True triaxial simulation test device for three-directional rigid loading impact ground pressure

Abstract

The invention provides a true triaxial simulation test device for three-directional rigid loading impact ground pressure. The problem that the simulation is not vivid in an existing impact ground pressure test device is solved. The true triaxial simulation test device comprises a pressure box, wherein the pressure box is internally provided with a pressure cavity, and further comprises a rigid loading unit and an impact loading unit; the inner periphery of the pressure cavity is provided with a flexible confining pressure loading jacket; the flexible confining pressure loading jacket has elastic deformation amounts in X, Y and Z directions; the rigid loading unit comprises loading oil cylinders of the pressure box in the X, Y and Z directions; telescopic shafts of the loading oil cylinders penetrate through the outer wall of the pressure box and the inner ends of the telescopic shafts are fixedly connected with loading base plates; the inner surfaces of the loading base plates abut against the outer surface of the flexible confining pressure loading jacket; and the impact loading unit comprises a lifting device in the Z direction and an impact weight is hung under the lifting device. According to the true triaxial simulation test device, the influences of deformation with one another in the three directions are solved, and the influences of a supporting effect are also avoided, so that the impact ground pressure is simulated relatively vividly.

Description

technical field [0001] The invention belongs to the technical field of deep rock mass engineering, and relates to equipment for experiments, in particular to a three-axis simulation test device for three-way rigid load impact ground compaction. Background technique [0002] Rockburst is a phenomenon in which the elastic variable energy accumulated in a coal (rock) body is released suddenly and violently under certain conditions, causing the coal (rock) to burst and be ejected, and is further strengthened by the surrounding rock during the destruction process. Quick squeeze action releases huge energy instantly. It is often accompanied by loud noises and rock mass vibrations, often causing bracket breakage, roof caving, roadway blockage, and casualties, posing a huge threat to production safety. [0003] With the continuous increase of coal mining depth and mining intensity in my country, the distribution of rockburst mines is becoming wider and wider. Rockburst disasters ar...

AI Technical Summary

Problems solved by technology

However, there is currently no equipment that can satisfy the above four conditions at the same time. Considering the laboratory simulation of rock burst that can supplement loading under different axial pressure states has always been one of the frontier topics in the field of rock mass engineering.

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