CN101539028B - Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection - Google Patents
Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection Download PDFInfo
- Publication number
- CN101539028B CN101539028B CN2009100834163A CN200910083416A CN101539028B CN 101539028 B CN101539028 B CN 101539028B CN 2009100834163 A CN2009100834163 A CN 2009100834163A CN 200910083416 A CN200910083416 A CN 200910083416A CN 101539028 B CN101539028 B CN 101539028B
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- pneumatic
- control
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a method and an apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection. The apparatus comprises a high-pressure water supply system, a pulse pressure water output system and a pneumatic frequency modulation control system. The pulse pressure water output system is controlled by the pneumatic frequency modulation control system and injects high-pressure water in boreholes in a pulsation manner. Water injection pressure is changed such that water filters into different gaps and pores by injecting pulse high-pressure water in coal beds, namely, by injecting water with the pressure changed periodically, so as to change the mechanical property of the coal body furthest. The pulse high-pressure water is used for discharging free high-pressure mash gas so as to reduce mash gas content in the coal body, improve safety, and reduce or eliminate coal bed outburst and shock hazard. The invention has a simple technology and good control efficiency, and is suitable for preventing and controlling coal or rock dynamic disaster in all coal mines.
Description
Technical field
The present invention relates to a kind of Safety of Coal Mine Production Prevention Technique, relate in particular to a kind of device of high-pressure pulsating water filling control coal rock dynamic disaster.
Background technology
In the Coal Production process, the generation of coal rock dynamic disasters such as coal and gas are outstanding, impulsion pressure causes a tremendous loss of lives through regular meeting, brings great spirit and psychological pressure for the mine worker, simultaneously, also can influence the economic benefit in colliery.In recent years, along with the increase of the pit mining degree of depth and intensity, coal rock dynamic disaster increases year by year, more serious, and more becoming current colliery needs the problem that at first solves.
In existing mine protrusion-dispelling technology, many waterpower measures are obtaining promotion and application, and its characteristics all are that water is as the means of handling coal-bed gas.The waterpower measure can be divided into three major types by character: the first kind, and water as wetting agent, to the moistening coal body of coal-bed flooding, is changed and causes outstanding factor, comprise that the mash gas dynamic in coal seam is learned character and physico-mechanical properties.Second class be water as power, in the coal seam, form artificial cavities, the line of rabbet joint and crack, perhaps enlarge existing crack and impel coal body to be subjected to displacement, reach the effect of release and firedamp drainage, prevent the effect of giving prominence to thereby play.Extrude etc. as sluicing, hydraulic slotted liner technique, fracturing and waterpower.The 3rd class be water as part power, excite the release of outstanding potential, as hydraulic flushing in hole etc.And the means of prevention of impulsion pressure mainly adopts stress relief borehole, presplitting release explosion, brings out measures such as the pre-water filling of explosion and coal seam.
Though above-mentioned prior art has solved subproblem to a certain extent, reduced the generation of coal rock dynamic disaster, but have following shortcoming at least: technology complexity, protrusion-dispelling and protecting against shock effect is undesirable, how further to improve water injection technology, raising protrusion-dispelling and protecting against shock effect just become the present invention and will deal with problems.
Summary of the invention
In view of above-mentioned prior art deficiency, the present invention aims to provide the equipment that a kind of technology is simple, outstanding effect is utilized high-pressure pulsating water filling control coal rock dynamic disaster.
The objective of the invention is to be achieved through the following technical solutions:
A kind of device of high-pressure pulsating water filling control coal rock dynamic disaster, comprise high service system, pulse pressure water output system and pneumatic frequency modulation control system, the pulse pressure water output system is connected with pneumatic frequency modulation control system with high service system respectively, the control that the pulse pressure water output system is accepted pneumatic frequency modulation control system is injected into the water under high pressure pulsation that high service system provides in the boring, inject the pulsation water under high pressure by boring in mine coal seam, the pulsation water under high pressure is meant the water that has certain pressure and pressure cycle variation.Pneumatic frequency modulation control system comprises pneumatic frequency modulation loop and the Pneumatic valve that is used with pneumatic frequency modulation loop, pneumatic frequency modulation loop and Pneumatic valve are communicated with external source of the gas respectively, pulse control is responsible for producing in pneumatic frequency modulation loop, and Pneumatic valve is converted to pulse control signal with external source of the gas and outputs to the pulse pressure water output system.
Described pneumatic frequency modulation loop comprises two two five-way valves, two control air-capacitors and a frequency adjustment valve, and two control air-capacitors and two two five-way valves constitute alternation square wave pulse circuit; The frequency adjustment valve is connected on the regulating loop of two five-way valves, and the gas flow on the regulating loop is flow through in the restriction of frequency adjustment valve.
Described pneumatic frequency modulation loop comprises that also two are regulated air-capacitors, regulates air-capacitor and is connected on the return passage between two five-way valves and two the control air-capacitors, regulates air-capacitors for two and regulates two gas capacities of controlling air-capacitors respectively.
Described pulse pressure water output system comprises reversal valve, delivery port, high-pressure overflow valve, low pressure relief valve, strainer and residual cake valve, and reversal valve is connected on the connecting line between delivery port and the high service system, and reversal valve is accepted the control of Pneumatic valve; High-pressure overflow valve is connected between high service system and the reversal valve, and low pressure relief valve is connected on the current loop of reversal valve; Strainer and residual cake valve are connected between delivery port and the reversal valve.
Described pulse pressure water output system also comprise at least one the cover with the reversal valve parallel connection and with reversal valve current controlling party to opposite reverse reversal valve and delivery port, oppositely reversal valve is accepted the control of Pneumatic valve simultaneously, oppositely reversal valve is connected on the connecting line between high-pressure overflow valve and the reversal valve, and oppositely the current loop of reversal valve is communicated with low pressure relief valve.
By the technical scheme of the invention described above as can be seen, starting point of the present invention is: by the boring on the coal seam being injected the pulsation water under high pressure, on the one hand water is penetrated in different cracks, the hole, increase the wetability of coal body, simultaneously, make the crack constantly connect, enlarge, enlarge wetting radius, maximum magnitude ground changes the physico-mechanical properties in coal seam; On the other hand, act on coal body by periodic pulsation water under high pressure, water under the different pressures can produce the effect repeatedly of " expansion-contraction-expansion " to the crack hole of coal body, and the coal body mechanical property is changed, and lowers or the outstanding danger in elimination coal seam.And the injection of pulsation water under high pressure also helps the discharging of free high pressure gas, reduces the gas bearing capacity in the coal body, improves the safety in production coefficient, guarantees that production safety carries out.
The device of high-pressure pulsating water filling control coal rock dynamic disaster of the present invention, utilize pneumatic frequency modulation control system control impuls press water output system, the water under high pressure pulsation that high service system is provided is injected in the boring, simple in structure, operation is reliable, two delivery ports are under the jointly controlling of Pneumatic valve and reversal valve and reverse reversal valve, remain a delivery port water outlet, the state of another delivery port water inlet, both saved the energy, help in boring, producing pulse again, whole activities is simple, prevention effect is good, when being particularly suitable for preventing and treating coal rock dynamic disaster the boring water filling is used.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
The specific embodiment
The method of the high-pressure pulsating water filling control coal rock dynamic disaster that the present invention is based at first, is punched to mine coal seam from mine laneway, is generally two borings; Then, the pulsation water under high pressure is injected in the boring of mine coal seam, after the pulsation water under high pressure enters in the coal seam, can not only penetrate in different cracks, the hole, increase the wetability of coal body, can also make the crack constantly connect, enlarge, enlarge wetting radius, change the coal seam physico-mechanical properties, simultaneously, the periodically pulsing water under high pressure also can produce the effect repeatedly of " expansion-contraction-expansion " to coal body crack, hole, lowers or the outstanding danger in elimination coal seam.During water filling, the maximum pressure of pulsation water under high pressure is 25MPa, and wherein Mai Dong low pressure and high pressure all can be regulated, and with the prevention effect after the assurance coal-bed flooding and safe in utilization, and the quantity of punching also can be set according to actual needs.
Device below in conjunction with 1 pair of high-pressure pulsating water filling control coal rock dynamic disaster of the present invention of accompanying drawing is further described:
Water filling device with high-pressure pulsating water filling control coal rock dynamic disaster method is used comprises high service system, pneumatic frequency modulation control system and pulse pressure water output system.Wherein, high service system is responsible for the output of water under high pressure, mainly comprises the high-pressure plunger pump 3 of water intaking valve control and the gas source triplet 1 and the air motor 2 of power are provided for high-pressure plunger pump 3.
Pneumatic frequency modulation control system is provided by independent source of the gas dyad 11, and pneumatic frequency modulation control system is responsible for producing the work of air pulse control impuls press water output system.Pneumatic frequency modulation control system comprises pneumatic frequency modulation loop and the Pneumatic valve 12 that is used with pneumatic frequency modulation loop, Pneumatic valve 12 is two five-way valves of a gas control, pneumatic frequency modulation loop and Pneumatic valve 12 are communicated with source of the gas dyad 11 respectively, pneumatic frequency modulation loop comprises two two five-way valves 13 again, 16, four air-capacitors and a frequency adjustment valve 15, wherein control air-capacitors 14 and two two five-way valves 13 for two, 16 constitute alternation square wave pulse circuit, be responsible for externally output pulse control signal, regulating air-capacitor 17 for two is connected on two five-way valves 16 and two return passages of controlling between the air-capacitor 14, regulate the gas capacity size that air-capacitor 17 is used to regulate two control air-capacitors 14 for two, control the speed of two control air-capacitors, 14 inflations.Frequency adjustment valve 15 connects on the regulating loop of two five-way valves 16, and the gas flow on the regulating loop is flow through in 15 restrictions of frequency adjustment valve, and control obtains the frequency of pulse control signal.Two two five- way valves 13,16 connect direction toward complex transformation under the effect of two control air-capacitors 14, make the airflow direction pests occurrence rule conversion of flowing out two five-way valves 13, promptly form the corresponding control operation of Pneumatic valve 12 generations that pulse control signal control is attached thereto, finally make the gas formation pulse signal that source of the gas dyad 11 flows through Pneumatic valve 12 output in the pulse pressure water output system water filling work of control impuls press water output system.Certainly, can not establish as required yet and regulate air-capacitor 17, only the control that realizes two two five- way valves 13,16 by two control air-capacitors 14.
The pulse pressure water output system is connected between high service system and the pneumatic frequency modulation control system, and the pulse pressure water output system is accepted the control of pneumatic frequency modulation control system and high pressure water injection is outpoured by delivery port 8 pulsation.The pulse pressure water output system comprises reversal valve 6, with reversal valve 6 parallel connections and current controlling party to the reverse reversal valve 7 opposite with reversal valve 6, high-pressure overflow valve 4, low pressure relief valve 5 and be connected reversal valve 6 and reverse two delivery ports 8 on the reversal valve 7, reversal valve 6 and oppositely reversal valve 7 be connected on the connecting line between two delivery ports 8 and the high-pressure plunger water pump 3, reversal valve 6 and oppositely in the reversal valve 7 controlling party of current on the contrary, promptly two delivery ports 8 are in the state of another water outlet of water inlet all the time, and Pneumatic valve 12 is controlled reversal valve 6 and the oppositely unlatching of reversal valve 7 simultaneously.High-pressure overflow valve 4 is connected high-pressure plunger water pump 3 and provides on the pipeline of water under high pressure for reversal valve 6 and reverse reversal valve 7, and low pressure relief valve 5 is connected on the current loop of reversal valve 6 and reverse reversal valve 7.Certainly, reverse reversal valve in parallel with reversal valve and delivery port also can have many covers, its current flow out direction can be identical with reversal valve also can be opposite, the needs that concrete quantity is used according to reality are decided.
When preventing two delivery port 8 Inlet and outlet waters, coal petrography slag and dust enter in reverse reversal valve 7 and the reversal valve 6, on two delivery ports 8, also be connected with strainer 10 and residual cake valve 9 respectively, the coal petrography slag and the dust that flow in the strainer 10 main interception courses of work, residual cake valve 9 is responsible for tackling the coal petrography slag and the dust discharge line of post precipitation.
In the course of work, when needing toward two boring water fillings simultaneously, high-pressure water drives high-pressure plunger pump 3 by air motor 2 and produces, gas source triplet 1 is responsible for air motor 2 source of the gas is provided, simultaneously, source of the gas dyad 11 begins to provide source of the gas for pneumatic frequency modulation control system, source of the gas dyad 11 sources of the gas can be drawn from source of the gas pipe before the gas source triplet 1 of air motor 2, two control air-capacitors 14 and two two five-way valves 13 in pneumatic frequency modulation control system, the 16 alternation square wave pulse circuits that constitute can constantly produce pulse control signal, and the Pneumatic valve 12 that control is attached thereto produces corresponding pulsation control operation.When source of the gas dyad 11 gases flow through Pneumatic valve 12, will under the effect of Pneumatic valve 12 continuous conversion air flow stream outgoing directions, form new pulse signal output, control reversal valve 6 and reverse reversal valve 7 carry out the conversion that current flow out direction simultaneously.As when the water under high pressure of reversal valve 6 output during with the water injecting drilling connection, hydraulic pressure is in high pressure conditions in the water injecting drilling on the work plane, water under high pressure constantly pours in the boring, simultaneously, oppositely water stream channels just are communicated with low pressure relief valve 5 in the reversal valve 7, and the hydraulic pressure in the work plane water injecting drilling relative with reverse reversal valve 7 then is in low-pressure state.And when pulse signal is controlled reversal valve 6 and oppositely reversal valve 7 commutates simultaneously, hydraulic pressure in originally relative with the reversal valve 6 work plane water injecting drilling then can be in low-pressure state, and the hydraulic pressure in the work plane water injecting drilling relative with reverse reversal valve 7 then has been in high pressure conditions.Switch so repeatedly, just can produce pulse in two work plane borings, improved the penetration of high pressure water injection.
Regulate air-capacitors 17, two five-way valves 16 and a frequency adjustment valve 15 by two and constitute regulating loop, the adjustable range of one-sided output can be at 15-120 time/min, adjust the quantity or the size of air-capacitor, can also obtain the slower or adjustable range faster of frequency.High-pressure overflow valve 4 and low pressure relief valve 5 all can carry out the pressure adjustment by manual voltage regulation, and during water filling, superpressure part current are let out recovery tank by high-pressure overflow valve 4, and the low-pressure section current also can be let out recovery tank by low pressure relief valve 5.Owing to from the water that boring is flowed back to, contain more coal petrography slag and dust probably, can be and be connected the strainer 10 at delivery port 8 places effectively with its interception, protection reversal valve 6, oppositely reversal valve 7 and low pressure relief valve 5 are not blocked stuck or cross quick-wearing.When work plane boring is in high pressure conditions again, coal petrography slag and dust can be swept away again by High-Pressure Water, in heavy in section strainer 10, water flow velocity is very slow, coal petrography slag and dust will be deposited to strainer 10 bottoms again, regularly remove by residual cake valve 9, guaranteed smooth, the safe handling of coal seam pulsed infusion device.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (5)
1. the device of high-pressure pulsating water filling control coal rock dynamic disaster, comprise high service system, pulse pressure water output system and pneumatic frequency modulation control system, described pulse pressure water output system is connected with pneumatic frequency modulation control system with high service system respectively, the control that the pulse pressure water output system is accepted pneumatic frequency modulation control system is injected into the water under high pressure pulsation that high service system provides in the boring, in mine coal seam, inject the pulsation water under high pressure by boring, described pulsation water under high pressure is meant the water that has certain pressure and pressure cycle variation, it is characterized in that, described pneumatic frequency modulation control system comprises pneumatic frequency modulation loop and the Pneumatic valve that is used with pneumatic frequency modulation loop, described pneumatic frequency modulation loop and Pneumatic valve are communicated with external source of the gas respectively, pulse control is responsible for producing in pneumatic frequency modulation loop, and Pneumatic valve is converted to pulse control signal with external source of the gas and outputs to the pulse pressure water output system.
2. the device of high-pressure pulsating water filling control coal rock dynamic disaster according to claim 1, it is characterized in that, described pneumatic frequency modulation loop comprises two two five-way valves, two control air-capacitors and a frequency adjustment valve, and described two control air-capacitors and two two five-way valves constitute alternation square wave pulse circuit; Described frequency adjustment valve is connected on the regulating loop of two five-way valves, and the gas flow on the regulating loop is flow through in the restriction of frequency adjustment valve.
3. the device of high-pressure pulsating water filling control coal rock dynamic disaster according to claim 2, it is characterized in that, comprise that also two are regulated air-capacitor, described adjusting air-capacitor is connected on the return passage between two five-way valves and two the control air-capacitor, regulates the gas capacities that air-capacitors are regulated two control air-capacitors respectively for two.
4. the device of high-pressure pulsating water filling control coal rock dynamic disaster according to claim 1, it is characterized in that, described pulse pressure water output system comprises reversal valve, delivery port, high-pressure overflow valve, low pressure relief valve, strainer and residual cake valve, described reversal valve is connected on the connecting line between delivery port and the high service system, and reversal valve is accepted the control of Pneumatic valve; Described high-pressure overflow valve is connected between high service system and the reversal valve, and low pressure relief valve is connected on the current loop of reversal valve; Described strainer and residual cake valve are connected between delivery port and the reversal valve.
5. the device of high-pressure pulsating water filling control coal rock dynamic disaster according to claim 4, it is characterized in that, also comprise at least one the cover with the reversal valve parallel connection and with reversal valve current controlling party to opposite reverse reversal valve and delivery port, described reverse reversal valve is accepted the control of Pneumatic valve simultaneously, oppositely reversal valve is connected on the connecting line between high-pressure overflow valve and the reversal valve, and oppositely the current loop of reversal valve is communicated with low pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100834163A CN101539028B (en) | 2009-04-30 | 2009-04-30 | Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100834163A CN101539028B (en) | 2009-04-30 | 2009-04-30 | Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101539028A CN101539028A (en) | 2009-09-23 |
| CN101539028B true CN101539028B (en) | 2011-12-28 |
Family
ID=41122400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100834163A Expired - Fee Related CN101539028B (en) | 2009-04-30 | 2009-04-30 | Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101539028B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102533B (en) * | 2010-12-31 | 2013-07-03 | 中国矿业大学 | Method for forecasting real-time measurement of spatial geometrical information of coal rock dynamic disaster |
| CN102155254B (en) * | 2011-02-28 | 2013-05-22 | 中国矿业大学 | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection |
| CN103758570A (en) * | 2014-01-14 | 2014-04-30 | 中国矿业大学 | Method for controlling high mine pressure of open-air roadway by hydraulic fracturing |
| CN103940568B (en) * | 2014-04-11 | 2016-08-17 | 中国矿业大学 | A kind of method detecting tight roof relieving shot effect |
| CN103899271A (en) * | 2014-04-23 | 2014-07-02 | 中国矿业大学(北京) | Long drill hole pulsed water injection outburst prevention method for coal face of outburst coal seam |
| CN104061013B (en) * | 2014-06-23 | 2016-02-10 | 中国矿业大学 | One utilizes freezing process to improve the infiltrative method of low-permeability coal seam and device |
| CN105673063B (en) * | 2016-01-06 | 2018-01-16 | 中国矿业大学 | A kind of high inclination-angle thick gassy coal seam impacts diaster prevention and control method |
| CN108343440B (en) * | 2018-03-08 | 2019-03-26 | 中南大学 | A kind of heading cavitation flood pattern |
| CN108678747B (en) * | 2018-04-28 | 2019-08-30 | 中国矿业大学 | A kind of method and apparatus of pulsed water fracturing control Top coal caving characteristic |
| CN113107575B (en) * | 2021-04-27 | 2023-04-28 | 太原理工大学 | Coal seam double-cylinder high-pressure pulse fluctuation water injection generating device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1490297A1 (en) * | 1987-05-22 | 1989-06-30 | Филиал Новочеркасского Политехнического Института Им.Серго Орджоникидзе,Г.Шахты | Method of hydraulic perforation of outburst-hazardous seams |
| GB2278379A (en) * | 1993-05-05 | 1994-11-30 | Stanley Ball | A mine pollution control unit |
| DE10008450C1 (en) * | 2000-02-23 | 2001-09-27 | Montan Tech Gmbh | Test drilling to assess the risk of a rock fall at a coal mine uses high pressure water jets to drill into the mine seam with measurements of at least one drilling parameter to be correlated with the level of danger |
| JP2006074939A (en) * | 2004-09-03 | 2006-03-16 | Kandenko Co Ltd | Method for removing filled sand and power cable in subterranean buried trough, method for regenerating trough and for filling hollow portion |
| CN101161992A (en) * | 2006-10-12 | 2008-04-16 | 中国矿业大学(北京) | Ore seam injection method during mining process |
| CN201080830Y (en) * | 2007-10-02 | 2008-07-02 | 重庆市兆巍矿山机电制造有限公司 | Water injection device |
| 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 |
| CN201407065Y (en) * | 2009-04-30 | 2010-02-17 | 聂百胜 | High pressure pulsating water-injecting device for preventing coal or rock dynamic disaster |
-
2009
- 2009-04-30 CN CN2009100834163A patent/CN101539028B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1490297A1 (en) * | 1987-05-22 | 1989-06-30 | Филиал Новочеркасского Политехнического Института Им.Серго Орджоникидзе,Г.Шахты | Method of hydraulic perforation of outburst-hazardous seams |
| GB2278379A (en) * | 1993-05-05 | 1994-11-30 | Stanley Ball | A mine pollution control unit |
| DE10008450C1 (en) * | 2000-02-23 | 2001-09-27 | Montan Tech Gmbh | Test drilling to assess the risk of a rock fall at a coal mine uses high pressure water jets to drill into the mine seam with measurements of at least one drilling parameter to be correlated with the level of danger |
| JP2006074939A (en) * | 2004-09-03 | 2006-03-16 | Kandenko Co Ltd | Method for removing filled sand and power cable in subterranean buried trough, method for regenerating trough and for filling hollow portion |
| CN101161992A (en) * | 2006-10-12 | 2008-04-16 | 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 |
| CN201080830Y (en) * | 2007-10-02 | 2008-07-02 | 重庆市兆巍矿山机电制造有限公司 | Water injection device |
| CN201407065Y (en) * | 2009-04-30 | 2010-02-17 | 聂百胜 | High pressure pulsating water-injecting device for preventing coal or rock dynamic disaster |
Non-Patent Citations (2)
| Title |
|---|
| 张广太.煤矿硫化氢赋存机理及治理研究.《太原理工大学》.2008,第49-56页. * |
| 赵振保.变频脉冲式煤层注水技术研究.《采矿与安全工程学报》.2008,第25卷(第4期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101539028A (en) | 2009-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101539028B (en) | Apparatus for preventing and controlling coal or rock dynamic disaster by high-pressure pulse water injection | |
| US11506041B2 (en) | Drilling-slitting-sealing-fracturing device and method for a deep low-permeability gassy coal seam | |
| CN101575983B (en) | Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. | |
| CN103541710B (en) | Underground coal mine gas-liquid two-phase alternately drives pressure break coal body strengthening gas pumping method mutually | |
| CN105909228B (en) | High voltage pulse hydraulic slotted liner technique-fracturing device and method | |
| CN102155254B (en) | Method for extracting gas in low air permeability coal layer by pulse fracture anti-reflection | |
| CN112761583B (en) | Underground hydraulic lifting in-situ sand prevention and sand removal oil extraction and gas production system and method | |
| CN105422164B (en) | Hydrofracturing is anti-reflection to aid in coal seam efficient water injection method and apparatus | |
| WO2018223421A1 (en) | Pneumatic self-propelled ultrahigh-pressure-pulsed-jet auxiliary impacting rock-breaking equipment | |
| CN102704905A (en) | Segmental hydraulic fracturing coal seam pressure releasing device and method | |
| CN214330681U (en) | Three-blocking two-injection hole packer for coal mine gas extraction drill hole | |
| CN201407065Y (en) | High pressure pulsating water-injecting device for preventing coal or rock dynamic disaster | |
| CN110529112A (en) | Rock mass waterpower is without acoustic bearing crushing device | |
| CN214697785U (en) | Device for solidifying coal bed by utilizing microorganisms in cross-cut coal uncovering process | |
| CN103643899A (en) | Integrated drilling-cutting drill rod device | |
| CN203547562U (en) | Integrated drilling and cutting drill stem | |
| CN103573193B (en) | Integration is bored and is cut boring rod set | |
| CN112343570A (en) | Coal mine porous hydraulic fracturing system and control method | |
| CN108561176B (en) | Automatic blocking and permeability-increasing device and method for gas extraction drilling | |
| CN109113701A (en) | Using air as the anti-reflection technology of pulsating pressure-air creep pressure break and device of medium | |
| CN113250670B (en) | Single-hole multi-section synchronous control fracturing coal body permeability increasing system and method | |
| CN108843371A (en) | It is a kind of based on the coal seam subregion Dynamic Water Injection process for adopting release | |
| CN207017985U (en) | Stope adopts the pre- gas-removing shallow bore hole hydraulic fracturing device of section in advance | |
| CN203412625U (en) | Underground coal mine drainage facility | |
| CN201068805Y (en) | Device for suppressing coal and gas bursting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20170430 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |