A rock mechanics test system and test method with adjustable loading stiffness

Abstract

The invention discloses a rock mechanics test system and a test method with adjustable loading stiffness. The test system comprises a loading unit, which is used for loading a rock specimen; a variable stiffness unit, which is used for adjusting the stiffness of the loading unit during the loading process; The monitoring unit is used to monitor the pressure change of the rock specimen and the stiffness change of the loading unit, and generate monitoring data; the data analysis unit is connected with the loading unit, the variable stiffness unit and the monitoring unit respectively, and the data analysis unit is used to control the loading unit Loading, and the data analysis unit is also used to process and analyze the received monitoring data, and control the variable stiffness unit to adjust the stiffness of the loading unit according to the analysis result. The invention makes the rock mechanics test more close to the actual production conditions, and meanwhile, the invention not only fills the blank in this field at home and abroad, but also has the advantages of simple test operation and more accurate research results.

Description

technical field [0001] The invention relates to the technical field of rock mechanics test systems, in particular to a rock mechanics test system and a test method with adjustable loading stiffness. Background technique [0002] Rock burst is one of the main dynamic disasters in coal mining. With the transfer of coal mining to deep areas, frequent rock burst accidents have caused a large number of casualties and property losses, seriously affecting the safe and efficient production of coal mines. For this reason, scholars at home and abroad have carried out many years of research on rock burst and achieved rich results. However, due to the complexity of rock burst itself, there are still many problems that have not been solved. The prevention and control of coal mine rock burst has become a worldwide problem. One of miscellaneous diseases is a hot topic of domestic and foreign research. Experimental research is one of the most basic means to reveal the mechanism of rock bu...

AI Technical Summary

Problems solved by technology

Due to the fixed loading stiffness of the existing testing machine, which is not exactly the same as the actual loading conditions of the field engineering, the obtained test results are quite different from the actual coal mass of the field engineering, and it is impossible to carry out the deformation and failure of the specimen and the energy evolution law under different loading stiffness conditions. Therefore, it is impossible to reveal the mechanism of coal-rock mass dynamic disasters induced by the energy released by different types of roof and floor plates

Therefore, the existing rock mechanics testing machine has great limitations

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