Rock failure mechanisms in the surrounding rock masses with deep level tunnels and in the source areas of disastrous events
Qian Qihu
QIAN QIHU, College of National Defense Engineering, PLA University of Science and Technology; State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, PR China, e-mail: gcyqqh@163.com
Definition, mechanism, classification and quantitative prediction model for rockburst and pressure bump
In this paper, the definitions and mechanisms of rockburst proposed by authoritative experts are reviewed. On this basis, rockbursts are divided into the sliding mode resulted from fault slip or shear rupture and the strain mode due to rock failure according to different mechanisms. The mechanism and characteristics of two types of rockburst and pressure bump are analyzed with case studies. The quantitative prediction results for strain burst in rock (coal) pillar, strain burst and fault-slip rockburst in the surrounding rock masses are presented. The latest research achievements on quantitative prediction and numerical simulation of strain burst by considering the effect of the non-compatible deformation using the non-Euclidean geometry model are introduced.
Key words: rockburst mechanism; Fault slip; Strain burst; Quantitative prediction.
