Affiliation:
1. National Key Laboratory of Baiyunobo Rare Earth Resources Researchs and Comprehensive Utilization, Baotou Research Institute of Rare Earths , Baotou 014020 , China
2. School of Energy and Mining Engineering, China University of Mining and Technology Beijing , Beijing 100083 , China
Abstract
Abstract
Owing to the deep concave mining in Bayan Obo stope, the slope angle is steep, the terrain is high, the outcrop width of the crushing belt is large, the stability of many slopes is poor, and there are potential sliding surfaces. In this paper, through on-site investigation and sampling, the main factors affecting the landslide of the high and steep slopes of Bayan Obo are analyzed. Uniaxial compression tests were carried out to obtain the mechanical parameters of dolomite and slate. With the help of the three-dimensional digital speckle system, the whole process of slope landslide under rainfall conditions was studied through similar simulation and numerical simulation experiments. The influence of rainfall on the slope of Bayan Obo and the induced pattern of landslide were revealed. The experimental results show that rainfall is the key to inducing instability, the slippage at the edge of the slope is obvious, and there is seepage in the depths but the effect is not significant. The landslide can be roughly divided into the damage accumulation stage; the deformation development and expansion stage; and the unstable slip stage.
Funder
National Natural Science Foundation of China
Publisher
Oxford University Press (OUP)
Subject
Management, Monitoring, Policy and Law,Industrial and Manufacturing Engineering,Geology,Geophysics