Research on Fatalness Evaluation about Bolt Supporting of the Roof of Coal Drift

Fault Tree Analysis(FTA) is one of the most important analysis methods of Safety System Engineering,the FTA has many advantages such as intuitionistic,clear and logistic features etc on describing the consequence of accidents.The FTA method is used to evaluate the fatalness about bolt supporting of the roof of coal drift in this article.The basal causation events and distributing of the minimal cut aggregates are confirmed by the constructed Fault Tree,then work out the fabric essentiality and carry through compositor to find the key factors to the accidents.It is a good way to provide reliable gists to the leaders and construction technology personnels of mining enterprises.