RESEARCH ON MEASUREMENT METHOD FOR STRESS OF ROCK EXCAVATION SURFACE UNDER EXTRA-HIGH STRESS
AI Kai,YIN Jianmin,LIU Yuankun,LI Yongsong,WANG Jie
(Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Yangtze River Scientific Research Institute,Wuhan,Hubei 430010,China)
Abstract:For the limitations of current in-situ stress measuring methods when they are carried out in high in-situ stress conditions( >0.5),a new goestress measurement method called based on partly restoration slot relief method is proposed to measure in-situ surrounding rock stress in high stress condition,and its feasibility is illustrated by theoretical model. This new method was applied at an experimental tunnel in Jinping II hydropower station,China;and the measured maximum stress is 80 MPa. When the test is carried out,it is not need to obtain intact rock core,meanwhile,the instruments of extra-high pressure is not requried. The device of this method is light weight,the operation is easy and quickly. It can be used to measure in-situ rock stress in high stress condition. it provides measured stress for prevention of the cavern rockburst and slope treatment.
艾 凯,尹健民,刘元坤,李永松,汪 洁. 极高应力条件下岩体开挖面应力测量方法研究[J]. 岩石力学与工程学报, 2012, 31(s2): 3974-3980.
AI Kai,YIN Jianmin,LIU Yuankun,LI Yongsong,WANG Jie . RESEARCH ON MEASUREMENT METHOD FOR STRESS OF ROCK EXCAVATION SURFACE UNDER EXTRA-HIGH STRESS. , 2012, 31(s2): 3974-3980.
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