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Application of Prediction Method for Coal and Gas Outburst in the Tunnel
Pages: 252-255
Year: Issue:  4
Journal: Highway

Keyword:  tunneldanger of outburstgas contentmultinomial forecast index;
Abstract: When the tunnel crosses through the coal strata,how to accurately forecast the coal seam outburst danger quickly and effectively is not only the premise of ensure tunnel security uncovering coal,but also can improve the work efficiency and alleviate the pressure of time limit for a project.Based on a railway tunnel No.6coal seam,experiment has been conducted to predicate the outburst danger,the determination and the gas desorption index of drill cuttings of K1 value of coal seam gas content,gas pressure to predicate the gas outburst danger of coal seam,and through a number of measured indicators to verify the predication result,which has improved the accuracy and reliability of prediction index.At the same time,through the theory and the practice,gas content can be used as indicators of the main indexes of predicting coal tunnel exposing outburst hazard,and provide the technical basis for uncovering coal construction.
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