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基于高压水射流凿岩试验结果、岩石内孔隙流体的运动规律以及水射流凿岩过程中能量分布变化趋势的分析,对高压水射流凿岩过程进行了系统的研究。研究结果表明,在水射流凿岩过程中射流和岩石的相互作用以界面耦合为主,水射流的冲击载荷在岩石内产生的应力波和射流准静态压力的共同作用使得岩石破碎,其中应力波的作用占主导地位。高压水射流凿岩过程可分为两个阶段,初期以应力波作用为主,形成岩石损伤破坏的主体;后期主要是射流的准静态压力使得岩石内已有的微孔隙、微裂纹等损伤继续扩展,并汇聚形成宏观破坏,从而使岩石孔眼的直径扩大。
Based on the results of high-pressure water jet rock drilling test, the movement of pore fluid in rock and the trend of energy distribution during water jet rock drilling, the process of high-pressure water jet rock drilling was systematically studied. The results show that the interaction between jet and rock is mainly interfacial coupling in the process of water jet rock drilling. The impact of water jet impact load in the rock and the quasi-static pressure of jet make the rock broken, in which the stress wave The role of dominant. High-pressure water jet rock drilling process can be divided into two stages, the initial stress wave mainly to form the main body of rock damage and destruction; the latter is mainly the jet quasi-static pressure so that the existing rock micro-pores, micro-cracks and other injuries continue Expand, and converge to form macroscopic damage, so that the diameter of the rock hole to expand.