EXPERIMENTAL STUDY AND DETECTION ANALYSIS OF MECHANICAL PROPERTIES VARIABILITY OF ROCK MASS IN EXCAVATION DISTURBANCE
JI Hongguang1，2，XIANG Peng1，ZHANG Lei1，2，HAN Fang3，YANG Zhanjun3
(1. School of Civil and Environment Engineering，University of Science and Technology Beijing，Beijing 100083，China；2. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing，Beijing 100083，China；3. Fushun Mining Group Limited Company，Fushun，Liaoning 113008，China)
Abstract：The change of resistivity of rock during its damage process is studied by uniaxial cyclic loading and unloading test. The variation rules of rock resistivity，elastic modulus and compression strength in the damage process is found out that it accords logarithmic mathematical model. So the rock damage variable can be expressed in resistivity change. The results of marble triaxial compression test show that the relationship between rock elastic modulus and shear strength accords logarithmic mathematical model；and the difference of the whole variation law is not obvious. According to the research results mentioned above，the empirical equation regarding resistivity，elastic modulus，compression strength and shear strength is established；and the variability of mechanical properties of rock mass can be expressed with resistivity change. At last，the mechanical parameters of disturbed rock mass are estimated according to apparent resistivity change of Donglutian open pit layer in Fushun got by in-situ detection，which provide basic evidence of selecting mechanical parameters for further analysis of the slope stability.
杨 泽，侯克鹏，李克刚，等. 云锡大屯锡矿岩体力学参数的确定[J]. 岩土力学，2010，31(6)：1 923-1 928.(YANG Ze，HOU Kepeng，LI Kegang，et al. Determination of mechanical parameters of rock mass from Yunxi Datun Tin Mine[J]. Rock and Soil Mechanics，2010，31(6)：1 923-1 928.(in Chinese))
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2011, Vol. 30 
