Dynamic and static combined loading rock testing machine and test method that can be used for multiphase coupling

Abstract

The invention discloses a dynamic and static combined loading rock testing machine and testing method which can be used for multiphase coupling. The device is composed of four parts: a visual confining pressure loading chamber module, an air pressure control module, a dynamic loading module and a constant capacity module; The loading chamber of the chamber module is a steel cylinder structure with an outer square and an inner circle. Windows are opened on three sides, and tempered high borosilicate glass is embedded in the window to realize the visualization of the test process. The rear door is opened on one side to facilitate the exchange of specimens and can be installed in the loading chamber. All kinds of monitoring devices are led out through the sensor lead channel of the bottom plate to realize the real-time monitoring of the physical and mechanical parameters of the test piece during the test; Accurate, quantitative and visual monitoring of the adsorption and desorption characteristics under the coupled form, the permeability of gas-containing coal at different loading stages, and the process of damage expansion and failure.

Description

technical field [0001] The invention belongs to the scientific research and technical fields of mining engineering and geotechnical engineering, in particular to a method for researching and revealing the adsorption and desorption law of gas-containing coal mass under static loading and dynamic disturbance shock state, and the permeability of gas-containing coal mass in different loading stages. Test device system and test method for change law and damage expansion mechanism. Background technique [0002] Coal and gas outburst is a very complex dynamic phenomenon. J. Hanes et al., based on the investigation and analysis of coal and gas outburst in Australia, divided the development process of coal and gas outburst into four stages: excitation stage, critical stage, occurrence stage and end stage. The outburst excitation stage is described as: the deformation and failure of the gas-bearing coal body reaches a certain critical condition or a disturbance load is suddenly appli...

AI Technical Summary

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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