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由于渗流引起的动力灾害多发生在破碎岩体中,因此研究破碎岩体的渗流特性是非常必要的。利用MTS815.02岩石力学试验系统及破碎岩石渗透仪,采用稳态渗透法和轴向位移控制法测定了混合粒径的煤、煤矸石及灰岩在承压过程中非Darcy流的渗透特性,得到了渗透特性随孔隙率的变化规律。研究结果表明:混合粒径破碎岩体中的渗流为非达西渗流,混合粒径岩石在压实过程中随孔隙率φ的减小渗透率k逐渐减小、非达西流β因子变大,渗透率的量级为10-14～10-13 m2,而非达西流β因子的量级为1010～1011m-1,该研究可为解决破碎岩石渗流的工程问题提供一定的参考。
Due to seepage flow caused by dynamic disasters occur in the rock mass, so it is necessary to study the seepage characteristics of the rock mass. By using MTS815.02 rock mechanics test system and broken rock permeability tester, the infiltration characteristics of non-Darcy flow during the pressure bearing process of coal, gangue and limestone with mixed size were measured by steady infiltration method and axial displacement control method. The infiltration characteristics with porosity were obtained. The results show that the seepage in the mixed-size rock mass is non-Darcy flow, the rock with mixed size decreases gradually with the decrease of the porosity φ, and the β factor of non-Darcy flow becomes larger , The permeability is on the order of 10-14 ~ 10-13 m2, while the non-Darcy flow β factor is on the order of 1010 ~ 1011m-1. This study can provide some reference for solving the engineering problems of seepage in fractured rock.