Dynamic and static combined loading rock test machine and test method used for multiphase coupling

Abstract

The invention discloses a dynamic and static combined loading rock test machine and test method used for multiphase coupling. The machine comprises a visual confining pressure loading chamber module, air pressure control modules, a dynamic loading module and constant volume modules; and the loading chamber of the visual confining pressure loading chamber module is a steel cylinder structure with a square outside and a circular inside, three surfaces of the loading chamber has windows, high borosilicate glass is embedded in every window to realize the visualization of the test process, an opening in one surface of the loading chamber is provided with a rear door which is convenient to replace and take a test piece, and various monitoring devices are arranged in the loading chamber and are led out through sensor lead wires of a baseboard to realize real-time monitoring of all physical-mechanical parameters of the test piece in the test process. The machine has the advantages of small size, simple structure, convenience in dismounting, and realization of accurate, quantitative and visual monitoring of the adsorption-desorption characteristic of a coal rock standard test piece in different load forms and coupling form and the permeability and the damage dilatancy process of gas-containing coal body in different loading stages.

Description

technical field [0001] The invention belongs to the field of mining engineering and geotechnical engineering scientific research technology, and particularly relates to a method for researching and revealing the adsorption and desorption laws of gas-containing coal bodies under static loading and dynamic disturbance impact states of coal rock mass, and the infiltration of gas-containing coal bodies at different loading stages. The test device system and test method for the change law and the damage expansion and failure mechanism. Background technique [0002] Coal and gas outburst is a very complex dynamic phenomenon. Based on the investigation and analysis of coal and gas outburst in Australia, J. Hanes et al. divided the development process of coal and gas outburst into four stages: excitation stage, critical stage, occurrence stage and end stage. For the outburst excitation stage, it is described as: the deformation and destruction of the gas-bearing coal body reaches a...

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Problems solved by technology

[0010] 1. Regardless of the size of the above-mentioned test devices, they cannot realize the dynamic loading of the coal-rock specimen under the action of triaxial static loading and multi-phase coupling;

[0011] 2. The operation of the above-mentioned test device is complex, bulky, single-function, and most of them can only qualitatively observe the damage phenomenon, and it is difficult to realize the visual real-time monitoring of the test process

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