True triaxial fluid-structure interaction coal body seepage test device
A technology of fluid-solid coupling and test equipment, which is applied in measurement equipment, permeability/surface area analysis, suspension and porous material analysis, etc., and can solve problems such as inability to accurately simulate and analyze coal permeability changes
Inactive Publication Date: 2016-07-20
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
At present, the experimental research on the change law of coal permeability has achieved fruitful results, but most of them are quasi-triaxial, which cannot accurately simulate and analyze the permeability change of coal under real stress conditions
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[0025] Such as Figure 1 to Figure 3 As shown, this embodiment provides a true triaxial fluid-solid coupling coal seepage test device, including a loading unit, a hydraulic servo unit 2 and a fluid unit 3 . Column 81, upper support plate 82 and lower support plate 83, column 81 is assembled and connected with upper support plate 82, lower support plate 83 respectively to form a support frame. The loading unit includes a hydraulic chamber, an upper hydraulic assembly, a lower hydraulic assembly, a left hydraulic assembly and a right hydraulic assembly. The hydraulic chamber includes a barrel body 11 with one end open and a cover plate 12 assembled and sealed with the barrel body 11. The barrel body 11 is assembled and connected to The lower support plate 83 and the barrel body 11 are provided with a liquid inlet 111 , a liquid outlet 112 and an exhaust port 113 , and the hydraulic servo unit 2 is connected to the liquid inlet 111 through the first hydraulic pipeline 41 . The u...
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The invention provides a true triaxial fluid-structure interaction coal body seepage test device.The device comprises a loading unit, a hydraulic servo unit, a fluid unit and control units.A hydraulic chamber comprises a barrel and a cover plate assembled on the barrel and connected with the barrel in a sealed mode.The hydraulic servo unit is connected with the hydraulic chamber, an upper hydraulic cylinder, a left hydraulic cylinder and a right hydraulic cylinder through a hydraulic pipeline.Hydraulic oil in the hydraulic chamber applies pressure in the front-back direction to a coal sample.The upper hydraulic cylinder drives an upper pressure head and a lower pressure head in an assisted mode to apply pressure in the up-down direction to the coal sample.The left hydraulic cylinder drives a left pressure head and the right hydraulic cylinder drives a right pressure head to apply pressure in the left-right direction to the coal sample.The fluid unit controls fluid to pass through the coal sample for fluid-structure interaction.The control units are arranged on the hydraulic servo unit, a weight sensor, a pressure sensor, a displacement sensor and a flowmeter in a signal connection mode to obtain relevant physical parameters.The device has the advantages that permeability changes of the coal body under the condition of three-dimensional stress can be precisely simulated and analyzed.
Description
technical field [0001] The invention relates to the technical field of mining engineering, in particular to a true triaxial fluid-solid coupling coal body seepage test device. Background technique [0002] Coal permeability is the basic parameter for studying gas migration in coal. Various gas dynamic phenomena in coal mining and their prevention, coalbed methane mining and gas drainage effects are all related to the permeability of coal body. Affected by mining in production practice, due to the effect of concentrated pressure, part of the coal body is compressed and deformed, the porosity is reduced, and the seepage of gas is hindered; or due to pressure relief, part of the coal body is deformed and new cracks are formed in the coal seam , to increase the permeability of coal. At present, fruitful results have been obtained in the experimental research on the change law of coal mass permeability, but most of them are quasi-triaxial, which cannot accurately simulate and a...
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 李文鑫杜文州王鹏飞
Owner SHANDONG UNIV OF SCI & TECH