Dynamic analysis of granite rockburst based on the PIV technique  

作　　者：Wang Hongjian Liu Da'an Gong Weili Li Liyun 

机构地区：[1]Key Laboratory of Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences [2]School of Mechanics and Civil Engineering,China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2015年第2期275-283,共9页矿业科学技术学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.41172270);National Basic Research Program (No.2011CB201201)

摘　　要：This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a rockburst,the images of tracer particle,displacement and strain fields can be obtained,and the debris trajectory described.According to the observation of on-site tests,the dynamic rockburst is actually a gas–solid high speed flow process,which is caused by the interaction of rock fragments and surrounding air.With the help of analysis on high speed video and PIV images,the granite rockburst failure process is composed of six stages of platey fragment spalling and debris ejection.Meanwhile,the elastic energy for these six stages has been calculated to study the energy variation.The results indicate that the rockburst process can be summarized as:an initiating stage,intensive developing stage and gradual decay stage.This research will be helpful for our further understanding of the rockburst mechanism.This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rock- burst process. Based on the PIV （Particle Image Velocimetry） technique, quantitative analysis of a rock- burst, the images of tracer particle, displacement and strain fields can be obtained, and the debris trajectory described. According to the observation of on-site tests, the dynamic rockburst is actually a gas-solid high speed flow process, which is caused by the interaction of rock fragments and surrounding air. With the help of analysis on high speed video and PIV images, the granite rockburst failure process is composed of six stages of platey fragment spalling and debris ejection. Meanwhile, the elastic energy for these six stages has been calculated to study the energy variation. The results indicate that the rockburst process can be summarized as： an initiating stage, intensive developing stage and gradual decay stage. This research will be helpful for our further understanding of the rockburst mechanism.

关 键 词：Rock mechanics Instantaneous rockburst Particle image velocimetry Energy variation 

分 类 号：TU45[建筑科学—岩土工程]