Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations,especially on the steep rock slope. In this paper,using the discrete element m...Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations,especially on the steep rock slope. In this paper,using the discrete element method(UDEC),numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city,China. Mechanical parameters of the rock mass have been determined by situ measurements and laboratory measurements. A preliminary site monitoring system has been realized,aiming at getting structure movements and stresses of unstablerock masses at the most significant discontinuities. According to the numerical model calibrated based on the monitoring data,four types of operation conditions are designed to reveal the effect of mining excavation and extreme rainfall on the deformation of the steep rock slope.展开更多
In accordance with the principle of similarity in geology and topography,the V3S0(the average shear-velocity down to a 30m depth below the surface) approximation of sites is acquired by correlation between V3S0 and sl...In accordance with the principle of similarity in geology and topography,the V3S0(the average shear-velocity down to a 30m depth below the surface) approximation of sites is acquired by correlation between V3S0 and slopes after calculating the maximum slope of topography using the 30-sec Chinese Mainland DEM(Digital Elevation Model) data set.Site-amplification factors are then quantified with V3S0 and applied to the ShakeMap system developed by this study to revise ground-motion amplitudes on bedrock estimated from empirical relationships.Finally,the distribution of ground motion parameters on the surface is obtained.This article also introduces the calculation process,calculation models of the ShakeMap systems and related software systems.In conclusion,certain examples indicate that the ShakeMap system is feasible in the Chinese Mainland.展开更多
基金financially supported by a grant from China Natural Science foundation (51379112,51422904)the National Program on Key Basic Research Project of China (973 Program)(2013CB036002)the National Natural Science Foundation of China (51309144)
文摘Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations,especially on the steep rock slope. In this paper,using the discrete element method(UDEC),numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city,China. Mechanical parameters of the rock mass have been determined by situ measurements and laboratory measurements. A preliminary site monitoring system has been realized,aiming at getting structure movements and stresses of unstablerock masses at the most significant discontinuities. According to the numerical model calibrated based on the monitoring data,four types of operation conditions are designed to reveal the effect of mining excavation and extreme rainfall on the deformation of the steep rock slope.
基金sponsored by the Basic Scientific Research Business Special,Institute of Geophysics,China Earthquake Administration (BQJB08B24)
文摘In accordance with the principle of similarity in geology and topography,the V3S0(the average shear-velocity down to a 30m depth below the surface) approximation of sites is acquired by correlation between V3S0 and slopes after calculating the maximum slope of topography using the 30-sec Chinese Mainland DEM(Digital Elevation Model) data set.Site-amplification factors are then quantified with V3S0 and applied to the ShakeMap system developed by this study to revise ground-motion amplitudes on bedrock estimated from empirical relationships.Finally,the distribution of ground motion parameters on the surface is obtained.This article also introduces the calculation process,calculation models of the ShakeMap systems and related software systems.In conclusion,certain examples indicate that the ShakeMap system is feasible in the Chinese Mainland.
