Controllable experiment device for simulating roadway unloading and method for applying controllable experiment device

Abstract

The invention discloses a controllable experiment device for simulating roadway unloading. The controllable experiment device comprises a material similarity simulation system, a high-pressure impact system and a signal acquisition and analysis system. The high-pressure impact system is connected with a high-pressure gas control system by a high-pressure gas delivery pipe. The controllable experiment device has the advantages that the material similarity simulation system can accurately simulate mechanical properties of blasted roadway surrounding rock by the aid of different types of stress variation generated after the high-pressure impact system is collided, and accordingly various shortcomings of instantaneous unloading experiments carried out by the aid of blasting modes at present can be overcome; integral experiment systems are convenient to disassemble and assemble, so that repeated experimental simulation can be facilitated.

Description

technical field [0001] The invention relates to the field of material performance testing, in particular to a controllable experimental device for simulating roadway unloading and a use method thereof. Background technique [0002] For a long time, the research on the stress-strain state change of the surrounding rock of the underground roadway is mainly carried out by using elastic-plastic mechanics tools and within the scope of the continuum mechanics model. Due to the excavation, stress concentration and stress redistribution of the roadway, the areas around the underground roadway are divided into successively arranged areas: the damaged area around the roadway, the inelastic deformation area and the "undisturbed" area of ​​the rock mass. The scope of these areas is determined by the natural stress field and deformation-strength eigenvalues ​​of the rock mass, but for deep engineering, the essence of deep mining is the process of unloading and dynamic disturbance of rock...

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Problems solved by technology

[0003] At present, the physical simulation method of surrounding rock unloading is to apply impact load through blasting, but the impact load applied in this way cannot be quantified, and it is difficult to accurately and repeatedly simulate the damage process of the surrounding rock around the roadway when the impact rock pressure occurs, and it cannot be effectively tested. Surrounding rock unloading process

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