Abstract:Taking Jiweishan rockslide in Wulong for example,based on analyzing of geological conditions and mining exploitation,the new failure pattern of inclined thick bedding slope under gravity,karst and mining processing is simulated with the fast Lagrangian analysis of continua in 3-dunebsion(FLAC3D). The results show that the apparent dip slide of inclined thick bedding slope has 5 principal characters:(1) Bedding block-broken body,rock mass is split into obvious distinct blocks with several groups of joints,similar to toy bricks;(2) Incline rock mass support,the sliding rock mass along dip angle is supported by inclined stable rock mass,then sliding direction is changed from dip angle to apparent dip angle;(3) Apparent dip exiting,the valley and cliff provide a free space in the apparent dip exiting;(4) Driving-rock mass sliding,the toy brick rock mass is long-term creeping with the shear strength decreasing from peak to residual value and the sliding force increasing;(5) Key-block resisting,the pressure on the key-block is increasing by driving-rock mass and inner strength is decreasing due to karstlization;the key block is suddenly broken with shear rupture that triggers rockslide. The mining activity of iron-layer 100 m underneath sliding belt induces stress field change and different subsidences between bedding blocks.
殷跃平. 斜倾厚层山体滑坡视向滑动机制研究——以重庆武隆鸡尾山滑坡为例[J]. 岩石力学与工程学报, 2010, 29(02): 217-226.
YIN Yueping. MECHANISM OF APPARENT DIP SLIDE OF INCLINED BEDDING ROCKSLIDE—A CASE STUDY OF JIWEISHAN ROCKSLIDE IN WULONG,CHONGQING. , 2010, 29(02): 217-226.