An indoor experimental method for complex dynamic disturbance rockburst and its implementing device

Abstract

The invention discloses a complex power disturbed rockburst indoor experimental method and an implementation device thereof. The implementation device comprises an impact bullet launcher, an incident rod, a transmission rod, a front confining pressure chamber and a back confining pressure chamber which are communicated with each other, and a data acquisition and processing system; the back end of the incident rod is arranged in the front confining pressure chamber, and the front end penetrates through a front chamber body of the front confining pressure chamber, and is arranged oppositely to the impact bullet launcher; the front end of the transmission rod penetrates through a front chamber body of the back confining pressure chamber and a back chamber body of the front confining pressure chamber, protrudes into the front confining pressure chamber, and is arranged oppositely to the back end of the incident rod so as to form a clamper used for clamping rock samples; the back end of the transmission rod is arranged in the back confining pressure chamber; the incident rod and the transmission rod are provided with stress sheets; and the stress sheets and the data acquisition and processing system are connected via signal connection. According to the complex power disturbed rockburst indoor experimental method, an impact bullet is fired by the impact bullet launcher to impact a wave shaping sheet arranged on the front end of the incident rod; compression-shear complex disturbance on rock samples under confining pressure in the confining pressure chambers is caused by the shaped incident stress wave. The complex power disturbed rockburst indoor experimental method and the implementation device are capable of realizing simulation of rock loading characteristics induced by deep underground engineering rockburst with more accuracy.

Description

technical field [0001] The invention relates to an experimental method and an implementing device for indoor simulating rockburst of deep underground rocks under dynamic disturbance, and belongs to the field of rock mechanics experiments. technical background [0002] In many engineering fields such as hydropower, civil engineering, transportation, etc., many major rock projects are constructed under the environment of high underground stress, and high-intensity rockburst dynamic disasters occur frequently, causing great losses to people's lives and property (He Manchao, Xie Heping, Peng Suping, et al. .Research on Rock Mass Mechanics in Deep Mining[J].Journal of Rock Mechanics and Engineering, 2005,24(16):2803-2813). In order to realize the prediction, early warning and protection of rockburst disasters, it is first necessary to understand the mechanism of rockburst breeding and occurrence. The physical simulation experiment of rockburst in the laboratory is an extremely i...

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Problems solved by technology

[0003] In view of the fact that the existing dynamic disturbance rockburst experiment methods and devices cannot accurately simulate the mechanical characteristics of rocks and do not consider the lack of complex dynamic disturbances, the present invention aims to provide a method for simulating the occurrence of high ground stress environments in rocks during the occurrence of deep underground engineering rockburst disasters , can more accurately simulate the mechanical characteristics of rock bursts in deep underground engineering and the triggering effect of complex dynamic disturbances on rockbursts, and a new method and implementation device for rockburst experiments under complex dynamic disturbances that are more in line with actual working conditions

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