CN210347334U - Rock failure test device under high pore pressure and stress wave combined action - Google Patents
Rock failure test device under high pore pressure and stress wave combined action Download PDFInfo
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- CN210347334U CN210347334U CN201920575268.6U CN201920575268U CN210347334U CN 210347334 U CN210347334 U CN 210347334U CN 201920575268 U CN201920575268 U CN 201920575268U CN 210347334 U CN210347334 U CN 210347334U
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Abstract
The utility model discloses a test device of rock destruction under high pore pressure and stress wave combined action, test device comprises style loading device, high-pressure gas generating device and stress wave generating device. The sample loading device comprises a base, a cylindrical high-pressure bin, a fragile sealing film, an air pressure dynamic sensor, a stress wave sensor and the like; the high-pressure gas generating device consists of a high-pressure sealing device, a control valve and a pressure gauge and is connected with a reserved gas inlet of the cylindrical high-pressure bin through a gas inlet pipe; and the stress wave generating device is placed at the bottom of the rock sample to emit stress waves. The testing device has simple structure, reasonable design and easy assembly; the purpose of automatically opening the protrusion opening is achieved by arranging the brittle sealing sheet, so that the influence of the speed of manually opening the protrusion opening on rock breakage or coal and gas protrusion is eliminated; meanwhile, the influence of stress waves generated by activities such as earthquake, construction load, blasting and the like is considered.
Description
Technical Field
The utility model relates to a rock mechanics experiment field specifically is a test device of rock destruction under high pore pressure and stress wave combined action.
Background
In the field of development and utilization of deep underground energy and resources in China, the exploitation depth is getting larger and larger. In deep underground environments, rocks often contain high-pressure gas, and the rocks may burst when influenced by stress waves generated by activities such as earthquakes, construction loads, and blasting. If coal seam (coal belongs to one of rock, hereinafter referred to as rock, not described in detail) contains high-pressure gas, coal and gas outburst may be caused, and huge energy of disaster outburst can destroy equipment, cause economic loss, and also cause casualties.
Although a great deal of research and test are carried out at home and abroad on the mechanism of rock fracture caused by high-pressure gas, the occurrence mechanism is complex due to a plurality of influencing factors. The current research still stays at the stage of qualitative analysis and semi-quantitative description for related knowledge, and the knowledge of the occurrence mechanism is not clear and definite, so that a great amount of manpower, material resources and financial resources are invested in deep underground engineering to prevent and control related disasters, and the economic benefit is restricted. Therefore, the exploration of the occurrence mechanism of rock fracture caused by high-pressure gas has important significance for disaster prevention and control, and improvement of productivity and economic benefit.
At present, the method used at home and abroad is to fill high-pressure gas into a closed container containing rocks, and after the adsorption of the rocks is balanced, a protruding opening of the container is suddenly opened, so as to simulate the occurrence of relevant conditions. However, the simulation device used in the existing research needs to be manually opened, and the speed of manually opening the projection port influences the time and energy change rule of rock fracture; furthermore, the influence of stress waves has not been considered in the prior art.
Disclosure of Invention
The utility model discloses aim at overcoming prior art's shortcoming, provide a test device to rock (coal sample) destruction under high pore pressure and the stress wave combined action to explore the emergence and the mechanism evolution law of relevant phenomenon.
The utility model discloses a realize above-mentioned purpose through following technical scheme:
a test device for rock destruction under the composite action of high pore pressure and stress wave comprises a pattern loading device, a high-pressure gas generating device and a stress wave generating device; the sample loading device comprises a base, a high-pressure chamber is arranged above the base, a detachable cover with a protruding opening is arranged above the high-pressure chamber, a brittle sealing film is sealed at the protruding opening of the cover, an air pressure dynamic sensor and a stress wave sensor are arranged on the high-pressure chamber, the air pressure dynamic sensor and the stress wave sensor are connected with a data recorder, and the data recorder is connected with a computer through a data line; the high-pressure gas generating device comprises a high-pressure sealing tank body, a control valve and a pressure gauge are arranged above the high-pressure sealing tank body, and the high-pressure gas generating device is connected with a reserved gas inlet of the high-pressure bin through a gas inlet pipe; the stress wave generating device comprises a stress wave controller and a stress wave emitter, wherein the emitter on the stress wave controller is arranged on the high-pressure cabin to emit stress waves.
The test device performs the test through the following steps:
(1) putting the rock test piece into a high-pressure bin;
(2) installing an air pressure dynamic sensor;
(3) installing a brittle sealing film and checking the tightness of the brittle sealing film;
(4) installing a stress wave controller, a transmitter and a stress wave sensor;
(5) gas is injected from the gas inlet pipe, so that the high-pressure cabin reaches a constant high-pressure state, and the stress wave generator is started after the high-pressure state lasts for a certain period of time. The emitted stress wave triggers the opening of the brittle sealing film, gas is released, then the test piece is damaged under the combined action of the stress wave and the gas release, and the data of the air pressure dynamic sensor and the stress wave sensor in the test process are recorded.
Foretell high pore pressure and stress wave combined action rock destruction's test device down, high-pressure chamber passes through threaded connection with the top lid.
According to the testing method of the testing device for rock destruction under the composite action of high pore pressure and stress waves, the high-pressure cabin is matched with the covers of the protruding openings with different radiuses, so that the openings with different radiuses can achieve the purpose of controlling the pressure relief rate of gas.
The utility model discloses beneficial effect for prior art is:
the testing device has simple structure, reasonable design and easy assembly; the purpose of automatically opening the protrusion opening is achieved by arranging the brittle sealing sheet, so that the influence of the speed of manually opening the protrusion opening on rock breakage or coal and gas protrusion is eliminated; meanwhile, the influence of stress waves generated by activities such as earthquake, construction load, blasting and the like is considered. The practicability is strong, and the popularization and the use are convenient.
Drawings
Fig. 1 is the utility model provides a test device schematic structure of rock destruction under high pore pressure and stress wave combined action.
In the figure: the method comprises the following steps of 1-base, 2-high pressure bin, 3-brittle sealing film, 4-cover, 5-air pressure dynamic sensor, 6-stress wave sensor, 7-high pressure sealing tank, 8-control valve, 9-pressure gauge, 10-air inlet pipe, 11-data recorder, 12-computer, 13-stress wave generator, 14-rock test piece and 15-emitter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples, which are for further explanation of the contents, features and effects of the present invention.
As shown in fig. 1: the utility model provides a test device of rock destruction under high pore pressure and stress wave combined action, include: a sample loading device, a high-pressure gas generating device and a stress wave generating device.
Sample loading device includes base 1, base top installation cylinder high pressure storehouse 2, this cylinder high pressure storehouse top is equipped with detachable and has lid 4 of outstanding mouth, lid 4 and cylinder high pressure storehouse 2 pass through threaded connection, lid 4 has fragile closed film 3 at outstanding mouthful sealed, and pottery can be chooseed for use to the material of fragile closed film 3, and fragile closed film 3 is thin potsherd, and the leakproofness is realized through sealed glue. The cylinder high pressure cabin 2 is provided with an air pressure dynamic sensor 5 and a stress wave sensor 6 respectively, the air pressure dynamic sensor 5 and the stress wave sensor 6 are connected with a data recorder 11, and the data recorder is connected with a computer 12 through a data line.
The high-pressure gas generating device comprises a high-pressure sealing tank body 7, and a control valve 8 and a pressure gauge 9 are arranged above the high-pressure sealing tank body 7. The high-pressure gas device is connected with a reserved gas inlet of the cylindrical high-pressure cabin 2 through a gas inlet pipe 10.
The transmitter 15 on the stress wave generator 13 is arranged on the high-pressure chamber 2 for transmitting the stress wave.
The test method is realized by the following steps:
(1) placing the rock test piece 14 into the cylindrical high-pressure bin 2;
(2) installing an air pressure dynamic sensor 5;
(3) installing the brittle sealing film 3 and checking the tightness of the brittle sealing film;
(4) installing the stress wave controller 13, the emitter 15 and the stress wave sensor 6;
(5) gas is injected from the gas inlet pipe 10 so that the cylindrical high-pressure chamber 2 reaches a constant high-pressure state, and the stress wave generator 13 is turned on after a certain period of time in the high-pressure state. The emitted stress wave triggers the opening of the brittle sealing film, and the gas is released. The high-pressure chamber 2 is matched with covers 4 with protruding openings with different radiuses, so that the openings with different radiuses can achieve the purpose of controlling the pressure relief rate of gas.
Therefore, the test piece is damaged under the combined action of stress waves and gas pressure relief, and data of the air pressure dynamic sensor 5 and the stress wave sensor 6 in the test process are recorded.
Due to the low permeability characteristic of the rock sample, the rock sample needs to continuously permeate for more than 10 hours in saturated high-pressure gas.
Before testing, the testing device firstly scans each test piece by using high-precision CT, determines the distribution characteristics of original pores and cracks of the test piece, and draws a three-dimensional crack distribution model in a computer; scanning the surface of the test piece and the pore and crack distribution of the surface of the drilled hole by using an electron microscope, and drawing a surface pore and crack distribution map of each test piece; during the test, the size of the air pressure and the characteristics (such as wavelength, frequency, amplitude and the like) of the stress wave need to be recorded; measuring the proliferation distribution characteristics of the cracks of the rock mass sample in the shock wave action process by using an acoustic emission instrument; after the test, internal cracks and surface crack distribution characteristics of the rock mass sample after the shock wave action are drawn in a three-dimensional graph by utilizing a CT (computed tomography) and an electron microscope, the crack growth and failure rule and the relation among air pressure, stress wave characteristics and original pores are analyzed, a mechanical analysis model of the rock mass under the coupling action of the air pressure and the stress wave is established, conditions and mechanisms of crack generation, expansion and failure under different environmental conditions are analyzed, and basic rock mass crack propagation and failure criterion under the coupling action of static load, pore pressure and the stress wave is established.
Compared with the prior art, the test device has simple structure, reasonable design and easy assembly; the purpose of automatically opening the protrusion opening is achieved by arranging the brittle sealing film, so that the influence of the speed of manually opening the protrusion opening on rock breakage or coal and gas protrusion is eliminated; meanwhile, the influence of stress waves generated by activities such as earthquake, construction load, blasting and the like is considered. The practicability is strong, and the popularization and the use are convenient.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several modifications and applications can be made, and these modifications and applications are also considered as the protection scope of the present invention.
Claims (3)
1. The utility model provides a test device that rock was destroyed under high pore pressure and stress wave combined action which characterized in that: the device comprises a sample loading device, a high-pressure gas generating device and a stress wave generator; the sample loading device comprises a base (1), a high-pressure chamber (2) is arranged above the base, a detachable cover (4) with a protruding opening is arranged above the high-pressure chamber, a brittle sealing film (3) is sealed at the protruding opening of the cover (4), an air pressure dynamic sensor (5) and a stress wave sensor (6) are arranged on the high-pressure chamber (2), the air pressure dynamic sensor (5) and the stress wave sensor (6) are connected with a data recorder (11), and the data recorder (11) is connected with a computer (12) through a data line; the high-pressure gas generating device comprises a high-pressure sealing tank body (7), a control valve (8) and a pressure gauge (9) are arranged above the high-pressure sealing tank body (7), and the high-pressure gas generating device is connected with a reserved gas inlet of the high-pressure bin (2) through a gas inlet pipe (10); the stress wave generating device comprises a stress wave controller (13) and a stress wave emitter, wherein the emitter (15) on the stress wave controller (13) is arranged on the high-pressure cabin (2) to emit stress waves.
2. The device for testing rock failure under the combined action of high pore pressure and stress wave of claim 1, wherein: the high-pressure cabin (2) is connected with the upper cover (4) through threads.
3. A device for testing rock failure under combined action of high pore pressure and stress wave according to claim 1 or 2, characterized in that the high pressure chamber (2) is provided with covers (4) with protruding openings of different radii, so that the openings of different radii can control the pressure relief rate of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920575268.6U CN210347334U (en) | 2019-04-25 | 2019-04-25 | Rock failure test device under high pore pressure and stress wave combined action |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920575268.6U CN210347334U (en) | 2019-04-25 | 2019-04-25 | Rock failure test device under high pore pressure and stress wave combined action |
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| CN210347334U true CN210347334U (en) | 2020-04-17 |
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| CN201920575268.6U Expired - Fee Related CN210347334U (en) | 2019-04-25 | 2019-04-25 | Rock failure test device under high pore pressure and stress wave combined action |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095346A (en) * | 2019-04-25 | 2019-08-06 | 太原理工大学 | The experimental rig and test method of the rock failure mechanism of rock under high pore pressure and stress wave compound action |
-
2019
- 2019-04-25 CN CN201920575268.6U patent/CN210347334U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095346A (en) * | 2019-04-25 | 2019-08-06 | 太原理工大学 | The experimental rig and test method of the rock failure mechanism of rock under high pore pressure and stress wave compound action |
| CN110095346B (en) * | 2019-04-25 | 2024-02-27 | 太原理工大学 | Rock damage test device and test method under high pore pressure and stress wave composite action |
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Granted publication date: 20200417 |
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