Evaluation of the stability of sliding and slumping slopes of folded-rock zones by the method of natural analogues

Abstract

The prediction of the development of slumps and slides on high mountain slopes and the evaluation of their stability are complex and insufficiently studied problems. The use of the method of natural analogues for estimating the stability of slopes appears to be promising. The prediction of the development of deformations in mountain slopes by the method of natural analogues is based on the engineering-geologic analysis of the natural setting and of the combined action of different factors.The development and stability of slopes may be predicted and evaluated with different degrees of accuracy, depending upon the stage of the engineering-geologic investigations, the complexity of the geologic structure of the slopes, the types of slumps and slides, and the type of construction and the uses of the given area. Different mathematical methods are used for processing the data from engineering-geologic surveys and map~ of the slidingcaving-in slopes. During the preliminary project stage, when there are data from engineering-geologic surveys of the tiver-valley slopes to scales 1:25,000 and 1: 50, 000, as well as of separate typical portions to larger scales, it is possible to formulate a tentative prediction. During the stages of the investigations for the technical project, which include large-scale surveying, (scale 1: 1000-1: 500) drilling, mining, geotechnical, geophysical, laboratory, and experimental-modeling work, it becomes possible to formulate an accurate prediction on the basis of ali the characteristics of the rock in the different decompression and weathering zones.