摘要
从隧道的开挖方式及开挖后洞周应力逐渐调整这一实际状况出发,选取了具有典型代表意义的断面进行数值分析,并预测整个计算范围内岩爆的状况。通过计算分析可知,随着应力释放系数的逐渐加大,岩爆发生的区域及等级不断增加。为有效防止或降低岩爆发生的可能,分析现场的监控量测资料后,确定了本隧道不同地段的最佳支护时机。
According to the excavation style and gradually adjusting of the stress after excavation in the tunnel, some typical sections are chosen to numerically analyze and forecast the status of rockburst in the whole calculational scope. According to the calculational result, some conclusions can be drawn as follows： the larger of the stress releasing coefficient has become, the area and the grade of rockburst would increase. For effectively avoiding or reducing the occurring of rockburst, the most prime support times for the different areas are given by analyzing the measuring data in-situ in this tunnel.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第6期1181-1186,共6页
Rock and Soil Mechanics
关键词
隧道
岩爆预测
数值计算
应力释放系数
支护时机
tunnel
rock burst forecasting
numerical calculation
stress releasing coefficient
support time
