中文摘要：

为研究岩石界面动态摩擦性能，对房山花岗岩进行了冲击速度42.2~130.6 m/s、倾斜角为20°和30°的横剖试样斜撞击实验。倾斜角为20°的为对比实验，研究不发生滑动时的界面性能；在倾斜角为30°的实验中，靶和飞片撞击界面发生相对滑动，用于研究发生界面滑动时的动态摩擦性能。基于此，研究了正应力在317~685 MPa、界面相对滑移速度在2.76~24.88 m/s时花岗岩界面滑动态摩擦状态。其结果可以初步揭示地震过程板块动态摩擦过程摩擦强度急剧降低的现象。

英文摘要：

To investigate the dynamic friction behaviors of rock interface, series of experiments including oblique planar impact with inclination angle 20° and 30°, impact loading velocity ranging from 42.2 m/s to 130.6 m/s for Fangshan granite, are carried out. Experiments with inclination angle 20° were carried out to study interfacial properties for specimen without interfacial sliding, and those with inclination angle 30° were used to study the dynamic friction behaviors for specimens with interfacial sliding. Experimental results preliminarily revealed the dynamic friction behaviors of granite surface under the pressures range from 317 MPa to 685 MPa and the surface sliding velocities range from 2.76 m/s to 24.88 m/s. The preliminary results indicated a complicated process of the dynamic friction, which is helpful for the understanding of the earthquake slip.