Research on the Influence of Rock Mass Strength and Friction Coefficient to the Rock Landslide and Surge Process
The surge caused by rock mass instability and landslide in reservoir area will poses a great threat to the safety of hydraulic struc-tures and downstream.The rock landslide mass may fracture and break during the landslide process,affecting the subsequent surge disaster process.The strength and friction coefficient of rock mass are the important factors that affect the fracture and fragmentation of rock mass.Through the three-dimensional numerical experiment of landslide surge,the whole process of landslide surge under different rock mass strength and friction coefficient conditions was simulated,and the motion characteristics and surge characteristics of landslide were analyzed.The results show that with the increase of rock mass strength,the degree of landslide fragmentation gradually decreases,the velocity and ki-netic energy gradually increase,and the maximum wave height and maximum climbing height of surge also gradually increase.What's more,the landslide mass with high rock mass strength enters into the channel at a high speed,in an extreme case,it may even impact the rock mass on the opposite bank to cause new landslide disasters.Moreover,the smaller the friction coefficient is,the greater the velocity and ki-netic energy of the landslide mass are,and the greater the maximum wave height and the maximum climbing height are.When the friction co-efficient is very small,the rock mass with low strength may not break during the sliding process along the sliding surface,resulting in a sud-den increase in the maximum wave height and maximum climbing height of the surge.
rock landslidesurgestrength of rockfriction coefficientnumerical experiment
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