Stability of High and Steep Slope of Weak Rock Formation in Open Pit Mine Based on Subjective and Objective Comprehensive Weight-forward Cloud Model
Open-pit mines commonly feature soft rock layers as slope components,which pose a greater danger and complexity compared to general slope types in engineering.To address the ambiguity in stability research of these special geological slopes and ensure reliable results for stability safety evaluation,this study adopts the Analytical Hierarchy Process(AHP)to establish a quantified grade interval-based stability evaluation index system specifically designed for slopes with soft rock layers.It utilizes a combination of fuzzy AHP and an improved entropy weight method to derive a comprehensive weighting method that incorporates both subjective and objective factors.Additionally,cloud theory is employed to construct a cloud model diagram representing the stability identification standards for high-slope slopes with soft rock layers in open-pit mines.Taking an open-pit mine as an example,the actual cloud map for evaluating the stability of the open-pit high and steep slope was generated,and the similarity between the actual cloud map and the modified cloud map was calculated by using the Dice algorithm to evaluate the stability of the open-pit high and steep slope.The results show that the similarity between the actual cloud map and the modified cloud map for the total evaluation of the stability is{0.0127,0.4284,0.7832,0.2043}.The slope stability is unstable(Grade C),which is basically consistent with the analysis results of numerical simulation and the analysis results of the traditional limit equilibrium method,verifying that the model is scientific and effective to a certain extent.The study presents a targeted uncertainty analysis method for slopes with weak rock formations and it provides ideas and means for other similar complex slope stability analysis and prevention.
soft rock formationFAHPentropycomprehensive weightforward cloud modelevaluation of slope stability
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