DISCUSSION ON DYNAMIC MECHANISM OF ROCKBURST AND ADVANCE STRESS RELEASE METHOD IN ROCKBURST PREVENTION
Through analyzing the stress state of surround rocks, the spatial distribution of rockbust, the stability of tunnel wall and the relationship between rockburst and section area, the static load theory is not appropriate for investigating rockbust. To the underground projects excavated with the drilling and blasting method, the vibration damage induced by blast loading and high in-situ stress transient unloading is the key factor in gestation stage of rockburst. In this paper, the vibration of surrounding rock under different dynamic loads is studied by finite element method. It is found that the prevention mechanism of rockburst by advance stress release can be considered as the result of releasing high in-situ stress in steps, which reducing the vibration damage of surrounding rocks and restraining the gestation of rockburst to the maximal degree.
QI-HU ZHU WEN-BO LU YI LUO MING CHEN
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University Wuhan, 430072, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
473-482
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）