Simulation test device and test method for bearing performance of gangue wall anchored in gob-side entry retaining

Abstract

The invention discloses a device and method for a simulation test of the load-carrying property of a gob-side entry retaining anchoring pack wall. The device is composed of a U-shaped filling groove, a load-carrying plate, anchoring filler and a displacement measuring device. The method comprises the steps that a laboratory loading control system is used for applying pressure on a pressure transmission structure, during compression, the movement distances of a displacement measuring rule and corresponding tester load values are recorded at certain intervals, and axial displacement values are recorded; according to the load values, the axial displacement values and transverse displacement values, the stress values and the strain values, generated at different moments during loading, of the transverse anchoring filler are obtained through conversion; finally, the stress-strain relation curve, generated during loading, of the filler is drawn, and therefore the load-carrying property parameter of the transverse anchoring filler is determined. By the adoption of the device and method for the simulation test of the load-carrying property of the gob-side entry retaining anchoring pack wall, the problems of simplicity, nonrepeatability and the complicated on-site test environment of testing and inspection of coal mine underground gob-side entry retaining gangue filling are solved, and the device and method have an important significance in guiding application of the coal mine underground gob-side entry retaining transverse anchoring pack wall technology.

Description

technical field [0001] The invention relates to a device and method for testing the load-carrying performance of anchorage structures, in particular to a device and method for simulating the load-bearing performance of laterally anchored gangue walls along gob-side entry retaining. Background technique [0002] Gob-side entry retention technology has always been an important technical development direction of coal mining in my country. It has a significant effect on reducing the amount of roadway excavation, improving the recovery rate of coal resources, reducing waste rock emissions, prolonging the service life of mines, alleviating the contradiction of mining replacement, and realizing safe, efficient and green mining in mines. Among the many technical researches on gob-side entry retention, the technology of gangue filling gob-side entry retention is the most widely used. Under the current technical level, the success or failure of gob-side entry retention depends to a la...

AI Technical Summary

Problems solved by technology

However, in the actual application of underground coal mines, the gangue filling body is an irreversible compression material, which is time-consuming and laborious to transport, and it is impossible to conduct too many underground field tests; at the same time, due to the particularity and complexity of the underground working environment of coal mines, it is also impossible to The actual system analysis of the force of the bolts and steel strips in the filling body, coupled with the difficulty in controlling the deformation of the roadway, the rapid advancement of the filling process and the synchronization of the working face, etc., make it difficult to carry out in-situ testing in coal mines

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