【摘 要】
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Water-rock flow is a kind of debris flow with more coarse particles and low viscosity,which occurs in many areas of the world.In this work,the water-rock flow that occurred on May 24,2010,at Nanfen\'s open-pit mine of China was investigated by combining
【机 构】
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State Key Laboratory for Deep Geomechanics and Underground Engineering,China University of Mining an
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Water-rock flow is a kind of debris flow with more coarse particles and low viscosity,which occurs in many areas of the world.In this work,the water-rock flow that occurred on May 24,2010,at Nanfen\'s open-pit mine of China was investigated by combining field investigation,meteorological and hydrological survey with numerical simulation to understand its triggering mechanism and dynamic process.The field data shows that the short-term high-intensity rainfall is the most direct inducement to trigger water-rock flow in the waste dump.The loose shallow gravel soil and the V-shaped valley with a certain slope provide the necessary conditions of the occurrence of water-rock flow in the waste dump.Moreover,the possibility criterion of water-rock flow is presented by analyzing the historical rainfall data.In addition,the smoothed particle hydrodynamics(SPH)method was employed to simulate the water-rock flow under the conditions of Newtonian fluid with uniform distribution of water and coarse-grained materials.The simulating results show that the flow distance,velocity,shape,and deposition profile of water-rock flow are in good agreement with the field observation.The present work is beneficial to the risk assessment and mitigation design of water-rock flow disaster in the waste dump.
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