Title: Initiative control of rock-burst under excavating based on the dynamic mechanism
Abstract: Adopting the Laplace transform method,the dynamic stress stimulated by in-situ stress transient unloading in hydro-static stress field was calculated,and the characters of the vibration of surrounding rock caused by dynamic unloading of in-situ stress were studied and compared with that of the vibration induced by blasting load.The results indicate that In-situ Stress Dynamic Unloading Disturbance(ISDUD) is an important part of Excavation Disturbance(ED),and the ISDUD could exceed the blast load-induced disturbance and become the dominant component of ED under certain level of geo-stress.Based on this conclusion,the idea of initiative control on rock-burst during the excavation process under high geo-stress condition was presented,and the primary practical measures of minimizing the ED and preventing rock-burst were advised,the core of which was optimization of initiation network and procedure.Application of this method in excavation process of underground powerhouse of Ertan and Pubugou projects verified the availability of it.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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