摘要
本文以正在施工的南盘江天生桥大型水电站引水隧洞中产生岩爆的石灰岩为试件,在电液闭路伺服控制刚性试验机上进行了大量的岩石弹射试验。依据荷载-位移全过程曲线,分析了有效弹射能 W(?)ff 与岩爆岩石脆性指数 K_u、应力下降指数 K(?)以及弹性应变能指数 K_w 之间的关系,提出了岩爆岩石弹射性能综合指数 K_(rb)判据。
This paper deals with the rock mechanical ejection tests of limestone samples on the electro-hydraulic servo-controlled testing machine. The samples were taken from the tunnel, where rockbursts occurred, at the Tianshengqiao Hydropower Station on Nanpanjiang River.According to the whole-load deformation process charts, the relations between the effective ejection energy (Weff) and brittleness index (Ku), and between elastic strain energy index (Kw), and stress drop index (Ka) were analysed. Summarizing the ejection characteristics of the rock, the authors propose a composite index (Krb) criterion for the burstrock.Key words burstrock, brittleness index, stress drop index, elastic strain energy index, composite index of the rock, ejection characteristics
出处
《地质科学》
CAS
CSCD
北大核心
1991年第2期193-200,共8页
Chinese Journal of Geology(Scientia Geologica Sinica)
