Influence Analysis of the Structural Characteristics of Whip-Tip Block on the Ultra-Low Friction Effect

The dynamic response of a deep rock body under mining disturbance is very similar to that of a high-rise building under seismic action, and the whip-tip structure is introduced into the study of the rock body's ultra-low friction effect. The model of the ultra-low friction effect of the whip-tip block is established, and the influence of its structural characteristics on the ultra-low friction effect is studied. The horizontal displacement size of the whipping block by changing the size, position, and aspect ratio of the whipping block was analyzed by using the self-developed experimental device of ultra-low friction effect, and the influence law of the structural characteristic parameters on the ultra-low friction effect was obtained. The results show that: The horizontal displacement time course curves of the whipping tip block under different working conditions are characterized by two stages; The whipping tip block size increases, the horizontal displacement decreases, and the ultra-low friction effect is weakened; Under the effect of vertical perturbation, the ultra-low friction effect of the whip-tip block tends to increase with its position away from the source of perturbation, and there is an interval of significant influence of the ultra-low friction effect on the height-to-width ratio.