Simulation test device and simulation test method for coal measure strata fracture seepage under loading and unloading conditions

Abstract

The invention discloses a simulation test device and a simulation test method for coal measure strata fracture seepage under loading and unloading conditions. The device comprises an experimental tank, a hydraulic pressure control loading system, a confining pressure loading system, a fracture structure, a deformation test system and a seepage characteristic parameter test system. According to the method, a way of filling the experimental tank with a coal measure strata physical similar simulation material and large-scale concrete block structure fracture is adopted, physical simulation tests of coal measure strata large-scale structure fracture deformation and seepage coupling effect processes due to the loading and unloading action under the conditions of top plate load, top plate hydraulic pressure, and adjustable confining pressure can be implemented, so that various mechanisms and key parameters such as different coarse structure fracture macroscopic deformation, saturated seepage and mutual coupling effect thereof, fracture seepage characteristic mutation under the loading and unloading conditions can be obtained or quantitatively described, further, mining-induced fracture structure evolution and seepage dynamic characteristic under the mining disturbance action can be effectively understood and revealed, and a theoretical basis is provided for further deepened research on mine water disaster mechanisms as well as prevention and control technologies.

Description

technical field [0001] The invention relates to a physical similarity simulation test device and a test method for seepage flow in coal measure strata fissures under loading and unloading conditions, which can better simulate the coupling effect of fracture deformation and seepage flow of different occurrence structures under loading and unloading conditions, and belongs to mine water-bearing under the action of mining disturbance. Layer structure damage and water inrush disaster prevention and control. Background technique [0002] In the process of underground coal seam mining, the stress redistribution of the surrounding rock mass in the stope and the release of energy storage lead to rock mass deformation, layer separation and vertical fracture, and the macroscopic fractures formed provide effective storage for the movement of water (sand) bodies in the aquifer. Space and migration channels, the further expansion and connection of mining fractures under the action of gro...

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Problems solved by technology

[0004] Due to the heterogeneity and anisotropy characteristics of fractured media, it is very difficult to establish a corre

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