Fig. 2

Figure 2. (b) typical friction coefficient versus slip displacement curve under 30.0 MPa normal stress, and (c) friction rate parameter (a-b) as a function of the ratio of fluid pressure to normal stress.图2 (b)为30.0 MPa法向应力条件下典型的摩擦系数-滑移位移曲线，(c)为摩擦速率参数(a-b)随流体压力与法向应力之比的变化关系。