Multi-field coupled coal rock impact loading experimental device and method

Abstract

The invention relates to a multi-field coupled coal rock impact loading experimental device and method. The experimental device comprises an axial static pressure loading device, an axial static pressure loading hydraulic oil pump, an axial static pressure oil delivery pipe, an ambient pressure loading hydraulic oil pump, an ambient pressure loading oil delivery pipe, a radial ambient pressure loading device, a gas tank, a gas inlet pipe, a gas pressure regulating valve, an air extracting pump, a gas sensor, a gas outlet pipe, a cold and hot dual-purpose compressor, a servo oil pump and a cold and hot dual-purpose oil delivery pipe. By using the experimental device and method, a coal rock sample can be in a multi-field coupling state and the condition that the coal rock sample is in axial static loading, radial ambient pressure static loading, gas pressure and temperature coupling states, so that an experiment can be carried out aiming to the dynamic loading conditions.

Description

technical field [0001] The invention belongs to the technical field of testing mechanical properties of coal and rock, and more specifically relates to an experimental device and an experimental method for simulating static stress, temperature, gas adsorption multi-field coupling state coal and rock impact loading. Background technique [0002] In the mining process of underground coal resources, a large number of mechanized fully mechanized coal cutters are used to crush coal and rock, the roof of the gob is periodically dropped, and the blasting and excavation of rock roadways near the working face have a great impact on the coal and rock mass of the working face. The obvious impact dynamic disturbances lead to frequent dynamic disasters of deep coal-rock gas, which seriously endanger the life safety of miners. In order to study the mechanism of deep coal-rock gas dynamic disasters, it is necessary to explore the dynamic mechanical characteristics of coal rock under impact ...

AI Technical Summary

Problems solved by technology

[0004] The existing simulation experimental devices for the study of dynamic disasters in the process of mining deep mine resources can be mainly divided into the following categories: (1) Dynamic and static load stress coupling, such as dynamic and static load combined loading experimental devices, but this type of experimental device, the sample Exposed to the air, it is impossible to carry out experiments on the mechanical properties of coal and rock in a simulated gas environment; (2) Gas-solid environment coupling, gas environment mechanics experimental device Rock mass static quasi-static loading process, adsorption and desorption and seepage characteristics experiments

[0005] However, in the process of deep coal mining, the coal and rock mass is subjected to the joint action of high ground stress static load, strong dynamic disturbance in the mining process, high ground temperature and high gas pressure, and its stress mode is no longer a single static stress, dynamic load, temperature or Gas pressure is the effect of multi-physics field coupling, which cannot be considered by existing experimental devices and experimental methods

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