ABSTRACT
Slope is a natural or artificial formation of the slope. It is one of the most basic geological environment of human engineering activities, as well as the most common form of engineering project construction. Its formation and evolution has a very close relationship with the human production and activity. As one of the three global major geological disaster, the failure of slope has a serious crisis to people’s lives and property. With the progress of human society and the development of world economy, human engineering activity is increasingly frequent, its scale is increasing, and it causes more and more geological fracture. The size of its scale and the complexity of its conditions are unprecedented. Therefore, the correct understanding of slope, the rational survey and design, the proper governance, and losses the disaster caused by the instability and failure of slope to a minimum, is the question must consider for the workers of geologists, geotechnical engineering technology. The form of instability and failure of slope showed mainly sliding, collapse, spalling and plastic flow. The sliding form, that is rock mass deformation and failure of the slope, refers to the specific surface and combination of the surface along the shear failure of slopes (Zhang 2007).
