山阳烟家沟滑坡成因机制与运动特征研究

陕西省山阳县烟家沟滑坡现场调查和分析表明:该滑坡属于顺层岩体结构与沟谷地形组合的岩质滑坡。滑坡的发生机制为不利的坡体结构在长期重力作用和人为因素影响下，沿硅质岩层面发生滑移-拉裂-剪断滑动；滑坡发生后受沟谷作用，两次改变运动路径，经历了整体滑动、碰撞解体、加速运动、二次碰撞和减速堆积的运动过程。这类滑坡特征表现为顺层岩体结构决定了滑坡的发生机制，沟谷地形控制着滑坡的运动特征。

Study on Formation Mechanism and Motion Characteristics of Yanjiagou Landslide in Shanyang

The field investigation and analysis of landslide happened in Yanjiagou, Shanyang County, Shanxi Province, showed that the landslide was rock landslide, the combination of bedding rock structure and valley terrain. The formation mechanism of landslide is that, under long term action of gravity and artificial factors, the unfavorable slope structure is failure by sliding-cracking-shearing along siliceous rock stratum, then due to valley terrain, it changes its path twice and experiences the processes of whole slip, collision breakup, acceleration, secondary collision and slow accumulation. Such landslide is characterized by both the formation mechanism thereof determined by bedding rock structure and the motion characteristics thereof controlled by valley terrain.