Energy Analysis of Intermittent Zonal Fracture of Roadway Wallrock

Abstract

Abstract: That unloading may lead to the tensile stress in rock is demonstrated by true triaxial pressure experiment.The intrinsic mechanism of energy conversion and failure process in the intermittent regional fracture process of rock is discussed.It is pointed out that the rock intermittent regional fracture is a composite result of rock energy dissipation and conservation.Energy dissipation leads to rock damage and lithologic deterioration while energy conversion is the internal cause for rock tensile fracture.The analytical formula for the radius of intermittent zonal fracture process of rock is deduced.

Key words: Rock mechanics, Energy dissipation, Energy conversion, Tensile fracture, Unloading

QU Tao, HAN Li-Jun, WANG De-Liang, ZHENG Tian-Xiang, ZHANG Xian-Yang. Energy Analysis of Intermittent Zonal Fracture of Roadway Wallrock[J]. Metal Mine, 2008, 38(06): 23-26.

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Energy Analysis of Intermittent Zonal Fracture of Roadway Wallrock

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