer frequency.Water hammer power foot, and the power provided is easy to control.After the motor energising in water hammer, the water that water pump exports enters the low pressure (LP) cylinder of water-hammer, the water in the high pressure cylinder of water-hammer can be made to produce high instantaneously and propagate in the coal seam by water filling by water injecting pipeline, thus improve the gas permeability in coal seam, also accelerate waterflood injection rate, improve the scope of application and the effect of water filling subsystem.
Further, pulsed power subsystem 1 also comprises fire-proof motor 15 and base 16; Storage tank 14, water pump 13 and fire-proof motor 15 are all fixedly installed on base 16; Fire-proof motor 15 is connected with water pump 13, to provide power to water pump 13; Water-hammer 12 is fixedly installed on storage tank 14.
Be provided with the pulsed power subsystem of fire-proof motor and base, function is more perfect, is also convenient to transport.
The water injection system for coal seams that the embodiment of the present invention one provides, is provided with pulsed power subsystem, to treating that water filling coal seam provides pulse hydraulic, can treat the robust construction in water filling coal seam to accelerate the failure, making it loose easy water filling.In the injecting process, the action of pulsed power subsystem and water filling subsystem is not successively limited, and such as, first can treat water filling coal seam and apply pulse hydraulic, and then carry out water filling; Also can hocket, first water filling, until difficult water injection, then stops water filling, and to treating that water filling coal seam applies pulse hydraulic, and then continue water filling; Can also carry out, when carrying out, pulse hydraulic along with the water in water filling subsystem injection coal seam, can be transmitted to by the water crack trace in note coal seam, produces powerful hydraulic blow, contribute to further expanding of water crack gap to deep fractures crack by hydraulic impulse simultaneously simultaneously.
The water injection system for coal seams that the embodiment of the present invention one provides, effectively can realize the water filling in the coal seam to poor air permeability, and water flood operations is simple, effective.
Embodiment two
The schematic diagram of the water injection system for coal seams that Fig. 2 provides for the embodiment of the present invention two.The embodiment of the present invention two is on the technical scheme basis of embodiment one, preferably, water injection system for coal seams also comprises water injection pipe 6, the pipe clip that water injection pipe 6 exports place end is located at treats 3 li, water filling coal seam, the entrance 61 of water injection pipe 6 is positioned at the outside for the treatment of water filling coal seam 3, and entrance 61 is communicated with liquid outlet 11 with delivery port 21 respectively.
Pulsed power subsystem and water filling subsystem are connected to by same water injection pipe and treat water filling coal seam, can simplify the structure of whole system.In practical application, the surrounding of water injection pipe can also arrange sealing material, to avoid cinder on the impact of water injection pipe.Water injection pipe can be rigid rubber pipe or steel pipe.
Optionally: water injection system for coal seams also comprises tee junction 7, one of them joint of tee junction 7 is communicated with entrance 61, and two other joint of tee junction 7 is communicated with liquid outlet 11 with delivery port 21 respectively.Tee junction effectively can realize the connection of three pipes, and annexation is simple.
Preferably, water injection system for coal seams also comprises coal petrography particle filtering tank 8; Coal petrography particle filtering tank 8 comprises tank body and is arranged on the screen pack (not shown) in tank body, and tank body two ends are opening; One end of tank body is communicated with entrance 61, and the other end is communicated with tee junction 7.
If do not arrange coal petrography particle filtering tank, the entrance of water injection pipe is directly communicated with one of them joint of tee junction, if be provided with coal petrography particle filtering tank, is communicated with each other between the entrance of water injection pipe and tee junction by coal petrography particle filtering tank.Water in water injection pipe has two kinds of flow directions, one is that the current direction in water injection pipe treats water filling coal seam when pulsed power subsystem or the water filling of water filling subsystem, and when above-mentioned two subsystems stop action, water in water injection pipe can reflux, and is generally doped with the impurity such as cinder in the water of backflow.Coal petrography particle filtering tank is set, can stop that on the one hand trash flow in pulsed power subsystem or water filling subsystem is to water injection pipe, on the other hand, also trash flow in water injection pipe can be stoped to pulsed power subsystem or water filling subsystem, again on the one hand, can also be blocked in the injecting process, the coal petrography particle deposited in water injection pipe enters pulsed power subsystem and water filling subsystem.
Two subsystems are communicated with water injection pipe by same water injection pipe by the water injection system for coal seams that the embodiment of the present invention two provides, simple and reliable, workable.
Embodiment three
The schematic diagram of the water injection system for coal seams that Fig. 3 provides for the embodiment of the present invention three.The embodiment of the present invention three on the technical scheme basis of above-described embodiment, preferably.Water filling subsystem 2 comprises static pressure water injection pipe 22 and static pressure compression pump 23; The delivery port of static pressure water injection pipe 22 is as the delivery port 21 of water filling subsystem; The water inlet (not shown) of static pressure water injection pipe 22 is communicated with static pressure compression pump (not shown); Static pressure compression pump is used for pressure injection water pipe 22 in meditation for water pump.
After increasing pulsed power subsystem, the structure of water filling subsystem can not be affected, in addition, be provided with pulsed power subsystem, existing water filling subsystem can be used to carry out water filling to coal seam, and flood effectiveness be good.
In practical application, be provided with one way valve 18 between static pressure water injection pipe 22 and tee junction 7, one way valve 18 flows to the path of water injection pipe 6 from static pressure water injection pipe 22 for conducting water.
During the effect of pulsed power subsystem, pulsed power may be passed to water filling subsystem, treating water filling coal seam, being provided with one way valve between static pressure water injection pipe and tee junction for ensureing that pulsed power is effectively passed to.
Preferably, static pressure water injection pipe 22 is provided with pressure meter 9 and water meter 10; Pressure meter 9 is for showing the hydraulic pressure value in static pressure water injection pipe 22; Water meter 10 is for showing the injection flow in static pressure water injection pipe 22.According to the registration of pressure meter and water meter, can effectively control to treating the water yield that water filling coal seam is injected.
Further, static pressure water injection pipe 22 is provided with valve 17; Valve 17 enters the path of the water in water meter 10 for conducting or cut-out.
The water injection system for coal seams that the embodiment of the present invention three provides, use static pressure water injection pipe and static pressure compression pump can realize the effective water filling treating water filling coal seam, and it is with low cost, be understandable that, water filling subsystem can also select high pressure water injection system, flood effectiveness can be better, but old of the operation of equipment also can increase.
The water injection system for coal seams that the embodiment of the present invention provides, be particularly useful for quick, effective water filling of the very poor difficult injecting layer of coal seam, particularly gas permeability, effectively prevent Yin Wasi and excessive amount of dust in seam mining process and cause safety of coal mines problem, and production efficiency and the economic benefit in colliery can be improved.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a water injection system for coal seams, is characterized in that, comprising: pulsed power subsystem and water filling subsystem;
The delivery port of described water filling subsystem treats that water filling coal seam is communicated with, to treat water filling coal-bed flooding to described with setting regions;
The liquid outlet of described pulsed power subsystem with treat described in described setting regions that water filling coal seam is communicated with, with to treating described in this region that water filling coal seam provides hydraulic impulse;
Described pulsed power subsystem comprises water-hammer, water pump and storage tank;
The liquid outlet of the high pressure cylinder of described water-hammer is as the liquid outlet of described pulsed power subsystem;
The low pressure (LP) cylinder of described water-hammer is communicated with the weep hole of described water pump; The water inlet of described low pressure (LP) cylinder installs two valves, in order to change water hammer frequency;
The inlet opening of described water pump is communicated with described storage tank;
Also comprise water injection pipe, treat in water filling coal seam described in the pipe clip of described water injection pipe outlet place end is located at, treat the outside in water filling coal seam described in the entrance of described water injection pipe is positioned at, and described entrance is communicated with liquid outlet with described delivery port respectively;
Also comprise tee junction, one of them joint of described tee junction is communicated with described entrance, and two other joint of described tee junction is communicated with liquid outlet with described delivery port respectively;
Also comprise coal petrography particle filtering tank;
Described coal petrography particle filtering tank comprises tank body and is arranged on the screen pack in described tank body, and described tank body two ends are opening;
One end of described tank body is communicated with described entrance, and the other end is communicated with described tee junction.
2. water injection system for coal seams according to claim 1, is characterized in that: described pulsed power subsystem also comprises fire-proof motor and base;
Described storage tank, water pump and fire-proof motor are all fixedly installed on described base;
Described fire-proof motor is connected with described water pump, to provide power to described water pump;
Described water-hammer is fixedly installed on described storage tank.
3. water injection system for coal seams according to claim 1, is characterized in that:
Described water filling subsystem comprises static pressure water injection pipe and static pressure compression pump;
The delivery port of described static pressure water injection pipe is as the delivery port of described water filling subsystem;
The water inlet of described static pressure water injection pipe is communicated with described static pressure compression pump;
Described static pressure compression pump is used for water to pump into described static pressure water injection pipe.
4. water injection system for coal seams according to claim 3, is characterized in that:
Be provided with one way valve between described static pressure water injection pipe and described tee junction, described one way valve is used for conducting water flows to described water injection pipe path from described static pressure water injection pipe.
5. water injection system for coal seams according to claim 3, is characterized in that:
Described static pressure water injection pipe is provided with pressure meter and water meter;
Described pressure meter is for showing the hydraulic pressure value in described static pressure water injection pipe;
Described water meter is for showing the injection flow in described static pressure water injection pipe.
6. water injection system for coal seams according to claim 3, is characterized in that: described static pressure water injection pipe is provided with valve;
Described valve enters the path of the water in described water meter for conducting or cut-out.
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| CN201110204015.6A CN102889094B (en) | 2011-07-20 | 2011-07-20 | Coal seam water injection system |
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| CN201110204015.6A CN102889094B (en) | 2011-07-20 | 2011-07-20 | Coal seam water injection system |
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| CN102889094A CN102889094A (en) | 2013-01-23 |
| CN102889094B true CN102889094B (en) | 2015-02-25 |
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| CN103161478B (en) * | 2013-03-25 | 2015-05-20 | 中国矿业大学 | Impulse-type grouting method |
| CN103993901B (en) * | 2014-04-25 | 2018-04-20 | 河南理工大学 | A kind of projecting coal bed drilling waterpower is handled up anti-reflection method |
| CN107989586B (en) * | 2017-10-18 | 2018-12-25 | 西安交通大学 | Coal bed gas well remodeling method based on the compound surge formula pressurized water injection of controllable shock wave |
| 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 |
| CN114320432B (en) * | 2022-01-19 | 2023-06-13 | 河南理工大学 | Coal seam water injection wetting method based on mechanical wave resonance |
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| CN2616685Y (en) * | 2003-05-08 | 2004-05-19 | 魏国营 | Hydraulic automatic hole-sealing coal seam water injection device |
| CN100591892C (en) * | 2006-10-12 | 2010-02-24 | 中国矿业大学(北京) | Ore seam injection method during mining process |
| CN100501131C (en) * | 2006-12-08 | 2009-06-17 | 中国矿业大学 | Coal-seam high-pressure pulsating water hammer water-infusion method and apparatus thereof |
| CN202064924U (en) * | 2011-04-29 | 2011-12-07 | 中国矿业大学 | Hydraulic fracturing equipment in coal mine |
| CN202250153U (en) * | 2011-07-20 | 2012-05-30 | 平安煤矿瓦斯治理国家工程研究中心有限责任公司 | Water injection system for coal seams |
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