Study on Blast-induced Cumulative Damage of Tunnel Surrounding Rock and Its Application in Determining Allowed Safety Distance
The seismic wave derived from multiple blasts in a longspan tunnel will in all probability induce cumulative damage of surrounding rock, and affects surrounding rocks stability and even cause wall rock to collapse. In this study, international advanced apparatus, Blastmate III, was applied to monitor surrounding rocks response to blast vibration. Blast vibration signals are analyzed both in time and frequency using Hilbert-Huang Transform (HHT) method, which has excellent ability in time-frequency analysis of non-stationary random signals. The nonlinear characteristics of surrounding rocks cumulative damage are also analyzed using this method. The study uses UTEP to indicate the evolutionary process of cumulative damage in surrounding rock. The author puts forward a new thinking to determine the allowed safety distance by cumulative damage. This study is instructive and meaningful to wall rock supporting and reducing blast vibration in longspan tunnel.
MA Haipeng ZHOU Mingan LI Lifeng
School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China College of Basic Education for Commanding Officers, National University cf Defense Technology, Chang
国际会议
厦门
英文
388-391
2011-08-10（万方平台首次上网日期，不代表论文的发表时间）