摘要
岩爆是地下岩石开挖中一种工程灾害现象,隧洞的超挖会引起围岩应力的重分布,改变岩石隧洞破坏时的弹性能释放速率及幅值。通过有限元模拟分析了隧洞超挖情况下对岩爆产生的影响,分析结果显示,超挖会对岩爆的产生造成一定的影响;而在应力集中部位的超挖会使岩爆产生的风险大幅度增加。
Rock-burst is one of the disasters which occur in deep mining and rock excavation. The stress of the surrounding rock will be redistributed by the outbreak of tunnel-cavity. The releasing velocity and amplitude of elastic energy will also be modified when the tunnel is destroyed. In this paper, the influence to the rock-burst is simulated by the outbreak of tunnel-cavity. The result indicates that the outbreak of tunnel-cavity has definite influence on the generation of rock-burst especially on the stress concentrated area of the surrounding rock.
出处
《土工基础》
2008年第4期53-56,共4页
Soil Engineering and Foundation
关键词
岩爆
有限元
隧洞超挖
rock-burst, finite element, outbreak of tunnel-cavity
