A dynamic and static load superimposed rock mechanics testing machine and test method

Abstract

Disclosed are a rock mechanics testing machine combining dynamic and static loads, and a testing method, which relate 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 (1), upright columns (2), a loading oil cylinder (3), a bearing column (5) and a cross beam (6); and the dynamic loading device comprises energy storage springs (7), telescopic columns (8), energy storage control oil cylinders (9), electromagnets (10), lifting oil cylinders (11) and protective base plates (12); the upright columns (2) are provided at two sides of a lower part of the top beam (1); the loading oil cylinder (3) is provided on a base (4); the telescopic columns (8) and the energy storage control oil cylinders (9) are provided between the top beam (1) and the cross beam (6); the energy storage springs (7) sheathe the telescopic columns (8); the electromagnets (10) are provided on a lower end of the energy storage control oil cylinders (9); the lifting oil cylinders (11) and the protective base plates (12) are provided between the cross beam (6) and each of the upright columns (2); and an energy storage load sensor (14) is provided between the telescopic column (8) and the top beam (1). A method for using the testing machine to study impact failure of a rock specimen is further disclosed, and a testing objective of synchronous static and dynamic loading on the same rock specimen is realized, and advantages, such as flexible and convenient control, are further achieved.

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...

AI Technical Summary

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.

Images