Abstract：Understanding the evolution of shear displacement，fault thickness and friction coefficient of stick-slip cycle is of great importance to understand the whole seismic cycle. In this research，spherical soda-lime glass beads are used to investigate the stick-slip behavior of simulated fault gouge under double direct shearing. The results show that in each stick-slip event，the faults will first experience a stage of elastic loading，then transfer to inelastic loading. Finally，failure happens when the friction coefficient reaches a critical value. Velocity steps from 3 to 300 ?m/s were used in a single double shear experiment. Our data show that the rate and state friction parameter(A－B) of glass beads faults is around －0.005–－0.006，which means a velocity weakening behavior. Different humidity of 50% and 100% were used to study the humidity influence. Results show that higher humidity leads to larger friction drop and longer recurrence time. For the faults that have switched to stable sliding，experiment results show that water injection will change the sliding mode back to stick-slip motion.
吕 征，杨 强，王守光. 颗粒断层黏滑运动特征及水对其影响的试验研究[J]. 岩石力学与工程学报, 2019, 38(S1): 2636-2645.
LYU Zheng，YANG Qiang，WANG Shouguang. Experimental study on characteristics of stick-slip events and the effect of water on granular fault gouge. , 2019, 38(S1): 2636-2645.
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2019, Vol. 38 
