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岩石碎屑流在运移停积过程中,对运移路径存在强烈的刮铲效应。首先分析总结了碎屑流基底刮铲效应的特征,然后采用二维颗粒离散元模拟方法模拟岩石碎屑流水平基底上刮铲。模拟试验证明了基底刮铲效应可以增强岩石碎屑流在水平面上的运移停积能力。通过进一步研究水平基底物理力学性质和分层情况对刮铲效应和岩石碎屑流运移过程的影响,证明了减小基底物质的强度会增强刮铲效应,但基底表层松散堆积物质低密度、低强度的特点才是影响岩石碎屑流最大运移堆积距离的关键因素,并具有类似润滑剂的特性;相对地,基底底层高强度、高密度物质的强度变化对最大运移距离影响很小。
Rock debris flow in the process of migration and de-deposition, there is a strong scraper effect on the migration path. Firstly, the characteristics of debris scraping effect of debris flow base were analyzed and summarized. Then the two-dimensional particle dispersive element simulation method was used to simulate the scraper shovel on the horizontal base of rock debris flow. Simulation tests show that the substrate scraping effect can enhance the ability of rock debris flow to move in the horizontal plane. By further studying the influence of horizontal substrate physical and mechanical properties and stratification on the scraper effect and the flow of rock debris flow, it is proved that reducing the intensity of substrate material will enhance the scraper effect, but the loose accumulation of substrate surface material has low density, Low-intensity characteristics are the key factors influencing the maximum migration distance of rock debris flow and have the similar characteristics of lubricants. On the contrary, the change of intensity of high-strength and high-density materials in the substrate has little effect on the maximum migration distance .