System and method for dynamic disaster and displacement simulation test of deep high geostress coal and rock mass

Abstract

The invention discloses a dynamic disaster and displacement simulation test system and method for deep high geostress coal and rock mass, which includes a cavity for placing test rock samples, and a stress loading module for applying triaxial stress is arranged on the cavity. The upper and lower ends of the cavity are provided with a reaction module to resist triaxial stress and provide reaction support; one side of the cavity is provided with a filling mechanism for injecting and discharging high-pressure gas / liquid into the cavity, and the other end is provided with a cavity that can realize The roadway excavation and instant opening module that is closed and connected to the outside world, by controlling its opening and closing, the test rock sample can complete the multi-field coupling reaction in the deep high geostress gas / liquid environment in the cavity; A turning module that pushes the cavity to move between horizontal and vertical orientations. It can realize the simulation of working conditions such as tunnel excavation under the condition of true triaxial high ground stress, and can also realize the test functions of surface aeration and water injection of model materials to simulate coal and gas adsorption and desorption, hydraulic splitting and driving.

Description

technical field [0001] The invention relates to a dynamic disaster and displacement simulation test system and method of deep high geostress coal and rock mass, in particular to the dynamic disaster and displacement simulation of deep high geostress gas (liquid) coal rock mass. Background technique [0002] At present, research methods in the field of underground engineering mainly include theoretical analysis, numerical calculation, geomechanical model tests, and on-site monitoring and measurement. Theoretical analysis and numerical calculation are difficult to solve and deal with large and complex projects. In contrast, model tests have the advantages of repeatability, high safety, good economy, strong pertinence, and reliable data. Considering comprehensively, indoor model tests combined with Numerical calculation, theoretical analysis and on-site monitoring mutually confirm the conclusions and rules, which are more scientific and reliable. In this regard, scholars at ho...

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Problems solved by technology

However, the device cannot be used for ground stress loading

[0007] (4) The Chinese patent application number 201410748044.2 discloses an integrated coal and gas adsorption, desorption and outburst test device and test method. The device mainly includes a cylindrical coal sample chamber, several pressure and temperature sensors, and one end of the coal sample chamber is fixed Equipped with hydraulic loading and gas charging equipment, the other end is provided with a coal and gas outlet, and a quick release mechanism is arranged at the coal and gas outlet; the hydraulic loading and gas charging equipment includes a piston rod, and a piston rod is provided with a coal sample chamber. Cavities match the piston, the end of the piston rod is connected with the surface-type gas-filled loading disk, the piston and the surface-type gas-filled loading disk are respectively located in two independent cavities in the coal sample chamber, between the piston and the surface-type gas-filled loading disk and the longitudinal partition The space of the space respectively communicates with two hydraulic station interfaces on the outer wall of the coal sample. This device can study the adsorption and desorption characteristics of coal to gas and the outburst mechanism of coal and gas under the conditions of different in-situ stresses and different gas pressures. However, the device It is impossible to achieve true triaxial loading under high ground stress conditions, and the material assembly in the test process requires a lot of labor, and the degree of intelligence is slightly low

[0010] 1. Regardless of the size of the above-mentioned test devices, they cannot simultaneously realize the coupling test of coal rock and gas / liquid true triaxial multi-physics field under high ground stress loading conditions;

[0011] 2. The above-mentioned model test device has defects such as difficult filling of test materials during the test process, low mechanization and low intelligence of the device system, which lead to cumbersome and time-consuming actual operation, and increase the unsafe factors of the test

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