A Review of Research on Catastrophic Formation and Evolutionary Mechanism of Deep High Stress Rock Mass under Impact Loading

Xinfeng Wang,Yipeng Li,Wenbo Luo

doi:10.4236/ojce.2018.84031

Abstract

With the exploitation of resources expanded to deep, the geological environment which is “three tenors one disturbance” of rock mass in great depth has been more complex, resulting in some new engineering geological disasters, such as rock burst, pressure bumping, large deformation of surrounding rock, brittle-ductile transition of rock and zonal disintegration of rock mass, which occur frequently in deep underground engineering rock mass. The impact load caused by collision, explosion, extrusion and outburst is the root cause of the dynamic instability of the deep rock mass. What should be emphasized is that high in-situ stress and blasting excavation disturbance complicate disaster developing mechanism of deep underground engineering rock mass and sharply increase the difficulty of controlling disaster. This paper is aimed at the research status and development trend, of which dynamic characteristics of deep high stress rock mass and its damage and failure effect each other under impact, and conduct analysis, in the later stage where I would discuss how to carry out the response law of the deep high-stress rock mass under the impact load and the mechanism of catastrophe developing, which is of great significance to build a model of instability and fracture evolution about deep rock mass under shock disturbance and to maintain its safety and stability.

Highlights

With the rapid development of industrialization, the national economic development has increased the dependence for resources and energy
With the exploitation of resources expanded to deep, the geological environment which is “three tenors one disturbance” of rock mass in great depth has been more complex, resulting in some new engineering geological disasters, such as rock burst, pressure bumping, large deformation of surrounding rock, brittle-ductile transition of rock and zonal disintegration of rock mass, which occur frequently in deep underground engineering rock mass
The impact load caused by collision, explosion, extrusion and outburst is the root cause of the dynamic instability of the deep rock mass

Summary

Introduction

With the rapid development of industrialization, the national economic development has increased the dependence for resources and energy. Since the rock mass deep excavated is in the complex geological environment of high crustal stress, high earth temperature, high karst water pressure and strong mechanical excavation, blasting vibration, impact unloading and mining disturbance, which is under the threats of severe dynamic phenomena as a state of “three tenors one disturbance”, and it make its mechanical response of deep rock mass obviously distinct from that of the shallow rock mass. During the excavation of deep rock mass, the engineering disaster problems are emerging; there are some new engineering geological disasters, such as rock burst, impulse earth pressure, large deformation of surrounding rock, brittle transition of rock and zonal disintegration of rock mass in deep underground engineering rock. For similar to the deep excavation, if we apply the shallow solution, the effect is not ideal; the mechanics of deep rock response characteristics and catastrophe evolution behavior are the most difficult and focus of the study for rock mechanics circle

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Conclusion