Extension Cloud Model for Risk Assessment of Filling Pipeline Wear Based on DEMATEL Method
In order to scientifically and reasonably determine the risk level of filling pipeline wear,DEMATEL method and extension cloud theory were introduced,and DEMATEL-improved CRITIC-extension cloud model for risk assessment of filling pipeline wear was established.On the basis of constructing the evaluation system,the DEMATEL method was used to study the influence relationship between the index factors,and the DEMATEL centrality-improved CRITIC method was used to obtain the comprehensive weight of the index.According to the principle of extension cloud theory,taking four mines as an example,the wear risk status was evaluated by calculating the cloud comprehensive correlation degree.The results show that the pipe diameter and slurry concentration are the key factors of deep well filling pipelines wear.The risk of pipeline wear in four mines is at a large risk level,which is completely consistent with the evaluation results of unascertained measure and variable fuzzy set theory,indicating that the DEMATEL-improved CRITIC-extension cloud model is applicable and effective in pipeline wear risk assessment.
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