LU500529B1 - Movable experimental apparatus for cracking loaded gas-containing coal by using high-voltage pulse - Google Patents
Movable experimental apparatus for cracking loaded gas-containing coal by using high-voltage pulse Download PDFInfo
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- LU500529B1 LU500529B1 LU500529A LU500529A LU500529B1 LU 500529 B1 LU500529 B1 LU 500529B1 LU 500529 A LU500529 A LU 500529A LU 500529 A LU500529 A LU 500529A LU 500529 B1 LU500529 B1 LU 500529B1
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- voltage pulse
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- coal
- cracking
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- 239000003245 coal Substances 0.000 title claims abstract description 98
- 238000005336 cracking Methods 0.000 title claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 40
- 238000005259 measurement Methods 0.000 claims description 6
- 238000011160 research Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 23
- 230000000694 effects Effects 0.000 description 11
- 230000035699 permeability Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Dispersion Chemistry (AREA)
- Food Science & Technology (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Medicinal Chemistry (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to the field of coal mine gas control or coal seam gas extraction, and in particular, to a movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse. The following solution is provided hereby. The experimental apparatus includes a high-voltage pulse generator and a generator box. A voltage monitor and a current monitor are electrically connected to the high-voltage pulse generator. A plurality of pressure application devices are disposed on the generator box. Each of the plurality of pressure application devices is configured to apply a pressure to an experimental coal body placed inside the generator box. The high-voltage pulse generator is connected to the experimental coal body through a coaxial cable. By means of the present invention, experimental researches under environmental conditions that are more consistent with actual environmental conditions of mines can be performed. In addition, the present invention takes into account both a ground stress and a gas pressure, and is of great significance to practical engineering application of high-voltage pulses.
Description
! LU500529 P100707LU00
TECHNICAL FIELD The present invention relates to the field of coal mine gas control or coal seam gas extraction, and in particular, to a movable experimental apparatus for cracking loaded gas- containing coal by using a high-voltage pulse.
BACKGROUND Existing coal seam enhancement technologies often have certain limitations. It is necessary to further study efficient and safe new methods to relieve coal pressure and increase permeability. The high-voltage pulse technology has been proposed in recent years and is a new method for coal mine gas control. The method uses an electro-hydraulic effect to apply a high voltage to a special electrode instantaneously to generate plasma, and uses the law of energy conversion to convert electrical energy into mechanical energy to crack the coal body. À large number of related experiments have been carried out in the laboratory. However, there are few reports on experiments that take into account two influencing factors of a ground stress and a gas pressure. Related studies on coal by using a high-voltage pulse under real conditions need to be further carried out.
In view of the above situation, it is necessary to conduct experimental researches in presence of the ground stress and the gas pressure to lay an important theoretical foundation for practical engineering application. In addition, it is difficult to take cracking measures and detect cracking effects simultaneously under different experimental conditions, and most of the previous experimental apparatuses are inconvenient to move and cannot meet the requirement of needing to move the experimental apparatus. To this end, the present invention provides a movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse.
SUMMARY In order to resolve the problems in the prior art, the present invention provides a movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse. The experimental apparatus adopts the synchronous monitoring of internal strains of experimental coal body and can achieve synchronous measurement of coal body permeability through a special design. By measuring electrical parameters of an experiment for cracking by discharging of the high-voltage pulse, cracking and permeation enhancement effects of the coal body under different pulse energy and pulse power are studied, which has great guiding significance for practical engineering application. The experimental apparatus is designed as an integrated movable trolley, which can satisfy a situation that an experimental site needs to be moved or a special experimental environment needs to be changed.
To achieve the foregoing objective, the present invention adopts the following technical solutions.
A movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse is provided, the experimental apparatus including a high-voltage pulse generator and a generator box, where a voltage monitor and a current monitor are electrically connected to the high-voltage pulse generator, a plurality of pressure application devices are disposed on the generator box, each of the plurality of pressure application devices is configured to apply a pressure to an experimental coal body placed inside the generator box, and the high-voltage pulse generator is connected to the experimental coal body through a coaxial cable.
Further, the experimental apparatus further includes a high-pressure methane cylinder, a flow meter is connected between the high-pressure methane cylinder and the generator box, and a pressure reducing valve is disposed on the high-pressure methane cylinder.
Further, the plurality of pressure application devices are configured to respectively apply pressures in a horizontal direction and pressures in a vertical direction to the experimental coal body inside the generator box.
Further, an elongated end of each of the pressure application devices extends into the generator box, and a first plate is fixedly connected to the elongated end.
Further, the pressure application device includes a hydraulic cylinder, a hydraulic pump is connected to the hydraulic cylinder, and the hydraulic pump controls the hydraulic cylinder through an electromagnetic relief valve.
Further, a dynamic strain gauge is disposed outside the generator box, the dynamic strain gauge is connected to the experimental coal body through a strain data measurement wire, and the dynamic strain gauge is configured to measure strain data of internal characteristic points of the experimental coal body.
Further, the flow meter is configured to measure a content of a gas entering the experimental coal body from the high-pressure methane cylinder, and the pressure reducing valve is configured to adjust a pressure of the gas entering the experimental coal body from the high-pressure methane cylinder.
Further, a trolley is disposed at a bottom of the generator box. The present invention has the following beneficial effects:
1. By means of the present invention, experimental researches under environmental conditions that are more consistent with actual environmental conditions of mines can be performed. In addition, the present invention takes into account both a ground stress and a gas pressure, and is of great significance to practical engineering application of high-voltage pulses.
2. The present invention provides a feasible implementation solution for the simultaneous execution of the experiment process and the experiment effect measurement during the cracking of the coal body by using a high-voltage pulse. It is convenient to analyze relevant data laws while conducting experiments on the experimental system, which saves the labor and material resources for the experiment.
3. By means of the present invention, different rock masses under the effect of the high- voltage pulse are studied, cracking experiments may be conducted through analysis for coal bodies of different properties, and coal bodies of different properties under different conditions are analyzed. The optimal high-voltage pulse energy and the optimal high-voltage pulse power provide further data support and lay an important theoretical foundation for the application of an engineering field for coal mine gas control and coal seam gas extraction.
4. By means of the present invention, specific requirements of changing the experimental environment can be satisfied, the experimental apparatus can be moved at any time to meet the needs of special experiments, basic research work can be carried out under complex and changeable experimental conditions, which can not only meet the basic research of the high- voltage pulse in coal mine safety application, but also expand the application field of the high- voltage pulse to improve its application effect.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an overall structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a generator box according to an embodiment of the present invention. FIG. 3 is a right view of the generator box according to an embodiment of the present invention.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some of the embodiments of the present invention rather than all of the embodiments. Referring to FIG. 1 to FIG. 3, a movable experimental apparatus for cracking loaded gas- containing coal by using a high-voltage pulse is provided. The apparatus includes an experimental coal body 23 and a generator box 3. The experimental coal body 23 is placed in the generator box 3, and a coaxial cable 2 is threaded in a reserved hole on a right side of the generator box 3. A special electrode is mounted at a front end of the coaxial cable 2 to act on the experimental coal body, and an other end of the coaxial cable is connected to a high-voltage pulse generator 1 to provide high-voltage electric energy.
The generator box 3 is configured to apply acting forces in horizontal and vertical directions to the experimental coal body 23 inside the generator box, and the generator box 3 can seal gas.
In some embodiments, the experimental coal body 23 is placed in the generator box 3, the coaxial cable 2 is caused to be in contact with the experimental coal body 23 through the reserved hole on the right side of the generator box 3, and outside of the generator box 3 is connected to the high-voltage pulse generator 1 by the coaxial cable 2. When the coal body 23 is cracked by the high-voltage pulse, the high-voltage pulse generator 1 provides energy to the coal body.
By applying acting forces in horizontal and vertical directions to the experimental coal body 23, a ground stress that the coal body bears in an actual stratum can be simulated. The generator box 3 can seal the gas, and after the generator box is filled with gas, the pressure of a gas contained in the coal seam can be simulated.
In some embodiments, the generator box 3 applies acting forces in horizontal and vertical directions to the inner experimental coal body 23 inside the generator box. Pressure application devices may be mounted on the generator box 3, and the mounting position may be, for example, left and right sides and a top side of the generator box 3. An elongated end of each of the pressure application devices extends into the generator box 3, a first plate 22 is fixedly connected to the elongated end, and a material of the first plate 22 may be a high-strength steel plate.
The pressure application device may be a telescopic device such as a hydraulic cylinder, an electric push rod, or an air cylinder that can generate thrust. Specific objects selected for the pressure application device on each side of the generator box 3 may be the same or different.
For example, three special hydraulic cylinders may be mounted on the left and right sides and an upper side of the generator box 3. According to the selected hydraulic cylinder, the
> LU500529 hydraulic cylinder is pushed by using a hydraulic pump 10 via a high-pressure oil pipe 9 to generate strong acting forces in two directions. The magnitude of values of the acting forces in the horizontal and vertical directions of the hydraulic cylinder is adjusted by using an electromagnetic relief valve 11 on the hydraulic pump 10, so as to achieve the purpose of simulating a binding force of the ground stress.
The vertical force is applied to the experimental coal body 23 by using a first hydraulic cylinder 4, and the horizontal force is applied to the experimental coal body 23 by using two second hydraulic cylinders 5 in the left and right horizontal directions, so as to simulate ground stress conditions in actual engineering. The acting forces in the two directions may be the same or different, and the values of the acting forces in the vertical and horizontal directions are precisely controlled by using the electromagnetic relief valve 11.
A high-pressure methane cylinder 15 is disposed outside the generator box 3, and the high- pressure methane cylinder 15 fills gas into the experimental coal body 23 through a gas filling pipeline 24.
In order to measure the content of a gas flowing into the generator box 3, in some embodiments, an inlet flow meter 17 may be mounted on a gas pipeline 24 to measure methane content at an inlet of the experimental coal body 23. An outlet flow meter 18 may be mounted at a methane outlet of the generator box 3 to measure the methane content at an outlet of the experimental coal body 23. Then permeability data of the experimental coal body 23 can be measured according to size characteristics of the experimental coal body 23 by using difference between the inlet flow meter 17 and the outlet flow meter 18. In the experiment of applying the high-voltage pulse to the coal body, the experimental conditions can be changed according to different experimental purposes, to study permeability changes of the experimental coal body 23 before and after the application of the high-voltage pulse, which can intuitively reflect the law of influence of different factors on coal body cracking and seepage enhancement.
A pressure reducing valve 16 is mounted on the high-pressure methane cylinder 15. A gas pressure is simulated to pass through the high-pressure methane cylinder 15, the required gas pressure is adjusted through the pressure reducing valve 16, and the pressure is injected into the generator box 3 through the reserved hole on the right side of the generator box 3. High- strength silicone pads are provided at mounting positions of steel plates of the generator box 3, and the steel plates and the high-strength silicone pads are compacted and tightened by using screws to ensure gas sealing.
Gas-containing conditions of the experimental coal body 23 are provided by the high-
pressure methane cylinder 15 through the reserved holes on the generator box 3, and the methane injection pressure can be adjusted randomly by using the pressure reducing valve 16, so as to study the relevant influence law of factors such as different gas pressures and gas content on the experimental results during the experiment.
A voltage monitor 20 and a current monitor 21 are electrically connected to the high- voltage pulse generator 1. In some embodiments, the voltage monitor 20 may be a high-voltage probe voltage monitor, and the current monitor 21 may be a Rogowski coil current monitor.
During the experiment process of the coal body 23, the high-voltage pulse generator 1 uses the voltage monitor 20 and the current monitor 21 to monitor and collect discharge voltages and discharge currents in the process of cracking the coal body, and the pulse energy and the pulse power may be further calculated, so that different cracking effects of the pulse energy and pulse power on the experimental coal body 23 can be studied under different experimental conditions, so as to obtain the optimal pulse energy and pulse power for different coal bodies under different engineering backgrounds, which provides an important data and theoretical basis for engineering practice.
The strain data of some characteristic points in the experimental coal body 23 is monitored by arranging dynamic strain gauges inside the experimental coal body 23. Connecting wires of the dynamic strain gauges are led out from the reserved hole on the right side of the generator box 3, and are connected to a dynamic strain gauge 19. During the experiment, the dynamic strain gauge 19 detects the dynamic strain data of the characteristic points in the coal body to further analyze the effect of the high-voltage pulse on the coal body.
The analysis of the energy and power during application to the coal body by the high- voltage pulse generator 1 is to measure relevant electrical parameters by using the high-voltage probe voltage detector and the Rogowski coil current detector on the high-voltage pulse generator 1. The pulse energy and pulse power during the experiment are calculated by using the electrical parameters, which is convenient for analyzing the optimal pulse energy and pulse power characteristics under different experimental conditions.
A data measurement lead wire 25 for measuring the strain of the characteristic points in the experimental coal body 23 is led out through the reserved holes on the generator box 3, and the data measurement lead wire 25 is connected to the dynamic strain gauge 19 to monitor internal dynamic strain values of the experimental coal body 23 during the experiment, so as to achieve the simultaneous implementation of the high-voltage pulse acting on the coal body and monitoring the cracking effect of the coal body.
A trolley 12 is disposed at a bottom of the generator box 3, and the trolley 12 brings the generator box 3 and the hydraulic pump 10 together, so that the scattered experimental structure becomes a whole. High-strength wheels 14 are mounted below a structure of the trolley 12, and a hand-pushing crossbar 13 of the trolley 12 is mounted on a left side of the structure of the trolley 12, so as to achieve the convenient movement of the experimental apparatus, and meet the special condition of the need to move the experimental apparatus.
The operating principle is that, during the experiment of high-voltage pulse cracking the coal body, the high-voltage pulse generator 1 provides high-voltage electric energy. The coaxial cable 2 is threaded in the generator box 3 to be connected to the experimental coal body 23. First, an experiment of not applying restraint forces in the vertical and horizontal directions is conducted, and then the restraint forces in the two directions are changed by using a first hydraulic cylinder 4 in the vertical direction and a second hydraulic cylinder 5 in the horizontal direction to simulate the experiment condition that ground stresses in the two directions exist, so as to compare different experimental results in presence of the ground stress and not in presence of the ground stress.
Then, the gas pressure charged into the experimental coal body 23 can be adjusted by the pressure reducing valve 16 through the high-pressure methane cylinder 15, and the different results of the gas pressure factor on the cracking experimental coal body 23 can be compared and analyzed to implement the experimental research of cracking the gas-containing coal body by using a high-voltage pulse.
In the above experiments, for different experimental conditions and different experimental purposes, the discharge voltage and the discharge current of cracking the experimental coal body 23 are simultaneously monitored and collected by using the voltage monitor 20 and the current monitor 21, the internal strain values of the experimental coal body 23 during the experiment are simultaneously monitored by using the dynamic strain gauge 19, and permeability data of the experimental coal body 23 before and after each experiment is measured by using the gas inlet flow meter 17 and the outlet flow meter 18, so as to analyze the effect of the high-voltage pulse on the permeability enhancement of the experimental coal body 23 under different experimental conditions.
In the above experiment, if it is necessary to change the experimental site conditions, it can be easily achieved by moving the trolley 12.
The present invention can provide the restraining forces simulating ground stresses in both horizontal and vertical directions. A test box is a sealed space and can be filled with gas to simulate the actual mine coal seam containing gas. In addition, during the experiment for the high-voltage pulse, the effect of permeability enhancement of the coal body can also be detected. Regular properties of the high-voltage pulse cracking the coal body are studied under different experimental conditions, which provides strong data support and theoretical basis for engineering practice. In addition, the experimental apparatus 1s easy to move and can meet the special requirement of changing the experimental environment.
In the description of the present invention, it should be understood that, orientations or position relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are orientations or position relationship shown based on the accompanying drawings, and are merely used for describing the present invention and simplifying the description, rather than indicating or implying that the apparatus or element should have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be construed as a limitation on the present invention.
In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
The above descriptions are only exemplary specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent replacement or modifications made by those skilled in the art within the technical scope of the present invention according to the technical solution and the inventive concept of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. A movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse, the experimental apparatus comprising a high-voltage pulse generator (1) and a generator box (3), wherein a voltage monitor (20) and a current monitor (21) are electrically connected to the high-voltage pulse generator (1), a plurality of pressure application devices are disposed on the generator box (3), each of the plurality of pressure application devices is configured to apply a pressure to an experimental coal body (23) placed inside the generator box (3), and the high-voltage pulse generator (1) is connected to the experimental coal body (23) through a coaxial cable (2).
2. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 1, wherein the experimental apparatus further comprises a high-pressure methane cylinder (15), a flow meter (17) is connected between the high-pressure methane cylinder (15) and the generator box (3), and a pressure reducing valve (16) is disposed on the high-pressure methane cylinder (15).
3. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 1, wherein the plurality of pressure application devices are configured to respectively apply pressures in a horizontal direction and pressures in a vertical direction to the experimental coal body (23) inside the generator box (3).
4. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 3, wherein an elongated end of each of the pressure application devices extends into the generator box (3), and a first plate (22) is fixedly connected to the elongated end.
5. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 4, wherein the pressure application device comprises a hydraulic cylinder, a hydraulic pump (10) is connected to the hydraulic cylinder, and the hydraulic pump (10) controls the hydraulic cylinder through an electromagnetic relief valve (11).
6. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 1, wherein a dynamic strain gauge (19) is disposed outside the generator box (3), the dynamic strain gauge (19) is connected to the experimental coal body (23) through a strain data measurement wire (25), and the dynamic strain gauge (19) is configured to measure strain data of internal characteristic points of the experimental coal body (23).
7. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to claim 2, wherein the flow meter (17) is configured to measure a content of a gas entering the experimental coal body (23) from the high-pressure methane cylinder (15), and the pressure reducing valve (16) is configured to adjust a pressure of the gas entering the experimental coal body (23) from the high-pressure methane cylinder (15).
8. The movable experimental apparatus for cracking loaded gas-containing coal by using a high-voltage pulse according to any of claims 1 to 7, wherein a trolley (12) is disposed at a bottom of the generator box (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110711934.6A CN113447633A (en) | 2021-06-25 | 2021-06-25 | Movable experimental device for high-voltage electric pulse induced cracking loaded coal containing gas |
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| LU500529B1 true LU500529B1 (en) | 2022-02-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11630049B1 (en) * | 2022-11-18 | 2023-04-18 | Chongqing University | Test piece holder for coalbed fracturing |
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| CN114062142B (en) * | 2021-11-30 | 2022-08-19 | 重庆大学 | High-voltage electric pulse in-situ permeability-increasing gas-bearing reservoir two-phase seepage test method |
| CN114062141B (en) * | 2021-11-30 | 2022-08-26 | 重庆大学 | High-voltage electric pulse in-situ fracturing coal seam crack real-time nondestructive observation device |
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| CN104061014B (en) * | 2014-07-07 | 2016-03-02 | 太原理工大学 | A kind of coal seam anti-reflection experimental device based on high electric field pulse |
| CN104614497B (en) * | 2015-03-09 | 2016-04-20 | 中国矿业大学 | True triaxial stream pressure fracturing, slot, seepage flow, gas drive integrated experimental system |
| CN205374434U (en) * | 2016-01-22 | 2016-07-06 | 江西航天经纬化工有限公司 | Compound solid propellant high -voltage testing device |
| CN106761641B (en) * | 2016-12-06 | 2020-01-03 | 中国矿业大学 | Coal body electric pulse fracturing and permeability increasing experimental system and method |
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| CN107462472B (en) * | 2017-07-26 | 2019-12-31 | 太原理工大学 | Experimental simulation device and simulation method for temperature-pressure pulse composite fracturing coal body |
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| CN108387703A (en) * | 2018-01-25 | 2018-08-10 | 西安科技大学 | A kind of coal and gas prominent integrated experiment device |
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| CN109374496B (en) * | 2018-10-23 | 2020-04-24 | 中国石油大学(北京) | Experimental device for be used for injecting alloy into rock core sample |
| CN109323973B (en) * | 2018-12-18 | 2022-04-08 | 重庆大学 | Experimental device for high power pulse wave induced cracking contains gas coal body |
| CN109374510A (en) * | 2018-12-18 | 2019-02-22 | 重庆大学 | A kind of servo seepage apparatus of high power pulse wave fracturing coal seam with gas |
| CN210679175U (en) * | 2019-08-09 | 2020-06-05 | 北京市政建设集团有限责任公司 | Laboratory is with agitating unit of preparation specific moisture content and material ratio soil sample |
| CN212458856U (en) * | 2020-07-17 | 2021-02-02 | 苏州联正测试技术服务有限公司 | Explosion test equipment for laboratory |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11630049B1 (en) * | 2022-11-18 | 2023-04-18 | Chongqing University | Test piece holder for coalbed fracturing |
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Effective date: 20220211 |