CN113686749A - High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method - Google Patents
High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method Download PDFInfo
- Publication number
- CN113686749A CN113686749A CN202110921081.9A CN202110921081A CN113686749A CN 113686749 A CN113686749 A CN 113686749A CN 202110921081 A CN202110921081 A CN 202110921081A CN 113686749 A CN113686749 A CN 113686749A
- Authority
- CN
- China
- Prior art keywords
- gas
- nozzle
- coal rock
- pressure
- connecting pipe
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 155
- 239000011435 rock Substances 0.000 title claims abstract description 139
- 238000004080 punching Methods 0.000 title claims abstract description 56
- 230000035699 permeability Effects 0.000 title claims abstract description 28
- 230000001965 increasing effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005336 cracking Methods 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims description 115
- 238000002474 experimental method Methods 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000004580 weight loss Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 abstract description 27
- 230000007246 mechanism Effects 0.000 abstract description 13
- 238000011160 research Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 238
- 230000000694 effects Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of gas exploitation, in particular to a high-pressure gas jet flow coal rock breaking, cracking and permeability increasing experimental device and a method. The high-pressure gas jet punching coal rock breaking fracturing permeability-increasing experimental device can realize the research on the action mechanism of the high-pressure gas jet punching coal rock breaking and the expansion rule of the coal rock fracture under the action of gas jet impact.
Description
Technical Field
The invention relates to the technical field of gas exploitation, in particular to a high-pressure gas jet punching coal rock breaking cracking permeability-increasing experimental device and method.
Background
For a single low-permeability coal seam, pressure relief, permeability increase and outburst elimination treatment must be carried out on the coal seam in order to effectively improve the gas extraction rate. In the related technology, in addition to the adoption of a drilling pressure relief measure, a hydraulic measure and a deep hole presplitting blasting measure, a novel method for preventing the coal rock from being cracked and increasing the permeability by punching with high-pressure gas jet is also provided, and the defects that the gas analysis is inhibited by water sealing and the permeability of the coal bed is reduced in the hydraulic technology can be effectively avoided to a certain extent. However, the high-pressure gas jet punching coal rock cracking permeability-increasing technology is still in a starting stage, and the action mechanism of the high-pressure gas jet punching coal rock cracking and the expansion rule of the coal rock fracture under the action of gas jet impact are not clear.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, aiming at the problems, the high-pressure gas jet flow punching coal rock cracking permeability-increasing experimental device is provided so as to realize the research on the action mechanism of the high-pressure gas jet flow punching coal rock and the expansion rule of the coal rock fracture under the action of the gas jet flow impact.
The high-pressure gas jet flow punching coal rock breaking cracking permeability increasing experimental device comprises:
the pressure testing machine is used for loading static load on the coal rock test block;
an air compressor having a compressor inlet and a compressor outlet, the compressor inlet communicable with an air source;
a gas cylinder having a gas cylinder inlet and a gas cylinder outlet, the gas cylinder inlet being communicable with the compressor outlet; and
the Laval nozzle is provided with a nozzle inlet and a nozzle outlet, the nozzle inlet can be communicated with the gas storage cylinder outlet, and the Laval nozzle is used for being matched with the compression testing machine so that the nozzle outlet faces to the testing surface of the coal rock test block.
According to the high-pressure gas jet punching coal rock breaking fracturing permeability-increasing experimental device provided by the embodiment of the invention, the research on the action mechanism of the high-pressure gas jet punching coal rock breaking and the expansion rule of the coal rock fracture under the action of gas jet impact can be realized.
In some embodiments, the high-pressure gas jet hole-breaking coal rock fracturing permeability-increasing experimental device further comprises a position adjusting device, and the laval nozzle is arranged on the position adjusting device so as to adjust the distance between the nozzle outlet and the test surface of the coal rock test block through the position adjusting device.
In some embodiments, the high-pressure gas jet punching coal rock breaking cracking permeability increasing experimental device further comprises a nozzle connecting pipe, the nozzle connecting pipe has a first end and a second end opposite to each other in the extending direction of the nozzle connecting pipe, the first end of the nozzle connecting pipe is connected with the outlet of the gas storage cylinder, the second end of the nozzle connecting pipe is connected with the inlet of the nozzle, the nozzle connecting pipe has a rigid pipe section, and the rigid pipe section is arranged on the position adjusting device.
In some embodiments, the laval nozzle is removably coupled to the nozzle connecting tube.
In some embodiments, the gas cylinder is provided in plurality, the compressor outlet is connected to the gas cylinder inlet of each of the plurality of gas cylinders, the first end of the nozzle connection pipe is connected to the gas cylinder outlet of each of the plurality of gas cylinders, and the gas cylinder further includes a pressure regulating valve and a first pressure gauge, each of the pressure regulating valve and the first pressure gauge being provided on the nozzle connection pipe, the first pressure gauge being provided adjacent to the first end of the nozzle connection pipe with respect to the pressure regulating valve in an extending direction of the nozzle connection pipe.
In some embodiments, the high-pressure gas jet coal rock breaking and cracking permeability increasing experimental device further comprises a control valve, the control valve is arranged on the nozzle connecting pipe, and the control valve is arranged adjacent to the second end of the nozzle connecting pipe relative to the first pressure gauge in the extending direction of the nozzle connecting pipe.
In some embodiments, the high-pressure gas jet punching coal rock cracking permeability increasing experimental device further comprises a gas cylinder connecting pipe and a second pressure gauge, wherein the gas cylinder connecting pipe is provided with a first end and a second end which are opposite to each other in the extending direction of the gas cylinder connecting pipe, the first end of the gas cylinder connecting pipe is connected with the outlet of the compressor, the second end of the gas cylinder connecting pipe is connected with the inlet of the gas cylinder, and the second pressure gauge is arranged on the gas cylinder connecting pipe.
The method for performing the high-pressure gas jet punching coal rock breaking fracturing permeability-increasing experiment by using the high-pressure gas jet punching coal rock breaking permeability-increasing experiment device provided by the embodiment of the invention comprises the following steps of:
loading a static load on a coal rock test block by using a pressure tester so as to simulate the underground working condition of the coal rock test block;
pressurizing gas from a gas source by using an air compressor so as to obtain high-pressure gas;
storing the high-pressure gas by using a gas storage cylinder;
and accelerating the high-pressure gas by using a Laval nozzle so that the high-pressure gas is sprayed to the test surface of the coal rock test block at a set flow rate.
According to the method provided by the embodiment of the invention, the action mechanism of the high-pressure gas jet punching coal rock breaking and the expansion rule of the coal rock fracture under the action of the gas jet impact can be researched.
In some embodiments, the distance between the nozzle outlet and the test surface of the coal rock test block is adjusted by adjusting the position of the laval nozzle.
In some embodiments, the weight of the coal rock test block before being subjected to the high pressure gas injection and the weight of the coal rock test block after being subjected to the high pressure gas injection are weighed to obtain the weight loss of the coal rock test block after being subjected to the high pressure gas injection.
Drawings
Fig. 1 is a schematic plan view of a high-pressure gas jet punching coal rock cracking permeability increasing experimental device according to an embodiment of the invention.
Fig. 2 is a schematic view of the position adjustment apparatus of fig. 1.
Fig. 3 is a schematic view of the lafal nozzle of fig. 1.
Reference numerals: a high-pressure gas jet punching coal rock breaking and cracking permeability increasing experimental device 100; an air compressor 1; a compressor outlet 11; a second pressure gauge 2; a gas cylinder connecting pipe 3; an inlet branch pipe 41; an outlet branch pipe 42; an inlet valve 51; an outlet valve 52; a first gas cylinder 61; a second gas cylinder 62; a third gas cylinder 63; a gas cylinder inlet 71; a gas cylinder outlet 72; a nozzle connecting pipe 8; a rigid tube section 81; a first pressure gauge 91; a pressure regulating valve 92; a control valve 93; a pressure tester 10; a loading chamber 101; a coal rock test block 102; a test surface 1021; a Laval nozzle 12; a nozzle inlet 121; a nozzle outlet 122; a position adjusting device 13; a support frame 130.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 3, the high-pressure gas jet hole-punching coal rock-breaking cracking permeability-increasing experimental device 100 according to the embodiment of the invention comprises a pressure tester 10, an air compressor 1, a gas storage cylinder and a laval nozzle 12.
The pressure tester 10 is used to load the coal rock test block 102 with a static load. The air compressor 1 has a compressor inlet and a compressor outlet 11, the compressor inlet being capable of communicating with a source of air. The gas cylinder has a cylinder inlet 71 and a cylinder outlet 72, the cylinder inlet 71 being capable of communicating with the compressor outlet 11. The laval nozzle 12 has a nozzle inlet 121 and a nozzle outlet 122, the nozzle inlet 121 being capable of communicating with the cylinder outlet 72, the laval nozzle 12 being adapted to cooperate with the compression tester 10 such that the nozzle outlet 122 faces a test surface 1021 of the coal block 102.
The loading of the coal rock test block 102 with a static load using the pressure tester 10 may simulate the downhole condition of the coal rock test block 102, such as the stress state of the coal rock test block 102 downhole.
The compressor inlet being capable of communicating with a gas source means: when high-pressure gas is required to be prepared by using the air compressor 1, the inlet of the compressor is communicated with a gas source, and the gas from the gas source is pressurized by using the air compressor 1 to obtain the high-pressure gas; the compressor inlet and the gas source may or may not be connected when the air compressor 1 is not required to produce high pressure gas.
The gas cylinder inlet 71 being able to communicate with the compressor outlet 11 means: when high-pressure gas needs to be filled into the gas cylinder, the gas cylinder inlet 71 is communicated with the compressor outlet 11 so as to conveniently fill the high-pressure gas prepared by the air compressor 1 into the gas cylinder; when it is not necessary to charge the gas cylinder with high-pressure gas, the gas cylinder inlet 71 and the compressor outlet 11 may or may not be communicated.
The nozzle inlet 121 being able to communicate with the cylinder outlet 72 means: when high-pressure gas needs to be sprayed to the test surface 1021 of the coal rock test block 102, the nozzle inlet 121 is communicated with the gas storage cylinder outlet 72, so that the high-pressure gas in the gas storage cylinder enters the Laval nozzle 12 through the nozzle inlet 121 and is sprayed out from the nozzle outlet 122 and then is sprayed to the test surface 1021 of the coal rock test block 102; the nozzle inlet 121 and the cylinder outlet 72 may or may not be in communication when there is no need to inject high pressure gas against the test surface 1021 of the coal rock test block 102.
When the high-pressure gas jet flow punching coal rock breaking cracking permeability-increasing experiment device 100 is used for performing a high-pressure gas jet flow punching coal rock breaking cracking permeability-increasing experiment, a static load is loaded on a coal rock test block 102 by using a pressure tester 10, and the underground working condition of the coal rock test block 102 is simulated. The gas from the gas source is pressurized by the air compressor 1 to obtain high-pressure gas. The high-pressure gas pressurized by the air compressor 1 is stored by the gas bomb. The high pressure gas is accelerated by the laval nozzle 12 to be injected at a set flow rate against the test surface 1021 of the coal test block 102.
After the experiment is finished, the effect of the high-pressure gas jet flow punching coal rock breaking can be quantitatively analyzed by measuring result parameters such as the punching diameter and the punching depth of the coal rock test block 102, the weight loss of the coal rock test block 102 after being sprayed by the high-pressure gas and the like. Different static loads can be loaded on the coal rock test block 102 through the pressure tester 10, so that different underground working conditions of the coal rock test block 102 are simulated; different result parameters can be obtained by changing experiment parameters such as the gas pressure and the gas flow rate of the nozzle outlet 122 of the Laval nozzle 12, the distance between the nozzle outlet 122 and the test surface 1021 of the coal rock test block 102 and the like, and the action mechanism of high-pressure gas jet punching to break coal rock and the expansion rule of coal rock cracks under the impact action of gas jet are further analyzed and obtained, so that the field requirement is guided, and the gas extraction is better served.
Therefore, the research on the action mechanism of the high-pressure gas jet punching coal rock breaking and the expansion rule of the coal rock fracture under the action of the gas jet impact can be realized by using the high-pressure gas jet punching coal rock breaking and cracking permeability increasing experimental device 100 according to the embodiment of the invention.
The high-pressure gas jet punching coal rock breaking and cracking permeability increasing experimental device 100 according to the embodiment of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the high-pressure gas jet hole-punching coal rock-breaking cracking permeability-increasing experimental device 100 according to the embodiment of the invention comprises a pressure tester 10, an air compressor 1, a gas storage cylinder and a laval nozzle 12.
The pressure tester 10 is used to load the coal rock test block 102 with a static load. The air compressor 1 has a compressor inlet and a compressor outlet 11, the compressor inlet being capable of communicating with a source of air. The gas cylinder has a cylinder inlet 71 and a cylinder outlet 72, the cylinder inlet 71 being capable of communicating with the compressor outlet 11. The laval nozzle 12 has a nozzle inlet 121 and a nozzle outlet 122, the nozzle inlet 121 being capable of communicating with the cylinder outlet 72, the laval nozzle 12 being adapted to cooperate with the pressure tester 10 such that the nozzle outlet 122 projects high pressure gas towards the test surface 1021 of the coal block 102.
For example, as shown in fig. 1, the pressure tester 10 is provided with five loading walls, namely a rear loading wall, a left loading wall, a right loading wall, an upper loading wall and a lower loading wall, and the five loading walls enclose a loading cavity 101 with an open front end. For example, the five loading walls are all squares with the side length of 300mm, the loading cavity 101 defined by the five loading walls is a cube with the side length of 300mm, and the cube with the side length of 300mm can be selected as the coal rock test block 102. The Laval nozzle 12 is arranged at the front end opening of the loading cavity 101, and the front surface of the coal rock test block 102 is the test surface 1021.
Before the experiment is started, the coal rock test block 102 is placed in the loading cavity 101, the rear surface, the left surface, the right surface, the upper surface and the lower surface of the coal rock test block 102 are respectively in contact with the rear loading wall, the left loading wall, the right loading wall, the upper loading wall and the lower loading wall of the loading cavity 101, and the front surface of the coal rock test block 102 is exposed outside. The corresponding surface of the coal rock test block 102 can be loaded with a set static load along the X-axis (left-right direction), the Y-axis (front-back direction), and the Z-axis (up-down direction) by the pressure tester 10. The compression tester 10 is known and will not be described in detail here.
It is understood that the size of the loading chamber 101 is not unique. For example, the loading chamber 101 may be a cube with a side of 100mm, 200mm, or 400mm, or the loading chamber 101 may be a cube.
Preferably, the loading pressure of the pressure tester 10 is in the range of 0-60MPa, and the loading precision is 0.01 MPa.
Before the experiment, a gas source is communicated with a compressor inlet, a compressor outlet 11 is communicated with a gas storage bottle inlet 71, and the gas from the gas source is compressed into high-pressure gas by the air compressor 1 and stored in the gas storage bottle. After the gas storage cylinder is filled with high-pressure gas, the air compressor 1 is closed, and the gas source is disconnected from the inlet of the compressor and the outlet 11 of the compressor is disconnected from the inlet 71 of the gas storage cylinder.
In the experiment, the outlet of the gas cylinder is communicated with the nozzle inlet 121 of the laval nozzle 12, and at the same time, the high-pressure gas flows from the gas cylinder to the laval nozzle 12, flows out from the nozzle outlet 122 of the laval nozzle 12, and is sprayed on the front surface of the coal rock test block 102, so that the experiment is completed once. During the process of the high-pressure gas passing through the laval nozzle 12, the flow velocity of the high-pressure gas may be accelerated from the subsonic velocity to the supersonic velocity, and the high-pressure gas is finally injected to the front surface of the coal rock test block 102 at the supersonic velocity.
After the experiment is finished, a plurality of experimental results can be obtained by measuring the punching diameter and the punching depth of the coal rock test block 102, the loss quality of the coal rock test block 102 and the like.
It will be appreciated that the gas source may be air or nitrogen, etc.
In some embodiments, the high-pressure gas jet coal rock breaking and permeability increasing experimental apparatus 100 further comprises a position adjusting device 13, and the laval nozzle 12 is disposed on the position adjusting device 13 so as to adjust a distance between the nozzle outlet 122 and the test surface 1021 of the coal rock test block 102 through the position adjusting device 13.
By changing the distance between the nozzle outlet 122 and the test surface 1021 of the coal rock test block 102, the investigation on the jet punching fracturing and permeability increasing effect under different jet parameter combination conditions is conveniently realized, so that the research on the action mechanism of high-pressure gas jet punching for breaking coal rock and the expansion rule of coal rock fractures under the action of gas jet impact is facilitated.
For example, as shown in fig. 2, the position adjusting device 13 is installed opposite to the front opening of the loading chamber 101 of the compression testing machine 10. The position adjusting device 13 comprises a support 130 and a guide rail, the laval nozzle 12 is mounted on the support 130, and the support 130 is slidably disposed on the guide rail. Guide rails are arranged on the X axis (left-right direction), the Y axis (front-back direction) and the Z axis (up-down direction), and the support frame 130 can move to a set position under the action of the guide rails. The distance between the nozzle outlet 122 and the testing surface 1021 of the coal briquette 102 may be adjusted by adjusting the position of the support bracket 130.
It is understood that the support 130 may be fixed at the set position after moving to the set position. The structure for realizing the scheme is various, for example, a lead screw is adopted to control the start and stop by a motor, or a limit block is additionally arranged, and the detailed description is omitted here. Therefore, in the experiment, when the high-pressure gas passes through the laval nozzle 12, the high-pressure gas has a reaction force on the laval nozzle 12, and the support frame 130 can eliminate the influence of the reaction force and prevent the laval nozzle 12 from moving.
Preferably, the distance between the nozzle outlet 122 and the testing surface 1021 of the coal rock test block 102 is 10mm-70 mm.
In some embodiments, the apparatus 100 further comprises a nozzle connection pipe 8, the nozzle connection pipe 8 has a first end and a second end opposite to each other in the extending direction, the first end of the nozzle connection pipe 8 is connected to the gas cylinder outlet 72, the second end of the nozzle connection pipe 8 is connected to the nozzle inlet 121, the nozzle connection pipe 8 has a rigid pipe section 81, and the rigid pipe section 81 is disposed on the position adjustment device 13.
For example, as shown in fig. 1 to 3, the first end of the nozzle connection pipe 8 is the left end of the nozzle connection pipe 8, the second end of the nozzle connection pipe 8 is the right end of the nozzle connection pipe 8, the left end of the nozzle connection pipe 8 is connected to the gas cylinder outlet 72, and the right end of the nozzle connection pipe 8 is connected to the nozzle inlet 121. The nozzle connection tube 8 includes a rubber tube section and a rigid tube section 81, the rigid tube section 81 is provided at the right end of the rubber tube section, the rigid tube section 81 is connected to the nozzle inlet 121, and the rigid tube section 81 is mounted on the position adjusting device 13.
Therefore, the distance between the rigid pipe section 81 and the test surface 1021 of the coal rock test block 102 can be adjusted by adjusting the distance between the rigid pipe section 81 and the test surface 1021 of the coal rock test block 102 through the position adjusting device 13, so that the high-pressure gas jet punching coal rock breaking and permeability increasing experimental device 100 is more convenient to use.
In some embodiments, the laval nozzle 12 is removably connected to the nozzle connecting tube 8.
For example, as shown in fig. 3, the laval nozzle 12 is threadably connected to the rigid pipe section 81 of the nozzle connection pipe 8. The model of the laval nozzle 12 of the high-pressure gas jet punching coal breaking rock cracking permeability-increasing experimental device 100 can be replaced by disassembling and assembling the laval nozzle 12, so that high-pressure gas is sprayed to the test surface 1021 of the coal rock test block 102 at different flow rates, the investigation of the jet punching cracking permeability-increasing effect under the condition of different jet parameter combinations is conveniently realized, and the research on the action mechanism of the high-pressure gas jet punching coal breaking rock and the expansion rule of the coal rock cracks under the action of gas jet impact is facilitated.
Preferably, the laval nozzle 12 is of various specifications from 1Ma to 3.5 Ma.
In some embodiments, the plurality of gas cylinders are provided, the compressor outlet 11 is connected to the cylinder inlet 71 of each of the plurality of gas cylinders, and the first end of the nozzle connection pipe 8 is connected to the cylinder outlet 72 of each of the plurality of gas cylinders. In other words, a plurality of gas cylinders are connected in parallel.
For example, as shown in fig. 1, the plurality of gas cylinders includes a first gas cylinder 61, a second gas cylinder 62, and a third gas cylinder 63, each having a cylinder inlet 71 and a cylinder outlet 72, the cylinder inlet 71 of each gas cylinder being connected to the compressor outlet 11, and the cylinder outlet 72 of each gas cylinder being connected to the nozzle connection pipe. From this, it can store a large amount of gas to open air compressor 1 once to carry out many times of experiments, not only be favorable to improving experimental efficiency, avoid moreover because the air compressor 1 that frequent switch air compressor 1 leads to damages.
Preferably, an inlet valve 51 is provided at the cylinder inlet 71, an outlet valve 52 is provided at the cylinder outlet 72, the communication and disconnection between the compressor outlet 11 and the cylinder inlet 71 of the corresponding cylinder can be controlled by controlling the inlet valve 51, and the communication and disconnection between the nozzle inlet 121 and the cylinder outlet 72 of the corresponding cylinder can be controlled by controlling the outlet valve 52.
From this, on the one hand, when carrying out the experiment, can use a gas bomb or a plurality of gas bomb simultaneously according to actual demand to improve gaseous utilization ratio. On the other hand, after each experiment is finished, the inlet valve 51 and the outlet valve 52 of each gas storage cylinder are closed, so that gas leakage or gas accumulation in a pipeline can be effectively avoided.
Preferably, a pressure gauge is arranged on the gas storage cylinder. From this, can the pressure in every gas bomb of real-time supervision through the manometer of observing on the gas bomb, and then realize the monitoring to the gas capacity of gas bomb. On the one hand, when the gas in a certain gas cylinder is exhausted soon, the outlet valve 52 of the gas cylinder is closed in time, so that the gas in other gas cylinders is prevented from flowing back, and the gas utilization rate in other gas cylinders is influenced. On the other hand, when inflating, when the manometer shows that numerical value is too big, in time close inlet valve 51 or air compressor 1, avoid the gas bomb to take place the explosion because of pressure is too big, be favorable to improving the experiment security.
Preferably, the gas cylinder has a volume of 100L.
The high-pressure gas jet punching coal rock breaking and permeability increasing experimental device 100 further comprises a pressure regulating valve 92 and a first pressure gauge 91, each of the pressure regulating valve 92 and the first pressure gauge 91 is arranged on the nozzle connecting pipe 8, and the first pressure gauge 91 is arranged at the first end, adjacent to the nozzle connecting pipe 8, of the pressure regulating valve 92 in the extending direction of the nozzle connecting pipe 8.
The pressure of the high-pressure gas in the nozzle connecting pipe 8 is monitored by the first pressure gauge 91, and whether the pressure of the high-pressure gas in the nozzle connecting pipe 8 meets the experimental requirements can be confirmed. The high pressure gas pressure at the nozzle inlet 121 may be adjusted to a set pressure using the pressure regulating valve 92. For example, the pressure of the high-pressure gas in the nozzle connection pipe 8 (the pressure at the inlet of the pressure regulating valve 92) is a first set pressure, and the pressure at the nozzle inlet 121 (the pressure at the outlet of the pressure regulating valve 92) required for the experiment is a second set pressure, and the high-pressure gas can be regulated from the first set pressure to the second set pressure by regulating the opening degree of the pressure regulating valve 92.
Therefore, the investigation on the jet flow punching fracturing permeability-increasing effect under the condition of different jet flow parameter combinations is conveniently realized, and the research on the action mechanism of high-pressure gas jet flow punching coal rock breaking and the expansion rule of coal rock fractures under the action of gas jet flow impact is facilitated.
Preferably, the adjustment accuracy of the pressure adjustment valve 92 is 0.1 Mpa.
Preferably, the pressure at the outlet of the pressure regulating valve 92 is 4MPa, 8MPa or 12 MPa.
In some embodiments, the high-pressure gas jet coal rock breaking and cracking permeability increasing experimental apparatus 100 further includes a control valve 93, the control valve 93 is disposed on the nozzle connection pipe 8, and the control valve 93 is disposed adjacent to a second end of the nozzle connection pipe 8 opposite to the first pressure gauge 91 in an extending direction of the nozzle connection pipe 8.
For example, as shown in fig. 1, the pressure regulating valve 92 is provided at the right side of the first pressure gauge 91, the control valve 93 is provided at the right side of the first pressure gauge 91, and the high-pressure gas passes through the pressure regulating valve 92 and the first pressure gauge 91 and reaches the control valve 93, and the nozzle connecting pipe 812 can be controlled to be connected to and disconnected from the nozzle inlet 121 by controlling the control valve 93. Therefore, after impact is completed every time, the control valve 93 can be closed in time, and the nozzle connecting pipe and the nozzle inlet 121 are disconnected, so that high-pressure gas waste can be avoided, and accidental injury of experimenters caused by the sprayed high-pressure gas during replacement of the coal rock test block 102 can be avoided.
In the experiment, the outlet valve 52 of a part of the gas cylinder is opened, and the control valve 93 is closed. The first pressure gauge 91 reads the pressure in the nozzle connecting pipe 8, and when the pressure does not meet the experimental requirements, other gas cylinders are opened, or the experiment is stopped and the gas cylinders are inflated in time. When the pressure in the nozzle connection pipe 8 meets the experimental requirements, the high-pressure gas is adjusted from the first set pressure to the second set pressure by adjusting the opening degree of the pressure adjustment valve 92, and then the control valve 93 is opened, and the high-pressure gas is accelerated by the laval nozzle 12 and is injected to the test surface 1021 of the coal rock test block 102 at a set flow rate.
When the test surface 1021 of the coal rock test block 102 needs to be impacted for multiple times and the amount of high-pressure gas in the gas storage cylinder meets the amount needed by multiple times of impact, the outlet valve 52 of the gas storage cylinder can be opened all the time, the test surface 1021 of the coal rock test block 102 is impacted for multiple times through the cooperation of the first pressure gauge 91, the pressure regulating valve 92 and the control valve 93, the outlet valve 52 of the gas storage cylinder does not need to be frequently opened and closed, the experiment steps are reduced, and the experiment efficiency is favorably improved.
In some embodiments, the high-pressure gas jet coal rock breaking and cracking permeability increasing experimental apparatus 100 further comprises a gas cylinder connecting pipe 3 and a second pressure gauge 2, the gas cylinder connecting pipe 3 has a first end and a second end opposite to each other in the extending direction thereof, the first end of the gas cylinder connecting pipe 3 is connected to the compressor outlet 11, the second end of the gas cylinder connecting pipe 3 is connected to the gas cylinder inlet 71, and the second pressure gauge 2 is disposed on the gas cylinder connecting pipe 3.
For example, as shown in fig. 1, the first end of the cylinder connection pipe 3 is the left end of the cylinder connection pipe 3, and the second end of the cylinder connection pipe 3 is the right end of the cylinder connection pipe 3. The left end of the gas cylinder connecting pipe 3 is connected with the outlet 11 of the compressor, an inlet branch pipe 41 is arranged at the inlet 71 of each gas cylinder, and each inlet branch pipe 41 is communicated with the right end of the gas cylinder connecting pipe 3. The second pressure gauge 2 is arranged between the left end and the right end of the gas storage connecting pipe 3.
From this, utilize second manometer 2 can monitor the pressure in the gas bomb connecting pipe 3. When the second pressure gauge 2 displays that the pressure in the gas storage cylinder connecting pipe 3 reaches the maximum working pressure of the air compressor 1, the air compressor 1 is closed, and the phenomenon that the service life of the air compressor 1 is influenced due to the overload work of the air compressor 1 is avoided.
Preferably, the maximum operating pressure of the air compressor 1 is 30 Mpa.
Preferably, an outlet branch pipe 42 is provided at each cylinder outlet 72, and each outlet branch pipe 42 is connected to the left end of the nozzle connection pipe 8.
The method for performing the high-pressure gas jet punching coal rock breaking fracturing permeability-increasing experiment by using the high-pressure gas jet punching coal rock breaking fracturing permeability-increasing experiment device 100 provided by the embodiment of the invention comprises the following steps of:
loading a static load on the coal rock test block 102 by using the pressure tester 10 so as to simulate the underground working condition of the coal rock test block 102;
pressurizing gas from a gas source by using an air compressor 1 so as to obtain high-pressure gas;
storing high-pressure gas by using a gas storage cylinder;
the high pressure gas is accelerated using the laval nozzle 12 so that the high pressure gas is injected at a set flow rate against the test surface 1021 of the coal block 102.
By utilizing the method provided by the embodiment of the invention, the research on the action mechanism of the high-pressure gas jet punching coal rock breaking and the expansion rule of the coal rock fracture under the impact action of the gas jet can be realized.
In some embodiments, the distance between the nozzle outlet 122 and the testing surface 1021 of the coal rock test block 102 is adjusted by adjusting the position of the laval nozzle 12.
For example, by adjusting the position of the laval nozzle 12 using the position adjusting device 13 shown in fig. 2, the distance between the nozzle outlet 122 and the test surface 1021 of the coal rock test block 102 can be changed.
In some embodiments, the weight of the coal petrography test block 102 before being subjected to the high pressure gas injection and the weight of the coal petrography test block 102 after being subjected to the high pressure gas injection are weighed to obtain the weight loss of the coal petrography test block 102 after being subjected to the high pressure gas injection.
The weight loss of the coal petrography test block 102 can be used as a parameter to analyze the degree of erosion of the coal petrography test block 102.
By taking the high-pressure gas jet flow coal breaking and cracking permeability increasing experiment device 100 shown in fig. 1-3 for a cubic coal and rock test block 102 with a side length of 300mm as an example, the method according to the embodiment of the invention is described in detail:
(1) connecting the equipment components according to the equipment connection flow chart, checking the integrity of each connecting pipe, and ensuring that the equipment components are connected correctly and have good air tightness;
(2) a coal rock test block 102 with the specification of 300mm square is cut by a cutting machine, and the mechanical parameters are measured at the same time. In the embodiment, the loading cavity 101 of the selected compression testing machine 10 is a cube with the side length of 300mm, the prepared coal rock test block 102 is placed in the loading cavity 101, a certain confining pressure is applied to fix the coal rock test block 102 in the loading process, and the confining pressure is loaded to the test set pressure after the position of the coal rock test block 102 is determined;
(3) opening an inlet valve 51 of the gas cylinder, closing an outlet valve 52 of the gas cylinder, and strictly preventing the gas cylinder from colliding and knocking in the gas storage process of the gas cylinder;
(4) the reading of the second pressure gauge 2 is checked, and the start under pressure is strictly forbidden. After the correctness is confirmed, the air compressor 1 is started to realize the pressurization treatment of the gas from the gas source, the pressurized gas is transmitted and stored in the gas storage cylinder through the gas storage cylinder connecting pipe 3, the pressure value of the gas in the gas storage cylinder is observed by reading a pressure gauge on the gas storage cylinder, and the air compressor 1 and the inlet valve 51 are closed after the pressure reaches 30 MPa;
(5) opening an outlet valve 52 of the gas storage cylinder, closing a control valve 93, adjusting the pressure value acting on the nozzle inlet 121 through a pressure adjusting valve 92, and selecting three pressure grades of 4MPa, 8MPa and 12MPa in the experimental process;
(6) laval nozzles 12 with different specifications are additionally arranged according to experimental requirements, the specifications of the Laval nozzles 12 are divided by Mach numbers, and the Laval nozzles 12 with different Mach numbers from 1Ma to 3.5Ma are selected in the experiment. After the Laval nozzle 12 is installed, adjusting the distance between the nozzle outlet 122 of the Laval nozzle 12 and the test surface 1021 of the coal rock test block 102 according to the experiment requirement, wherein the adjustment amplitude is 10mm to 70 mm;
(7) after the pressure at the inlet 121 of the nozzle, the specifications of the Laval nozzle 12 and the distance between the outlet 122 of the nozzle and the test surface 1021 of the coal rock test block 102 are all adjusted, the control valve 93 is opened, after jet punching lasts for 15s, the control valve 93 is closed, the coal rock breaking experiment of primary jet punching is finished, the depth, the diameter and the loss mass of a hole formed by impact are measured, and the coal rock breaking effect of punching is quantitatively analyzed;
(8) by adjusting the pressure at the inlet 121 of the nozzle, the specifications of the Laval nozzle 12 and the distance between the outlet 122 of the nozzle and the test surface 1021 of the coal rock test block 102, a jet flow punching coal rock breaking experiment under different jet flow parameter combination conditions is developed, and the action mechanism of high-pressure gas jet flow punching coal rock breaking and the expansion rule of coal rock cracks under the action of gas jet flow impact are analyzed;
(9) when the jet flow punching experiment needs to be suspended for a long time or the experiment is finished, the air compressor 1 and the gas in the gas storage cylinder are discharged in a pressure relief manner in time, and safety guarantee is provided for the next experiment.
According to the high-pressure gas jet punching coal rock breaking cracking permeability-increasing experimental device 100 and the method, by adjusting the distance (impact target distance) from the Laval nozzle 12 to the coal rock test block 102, adjusting the pressure (jet pressure) of the nozzle inlet 121 of the Laval nozzle 12 and replacing the Laval nozzles 12 (nozzle specifications) of different models, the effect of coal rock breaking cracking permeability-increasing under different jet parameter combination conditions can be inspected, and the action mechanism of high-pressure gas jet punching coal rock breaking and the expansion rule of coal rock cracks under the action of gas jet impact can be further known. The high-pressure gas jet punching coal rock breaking and cracking permeability increasing device 100 has the advantages of strong operability, simplicity and convenience in use, strong stability, safety, reliability, wide applicability and the like.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a high pressure gas jet punches a hole and breaks coal rock fracturing anti-reflection experimental apparatus which characterized in that includes:
the pressure testing machine is used for loading static load on the coal rock test block;
an air compressor having a compressor inlet and a compressor outlet, the compressor inlet communicable with an air source;
a gas cylinder having a gas cylinder inlet and a gas cylinder outlet, the gas cylinder inlet being communicable with the compressor outlet; and
the Laval nozzle is provided with a nozzle inlet and a nozzle outlet, the nozzle inlet can be communicated with the gas storage cylinder outlet, and the Laval nozzle is used for being matched with the compression testing machine so that the nozzle outlet faces to the testing surface of the coal rock test block.
2. The high-pressure gas jet flow coal rock breaking, cracking and permeability increasing experimental device as claimed in claim 1, further comprising a position adjusting device, wherein the laval nozzle is arranged on the position adjusting device so that the distance between the nozzle outlet and the test surface of the coal rock test block can be adjusted through the position adjusting device.
3. The apparatus according to claim 2, further comprising a nozzle connecting pipe having a first end and a second end opposite to each other in the extending direction thereof, wherein the first end of the nozzle connecting pipe is connected to the outlet of the gas cylinder, the second end of the nozzle connecting pipe is connected to the inlet of the nozzle, and the nozzle connecting pipe has a rigid pipe section disposed on the position adjusting device.
4. The high-pressure gas jet flow coal rock breaking, cracking and permeability increasing experimental device as claimed in claim 3, wherein the Laval nozzle is detachably connected with the nozzle connecting pipe.
5. The apparatus as claimed in claim 3 or 4, wherein the gas cylinder is provided in plurality, the compressor outlet is connected to the gas cylinder inlet of each of the plurality of gas cylinders, the first end of the nozzle connecting pipe is connected to the gas cylinder outlet of each of the plurality of gas cylinders, and further comprising a pressure regulating valve and a first pressure gauge, each of the pressure regulating valve and the first pressure gauge is disposed on the nozzle connecting pipe, and the first pressure gauge is disposed adjacent to the first end of the nozzle connecting pipe relative to the pressure regulating valve in the extending direction of the nozzle connecting pipe.
6. The high-pressure gas jet coal rock breaking and cracking permeability increasing experimental device as claimed in claim 5, further comprising a control valve, wherein the control valve is arranged on the nozzle connecting pipe, and the control valve is arranged adjacent to the second end of the nozzle connecting pipe relative to the first pressure gauge in the extending direction of the nozzle connecting pipe.
7. The high-pressure gas jet flow coal rock breaking and cracking permeability increasing experimental device as claimed in any one of claims 1 to 4, further comprising a gas cylinder connecting pipe and a second pressure gauge, wherein the gas cylinder connecting pipe is provided with a first end and a second end which are opposite in the extending direction of the gas cylinder connecting pipe, the first end of the gas cylinder connecting pipe is connected with the outlet of the compressor, the second end of the gas cylinder connecting pipe is connected with the inlet of the gas cylinder, and the second pressure gauge is arranged on the gas cylinder connecting pipe.
8. A method for performing a high-pressure gas jet punching coal rock cracking permeability increasing experiment by using the high-pressure gas jet punching coal rock cracking permeability increasing experiment device as claimed in any one of claims 1-7, comprising the following steps of:
loading a static load on a coal rock test block by using a pressure tester so as to simulate the underground working condition of the coal rock test block;
pressurizing gas from a gas source by using an air compressor so as to obtain high-pressure gas;
storing the high-pressure gas by using a gas storage cylinder;
and accelerating the high-pressure gas by using a Laval nozzle so that the high-pressure gas is sprayed to the test surface of the coal rock test block at a set flow rate.
9. The method of claim 8, wherein the distance between the nozzle outlet and the test surface of the coal rock test block is adjusted by adjusting the position of the laval nozzle.
10. The method of claim 8, wherein the weight of the coal rock test block before being subjected to the high pressure gas injection and the weight of the coal rock test block after being subjected to the high pressure gas injection are weighed to obtain the weight loss of the coal rock test block after being subjected to the high pressure gas injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921081.9A CN113686749A (en) | 2021-08-11 | 2021-08-11 | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921081.9A CN113686749A (en) | 2021-08-11 | 2021-08-11 | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113686749A true CN113686749A (en) | 2021-11-23 |
Family
ID=78579491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110921081.9A Pending CN113686749A (en) | 2021-08-11 | 2021-08-11 | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113686749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116087459B (en) * | 2022-12-23 | 2023-09-19 | 重庆大学 | Liquid carbon dioxide punching fracturing coal seam simulation test system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213077A (en) * | 2011-05-25 | 2011-10-12 | 煤炭科学研究总院沈阳研究院 | Coal seam reaming system using three-dimensional (3D) swirling water jet and reaming and fracturing method for permeability enhancement |
| CN103234891A (en) * | 2013-04-22 | 2013-08-07 | 辽宁工程技术大学 | Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method |
| CN104533513A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | High-pressure abrasive material gas jet coal-breaking pressure relief and permeability improvement equipment and method |
| CN204505027U (en) * | 2015-04-14 | 2015-07-29 | 皖西学院 | A kind of adjustable distance formula sand-blasting machine |
| CN105064971A (en) * | 2015-09-08 | 2015-11-18 | 中国矿业大学 | High-pressure nitrogen blast cracking permeability increase experimental device and method |
| CN107100548A (en) * | 2017-06-20 | 2017-08-29 | 中国石油大学(北京) | Deep ＆ ultra-deep well confined pressure jet analogue means |
| CN110823538A (en) * | 2019-10-21 | 2020-02-21 | 南京钢铁股份有限公司 | High-pressure descaling nozzle simulation test device and test method thereof |
| CN112067480A (en) * | 2020-10-14 | 2020-12-11 | 河南理工大学 | Deep gas-containing coal rock pulsating fracturing experimental device and experimental method |
-
2021
- 2021-08-11 CN CN202110921081.9A patent/CN113686749A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213077A (en) * | 2011-05-25 | 2011-10-12 | 煤炭科学研究总院沈阳研究院 | Coal seam reaming system using three-dimensional (3D) swirling water jet and reaming and fracturing method for permeability enhancement |
| CN103234891A (en) * | 2013-04-22 | 2013-08-07 | 辽宁工程技术大学 | Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method |
| CN104533513A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | High-pressure abrasive material gas jet coal-breaking pressure relief and permeability improvement equipment and method |
| CN204505027U (en) * | 2015-04-14 | 2015-07-29 | 皖西学院 | A kind of adjustable distance formula sand-blasting machine |
| CN105064971A (en) * | 2015-09-08 | 2015-11-18 | 中国矿业大学 | High-pressure nitrogen blast cracking permeability increase experimental device and method |
| CN107100548A (en) * | 2017-06-20 | 2017-08-29 | 中国石油大学(北京) | Deep ＆ ultra-deep well confined pressure jet analogue means |
| CN110823538A (en) * | 2019-10-21 | 2020-02-21 | 南京钢铁股份有限公司 | High-pressure descaling nozzle simulation test device and test method thereof |
| CN112067480A (en) * | 2020-10-14 | 2020-12-11 | 河南理工大学 | Deep gas-containing coal rock pulsating fracturing experimental device and experimental method |
Non-Patent Citations (2)
| Title |
|---|
| 刘勇 等: "高压气体射流破煤应力波效应分析", 煤炭学报, vol. 41, no. 7, pages 1694 - 1700 * |
| 赵旭: "高压氮气冲击致裂煤岩体裂隙发育规律研究", 中国优秀硕士学位论文全文数据库 工程科技I辑, no. 3, pages 25 - 34 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116087459B (en) * | 2022-12-23 | 2023-09-19 | 重庆大学 | Liquid carbon dioxide punching fracturing coal seam simulation test system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101727405B1 (en) | Modification of Hoek triaxial cell for SHPB tests and its application to dynamic shear strength measurement of brittle materials | |
| US7559231B2 (en) | Leak inspection device | |
| CN110865012B (en) | Rock material in-situ seepage measurement system and method based on Hopkinson bar | |
| CN102373919B (en) | Experimental apparatus for evaluating coalbed methane cave well completion | |
| CN201794583U (en) | Well completion evaluation experiment device for coal bed methane cave | |
| CN104614298B (en) | Constant-volume gas-bearing coal gas-solid coupling physical and mechanical parameter testing device and testing method | |
| CN113686749A (en) | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method | |
| CN107191165A (en) | Both-end blocks water filling device in hole | |
| KR20180000746U (en) | Apparatus for sealing test of industrial valve | |
| CN112727444B (en) | Visual hole sealing material crack plugging performance testing device and method | |
| CN106323782A (en) | Pneumatic rebound test hammer | |
| US20140028078A1 (en) | Hyper-Pressure Pulse Excavator | |
| KR101108564B1 (en) | Pressure-Resistant Test Device and Pressure-Resistant Test Method | |
| CN114778401B (en) | Coal rock permeability measuring device and method under rock burst simulating condition | |
| CN105064971B (en) | A kind of high pressure nitrogen blast cracking anti-reflection experimental device and method | |
| CN112414852B (en) | System and method for testing dynamic damage performance of water-containing fracture | |
| CN211318054U (en) | Experimental system for researching action mechanism of explosive stress wave of surrounding rock | |
| CN112129487A (en) | Liquid CO2Experimental method for impact force influence factors and change rules of phase-change jet flow | |
| CN208108572U (en) | A kind of safe filling apparatus of refrigerant | |
| CN107091780A (en) | SERVO CONTROL true triaxial fluid fr acture and seam net monitoring test system | |
| CN114737925B (en) | Hydrofracturing coal rock mass gas seepage simulation device and extraction amount prediction method | |
| CN113866218A (en) | Experimental device and experimental method for inhibiting non-uniform concentration gas explosion by multi-phase medium | |
| CN108570991B (en) | Self-pressure-maintaining building supporting device and self-pressure-maintaining building supporting system | |
| CN116359041A (en) | System and method for testing impact shear permeability of artificial crack sample | |
| CN219472092U (en) | Hydraulic slotting simulation test equipment for extraction drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220218 Address after: 100013, 5 Youth Road, Heping Street, Beijing, Chaoyang District Applicant after: CCTEG CHINA COAL Research Institute Applicant after: China Coal Huajin Group Co., Ltd Address before: 100013, 5 Youth Road, Heping Street, Beijing, Chaoyang District Applicant before: CCTEG CHINA COAL Research Institute Applicant before: Wangjialing mine of China Coal Huajin Group Co., Ltd |
|
| TA01 | Transfer of patent application right |