摘要
岩爆是地下工程中常遇的一种地质灾害。本文以天生桥二级引水发电隧洞中的岩爆为例,对岩爆研究中的几个问题提出了一些认识。文章讨论了岩爆灾害发生的基本规律,介绍了岩爆预测的若干方法及岩爆防治方法。
As one of the geological hazards, rockburst is often met in undergronud engineering.The law of occurring rockburst is said as follows; A)lithologic character, rockburst mainly occur on brittle rocks, such as granite ,Iimeston, dolomite. B)position, rockburst often occcur at the position where is 1~1. 5 times diameter of tunnel to mineface. c) time, rockburst can occur within few hours or days, but even after one month.Forecasting rockburst is difficult . There are some methods have been applied in rockburst forecasting to Tianshengqiao tunnel and other underground engineerings. They are: geome-chanic macroscopic analysing; rock strength and stress connected analysing; rock strain energy analysing; disk-like rock core analysing; rockburst critical depth analysing. All of these methods are effective.The rockburst controling method can be divided to the stress control and the strain con-tol. The latter is applied more often and is effective.
出处
《中国地质灾害与防治学报》
CSCD
1992年第4期50-55,共6页
The Chinese Journal of Geological Hazard and Control
关键词
岩爆
地应力
岩爆烈度
岩爆临界深度
饼状岩心
rockburst, crustal stress,rockburst intensity, rockburst critical depth, disk -like rock core
