Dynamic and static load superposition rock mechanics testing machine and testing method

Abstract

The invention provides a dynamic and static load superposition rock mechanics testing machine and testing method, and relates to the technical field of rock mechanics testing. The testing machine comprises a static loading device, a dynamic loading device and a monitoring system, wherein the static loading device comprises a top beam, stand columns, a loading oil cylinder, a bearing column and a cross beam, and the dynamic loading device comprises an energy storage spring, a telescopic column, an energy storage control oil cylinder, an electromagnet, a lifting oil cylinder and a protective subplate; the stand columns are arranged on the two sides of the lower part of the top beam, the loading oil cylinder is arranged on a base, the telescopic column and the energy storage control oil cylinder are arranged between the top beam and the cross beam, the energy storage spring sleeves the telescopic column, the electromagnet is arranged at the lower end of the energy storage control oil cylinder, the lifting oil cylinder and the protective subplate are arranged between the cross beam and the stand columns, and an energy storage load sensor is arranged between the telescopic column and the top beam. According to the testing method that the testing machine is used for studying the impact failure of rock specimens, the testing purpose of synchronous static and dynamic loading on the same rock specimen is achieved, and the testing method further has the advantages of flexible and convenient control and the like.

Description

technical field [0001] The invention relates to the technical field of rock mechanics testing, in particular to a rock mechanics testing machine with superimposed dynamic and static loads and a testing method using the testing machine. Background technique [0002] Rock burst is a dynamic phenomenon of severe damage caused by the instantaneous release of deformation energy stored in mine shafts and coal bodies around stopes. It is one of the typical dynamic disasters in mining, which seriously restricts the safe and efficient production of mines. , and its production environment, place of occurrence, and manifestations are even more varied. Aiming at the induced mechanism of rock burst, scholars at home and abroad have put forward various theories. Among them, the dynamic and static load superposition induction mechanism believes that rock burst is the result of the joint action of internal static load and external dynamic load of coal rock mass. When the static load in coal...

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Problems solved by technology

[0004] The above testing machine is only used for static loading or dynamic load impact test, but the theory of dynamic and static load superposition induced rock burst needs to study the mechanical properties of rock under the superposition of dynamic and static load, so it is necessary to combine the functions of static load application and dynamic load energy impact Combined with indoor experiments, the mechanism of rock impact damage can be revealed more deeply.

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