Abstract
ABSTRACT More than 30 slides have taken place on the working slope at Pingzhuang west surface mine since 1960. The total volume of slides amounts to 4 million cubic meters. The slides have affected the mining operation seriously. The three-dimensional reliability model for the progressive slope failure is used to study the 26th slide. In the model, the sliding mass is subdivided into a number of columns. The friction resistance on the base of each column from lateral force of the slope is considered. The local average values of cohesion and friction angle on the base of a column are determined from the random field theory. The first local failure probability, the failure transition probability, the first failure column and the three-dimensional failure sequence are obtained. The outcomes indicate that the progressive failure mechanism is indeed the failure mechanism of the 26th slide.
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