Finding out the Major Factors of Controlling Gas Outburst by the FTA Method

Abstract：Based on having generally analyzed multinomial factors including of gas and geology which can bring on the gas-outburst's happening, the process of establishing a universal FTA (fault tree analysis) model for gas-outburst is discussed.The applying event function of Luling coal mine of Huaibei mining group has been created according to the geological condition and the Gas Outburst.The weightiness coefficient of all basic events of minimal secant collections of the applying FTA model has been calculated and found, which can indicate the degree of the different control factors' action to gas-outburstThe method can offer quantitative basis for marking off gas-geological sections and forecasting the happening of gas outburst.

Keyword：FTA;Gas Outburst;Major Control Factors;regional forecast;