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一、引言在地震研究中,自粘滑运动作为地震的一种机制解释以来,地震工作者对岩石摩擦的研究十分重视。根据原地应力测量结果和地应力场的分析,得到断层面上各处的应力状态,就可以用断层滑动准则判断断层的稳定性.J.D.Byerlee根据大量实验室资料分析和M.D.Zoback与J.Healy在野外断层上的验证,认为断层面的摩擦系数μ=0.6～1.0较为合适。断层滑动准则可用τ=(0.6～1.0)σ_n来表示。式中τ是断层滑动的临界剪切应力,σ_n为断层面上的正应力。
I. INTRODUCTION In the study of earthquakes, since the self-adhesive slip movement was interpreted as a mechanism of earthquake, the seismic workers paid much attention to the research of rock friction. According to the results of in-situ stress measurements and the analysis of the in-situ stress field, the stress state can be obtained everywhere on the fault plane, and the fault slip criterion can be used to judge the fault stability.JDByerlee According to a large number of laboratory data analysis and MDZoback and J.Healy In the field of fault verification, that the fault surface friction coefficient μ = 0.6 ~ 1.0 is more appropriate. The fault slip criterion can be expressed as τ = (0.6 ~ 1.0) σ_n. Where τ is the critical shear stress of fault slip and σ_n is the normal stress on fault plane.