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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.
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Received: 16 April 2012
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2012, Vol. 31 
