Filling body biaxial loading system based on uniaxial testing machine transformation and use method

Abstract

The invention provides a filling body biaxial loading system based on uniaxial testing machine transformation and a use method, and belongs to the technical field of filling body mechanical property research. The system comprises a uniaxial testing machine, a loading cushion block, a uniaxial testing machine data collecting and processing system, a counter-force baffle, a counter-force baffle fixing device, a pressure head, a pressure chamber, a ball screw, a pressure sensor, a displacement sensor, a data collector, a connecting line, a computer and a test piece. The counter-force baffle and the pressure head are arranged on the left side of the test piece, a lateral pressurization system is formed by the pressure head, the ball screw, a coupler, a speed reducer and a motor on the right side, and the pressure sensor, the displacement sensor, the data collector and the computer are arranged for lateral pressure and displacement measurement. The system is based on a commercialized uniaxial testing machine, has the advantages of high reliability of test data, simplicity in processing, lower manufacturing cost, simplicity in operation and high use flexibility, and can be widely applied to mines adopting a filling mining method.

Description

technical field [0001] The invention relates to the technical field of research on the mechanical properties of filling bodies, in particular to a filling body biaxial loading system based on the transformation of a uniaxial testing machine and a use method. Background technique [0002] With the rapid advancement of my country's industrialization process, the demand for mineral resources continues to increase, shallow resources are exhausted, and deep mining has become an inevitable trend of mine development. The empty field method and the caving method will not be suitable for a series of problems such as high ground pressure, high well temperature, high well depth and strong disturbance in the deep environment. The filling mining method can maximize the use of surface tailings and effectively control the ground pressure. Widely used in mines. [0003] The ultimate goal of any kind of filling mining method is to solidify and seal the goaf with filling materials to ensure ...

AI Technical Summary

Problems solved by technology

According to the previous research results, if the design is based on the uniaxial strength criterion, the influence of stress in other directions on the mechanical properties of the filling body is ignored, and the structure will be conservative, which will increase the filling cost.

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