This paper experimentally explores the frictional sliding behavior of two simulated gouges: one, a series of quartz–smectite mixtures, and the other, powdered natural rocks, aiming to evaluate and codify the effect of mineralogy on gouge dilation and frictional strength, stability, and healing. Specifically, velocity-stepping and slide-hold-slide experiments were performed in a double direct shear configuration to analyze frictional constitutive parameters at room temperature, under normal stresses of 10, 20, and 40 ​MPa. Gouge dilation was measured based on the applied step-wise changes in shear velocity. The frictional response of the quartz–smectite mixtures and powdered natural rocks are affected by their phyllosilicate content. Frictional strength and healing rates decrease with increasing phyllosilicate content, and at 20 ​wt.% a transition from velocity-weakening to velocity-strengthening behavior was noted. For both suites of gouges, dilation is positively correlated with frictional strength and healing rates, and negatively correlated with frictional stability. Changes in the permeability of gouge-filled faults were estimated from changes in mean porosity, indexed through measured magnitudes of gouge dilation. This combined analysis implies that the reactivation of caprock faults filled with phyllosilicate-rich gouges may have a strong influence on permeability evolution in caprock faults.

本文通过实验探索了两种模拟凿子的摩擦滑动行为：一种是一系列石英-蒙脱石混合物，另一种是粉状天然岩石，旨在评估和整理矿物学对凿子膨胀以及摩擦强度，稳定性和稳定性的影响。康复。具体来说，在双直接剪切配置下进行了速度步进和滑移-保持-滑移实验，以分析室温，10、20和40 MPa的正应力下的摩擦本构参数。根据所施加的剪切速度的逐步变化来测量气刨膨胀。石英-蒙脱石混合物和粉末状天然岩石的摩擦响应受其页硅酸盐含量的影响。摩擦强度和愈合速度随着层状硅酸盐含量的增加而降低，并且在20 wt时。注意到从速度减弱行为向速度增强行为的转变。对于这两套凿子来说，扩张与摩擦强度和愈合率正相关，而与摩擦稳定性负相关。根据平均孔隙度的变化，可以估算出充满圆孔的断层的渗透率的变化，并通过测量的圆孔的扩张幅度来进行索引。这种综合分析表明，充满富含层状硅酸盐的泥屑的盖层断层的再活化可能对盖层断层的渗透率演化有很大的影响。根据平均孔隙度的变化，可以估算出充满圆孔的断层的渗透率的变化，并通过测量的圆孔的扩张幅度来进行索引。这项综合分析表明，充满富含层状硅酸盐泥质的盖层断层的再活化可能对盖层断层的渗透率演化有很大影响。根据平均孔隙度的变化，可以估算出充满圆孔的断层的渗透率的变化，并通过测量的圆孔的扩张幅度来进行索引。这项综合分析表明，充满富含层状硅酸盐泥质的盖层断层的再活化可能对盖层断层的渗透率演化有很大影响。