Water-ice phase change frost heaving effect multi-dimensional parameter testing device and method
A technology of parameter testing and phase change, which is applied to the testing of multi-dimensional parameters of water-ice phase change and frost-heaving effect, the multi-dimensional parameter testing device of water-ice phase change and frost-heaving effect, and the field of multi-dimensional parameter testing devices, which can solve the problem of low coal seam permeability and equipment failure. Damage, mine shutdown, etc.
Pending Publication Date: 2021-12-17
XIAN UNIV OF SCI & TECH
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However, due to the complex geological structure of our country, low coal seam permeability and incomplete pore development, the gas drainage effect is not ideal, and gas disasters are prone to occur. As an important factor restricting the development of the coal industry, gas disasters will cause casualties and equipment damage. and mine shutdown
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[0027] Embodiment Water-ice phase change frost heaving effect multi-dimensional parameter test device, test method
[0028] The "front", "rear", "left" and "right" mentioned in this embodiment are all defined for convenience of description, and do not constitute a limitation to the protection scope of the present invention.
[0029] This embodiment provides a multi-dimensional parameter testing device for water-ice phase transition frost heaving effect, such as figure 1 , figure 2 shown, including:
[0030] 1) The liquid nitrogen supply mechanism is used to inject liquid nitrogen into the test coal body 6-10. The liquid nitrogen supply mechanism in this implementation adopts the liquid nitrogen tank 1 in the prior art, and the liquid nitrogen tank 1 is connected to the subsequent pressure test system 6 through the pipeline 4, and the outlet of the liquid nitrogen tank 1 is provided with a Nitrogen flow control valve 2.
[0031] 2) The pressure test system 6 is used to pro...
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The invention discloses a water-ice phase change frost heaving effect multi-dimensional parameter testing device and method. The device comprises a liquid nitrogen supply mechanism, a pressure testing system, a signal collecting system and a data processing system, wherein the outlet of the liquid nitrogen supply mechanism is connected with a test coal body in the pressure testing system through a pipeline, and the signal output ends of the pressure testing system and the signal collecting system are respectively connected with the data processing system. The method comprises the following steps: injecting liquid nitrogen into a drill hole of a test coal body in a pressure testing system, and performing information collection on the frost heaving pressure of the liquid nitrogen freezing test coal body, the deformation of the test coal body, the surface temperature distribution gradient of the test coal body and the liquid nitrogen flow by using the pressure testing system and a signal collecting system; and enabling a data processing system to obtain water-ice phase change frost heaving parameters of different liquid nitrogen flow test coal bodies by using the collected information. According to the invention, the device can effectively measure the multi-dimensional parameters of the water-ice phase change frost heaving effect of the coal body in the liquid nitrogen freezing test; according to the measuring method, the optimal liquid nitrogen flow can be effectively determined, and reference is provided for engineering practice; and the testing device disclosed by the invention can be used for measuring any test coal body.
Description
technical field [0001] The invention belongs to the field of coal mining, and relates to a multi-dimensional parameter testing device, in particular to a multi-dimensional parameter testing device for water-ice phase change frost heave effect, and the invention also provides a water-ice phase change frost heave multi-dimensional parameter test device test method. Background technique [0002] As a clean energy, gas can improve the energy status, optimize the energy structure, and alleviate environmental pollution caused by fossil fuels. However, due to the complex geological structure of our country, low coal seam permeability and incomplete pore development, the gas drainage effect is not ideal, and gas disasters are prone to occur. As an important factor restricting the development of the coal industry, gas disasters will cause casualties and equipment damage. and mines shut down. [0003] For this reason, in recent years, a large number of coal seam fracturing technolog...
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IPC IPC(8): G01N25/14G01D21/02
CPCG01N25/14G01D21/02
Inventor 秦雷王平马超林海飞杨二豪龙航闫冬洁白杨
Owner XIAN UNIV OF SCI & TECH