陈家湾尾矿库不稳定边坡变形特征及滑动机制分析

Analysis of Deformation Characteristics and Sliding Mechanism of Unstable Slope of Chenjiawan Tailings Dam

以陈家湾尾矿库不稳定边坡为例,在研究区地质勘查资料的基础上,通过实地踏勘和室内分析相结合的方法,对不稳定边坡的变形特征进行阐述,并分析其成因机制.陈家湾尾矿库不稳定边坡的形成和发展是多种因素的共同结果:不利的地形地貌条件、斜顺向坡理结构,发育的节理裂隙、连续强降雨、人类工程活动在边坡前缘切脚形成临空面等构成了不稳定边坡变形的主要因素.按照物质成分划分,陈家湾尾矿库不稳定边坡属土石混合体边坡;从边坡的动力来源来看,陈家湾尾矿库不稳定边坡属于"推移式".对于陈家湾尾矿库不稳定边坡的变形特征及滑动机制的分析,将对同地区其他类似的边坡勘察、预警工程具有一定的借鉴意义.

Taking the unstable slope of Chenjiawan Tailings Dam for example,and based on the geological survey data in the study area,the deformation characteristics of unstable slope are expounded,and its cause mechanism is analyzed by combining method of field exploring and laboratory analysis.Its formation and development were the result of the coincidence of many factors：unfavorable topographic and geomorphologic conditions,oblique and side slope structure,developed joint cracks,continuous heavy rainfall and human engineering activities formed the cutting faces on the leading edge of the slope.According to the material composition,the unstable slope of Chenjiawan Tailings Dam is a mixed rock and soil slope.While from the power source of the slope,it belongs to＂pushing type＂.The analytical results provide some reference to other similar slope investigation and warning projects in the same area.