Experimental system and method for studying action mechanism of explosive stress waves of surrounding rock

Abstract

The invention discloses an experimental system and method for studying an action mechanism of explosive stress waves of surrounding rock. The system can change surrounding rock stress, the number of cartridge bags, the positions of the cartridge bags, the explosive charge amount, the explosive hole diameter and the like, and analyze the action mechanism, cracking speed and crack propagation situation of the explosive stress waves on the rock mass by reading strain data of the rock mass around blast holes in the instantaneous blasting process. The system for studying the action mechanism of theexplosive stress waves of the surrounding rock can study the action mechanism on a test piece when the explosive stress waves are generated, the effects of the explosive stress waves during crackingof a crack of the test piece and the effect and rule of superposition of the explosive stress waves under confining pressure of different strengths, and more deeply study the fracture dynamics theoryand stress wave theory on this basis.

Description

technical field [0001] The invention belongs to the field of experimental fracture mechanics research, in particular to an experimental system and method for the fracture mechanism of confining rock mass under the action of explosion stress waves. Background technique [0002] At present, my country's coal mining and tunnel excavation are mainly carried out in the form of blasting, and the surrounding rock stress and rock hardness of coal-rock roadways have become the main factors restricting roadway excavation. Over the past few years, domestic blasting technology has been widely and more widely used, and the blasting forms have become more abundant. Drilling blasting, smooth blasting, and directional fracture control blasting technologies have been widely used in open-pit mines and deep mines, road construction, tunnels, and vertical shafts. Has a wide range of applications. However, the specific process of blasting rocks under confining pressure has not been fully clarif...

AI Technical Summary

Problems solved by technology

However, there are many cracks inside the natural rock mass and the inhomogeneous characteristics of the rock mass. At the same time, due to the existence of surrounding rock stress, it is difficult to control the path from the crack initiation to the penetration of the surrounding pressure rock mass after the detonation of some blastholes. However, at present There are relatively few experiments and studies on the explosion stress wave action of confining rock mass

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