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Stability evaluation indexes in optimization design of filling mining

YU Wei-jian1,2,GAO Qian3 (1.Hunan Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology,Xiangtan 411201,China; 2.School of Energy and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China; 3.School of Civil & Environment Engineering,University of Science and Technology Beijing,Beijing 100083,China)  
According to multivariate and nonlinear characteristics of rock mass,four indexes of energy releasing rate(RER),surface displacement rate(RSD),displacement convergence rate(RDC) and averaging failure ratio(RAF) were put forward and defined.Aiming at Jinchuan Mine,twenty-seven projects of thirteen factors and three parameter levels were selected,and the software of FLAC2D was used to make optimization design and numerically analyze.Average values,ranges and impact factors of RER,RSD,RDC and RAF were respectively given.The optimum project and the worst project were chosen through the four indexes,and impact factors of the stability of these projects action to stope were analyzed.The results show that although the optimum projects and the worst projects chose are not completely the same while using different evaluation indexes,main control influencing factors are basically identical.It has important engineering significance,when the four indexes are applied to optimization design and comprehensive evaluation on filling stope,and they play a very important role in the optimization application research of stope.
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