Deep rock mass tends to be broken into blocks when mining for materials deep below the surface. The rock layer of the roof of the mine can be regarded as a system of blocks of fractured rock mass. When subjected to high ground stress and mining-induced disturbance, the effect of the ultra-low friction of the block system easily becomes apparent, and can induce rock burst and other accidents. By taking the block of rock mass as research object, this study developed a test system for ultra-low friction to experimentally examine its effects on the broken blocks under stress wave-induced disturbance. We used the horizontal displacement of the working block as the characteristic parameter reflecting the effect of ultra-low friction, and examine its characteristic laws of horizontal displacement, acceleration, and energy when subjected to the effects of ultra-low friction by changing the frequency and amplitude of the stress wave-induced disturbance. The results show that the frequency of stress wave-induced disturbance is related to the generation of ultra-low friction in the broken block. The frequency of disturbance of the stress wave is within 1–3 Hz, and significantly increases the maximum acceleration and horizontal displacement of the broken blocks. The greater the intensity of the stress wave-induced disturbance is, the higher is the degree of block fragmentation, and the more likely are effects of ultra-low friction to occur between the blocks. The greater the intensity of the horizontal impact load is, the higher is the degree of fragmentation of the rock mass, and the easier it is for the effects of ultra-low friction to occur. Stress wave-induced disturbance and horizontal impact are the main causes of sliding instability of the broken blocks. When the dominant frequency of the kinetic energy of the broken block is within 20 Hz, the effects of ultra-low friction are more likely.

在挖掘地表以下深处的材料时，深层岩体往往会破碎成块。矿山顶板的岩层可以看作是破碎岩体的块体系统。当受到高地应力和采动扰动时，块体系统的超低摩擦效应容易显现，容易诱发岩爆等事故。本研究以岩体块体为研究对象，研制了超低摩擦力试验系统，通过试验验证其对应力波扰动下破碎块体的影响。我们以工作块的水平位移作为反映超低摩擦效应的特征参数，考察了其水平位移、加速度、通过改变应力波引起的扰动的频率和幅度，在受到超低摩擦影响时的能量和能量。结果表明，应力波扰动的频率与破碎块中超低摩擦力的产生有关。应力波的扰动频率在1~3 Hz范围内，显着增加了破碎块的最大加速度和水平位移。应力波扰动强度越大，块体破碎程度越高，块体间越容易产生超低摩擦效应。水平冲击载荷强度越大，岩体破碎程度越高，越容易产生超低摩擦效应。应力波扰动和水平冲击是破碎块体滑动失稳的主要原因。当破碎块动能的主频在20Hz以内时，超低摩擦效应的可能性更大。