| All the time, coal mine disasters which have brought great economic losses andthe casualties to the coal industry of China, caused great harm to coal mine productsafety. The coal mine disasters caused by equipment failure occupied a highpercentage of the accident in coal mine. It has importantly practical significance tomake effective diagnosis and timely prediction for coal mine equipment failure.This paper analyzes the characteristics of coal mine equipment and its failure.According to hierarchy of failure, we propose a hierarchical fault diagnosis modelbased on fault tree. Through the layered method to summarize the possible failurereasons and then draws out the dynamic fault tree of coal mine equipment failure.Then analyze the causes of equipment failure based on analysis theory of fault tree toidentify the weaknesses of equipment system, and focus on monitoring over theequipment or component parts which may be faulty or propose rationalizationalmeasures. Then put the shearer traction failure as an example to prove the feasibilityand effectiveness of this analytical method.As we all know, coal mine equipment failure has the characteristics ofuncertainty and ambiguity, and the mapping relationship between the fault symptomand causes of malfunction is not so clear, there are one-to-many, many-to-one ormany-to-many mapping relationship. In order to analyze this type of mine equipmentfailure, we introduce fuzzy mathermatics based on fault tree analysis and research thefuzzy diagnosis method of mine equipment failure. Firstly we discuss the basicprinciples and fuzzy mathematical rules related to coal mine equipment failure. Andthen focus on the method and process of vague diagnosis. Finally, put the shearertraction failure as an instance, combine fault tree analysis method with vaguediagnosis method, we hold the conclusion that it can improve the efficiency forequipment failure.Finally, combined the hierarchical modeling method of coal mine equipmentfailure and fault tree analysis method, completed fault tree analysis system of themine equipment failure, using which to prove the rationality and effectiveness of themethod. |
