Study and Application of Gas Content to Prediction of Coal and Gas Outburst

According to the limitation of the shallow predicted depth, low fficiency and others existed in the present coal and gas outburst prediction method in Chi na, in combination of the special deposit conditions and the physical mechanics properties of the outburst seam in China, a completed set of the new technology and eq uipment was researched and developed based on the gas content to predict the coal and gas outburst. The new technology and equipment would be mainly including th e technology, equipment and technique to directly and rapidly measure the seam gas content, the software program for the 3D numerical simulation of coal and gas out burst, the deep borehole drilling and scheduled sampling technology and equipment suitable for medium soft outburst seam, critical vale determined method of the gas content index and others.With the researches, the depth of the outburst prediction for the coal mining face would be increased from the present less than 10 m to 65 m and the prediction time could be reduced by 50%.The No.13 seam in Guqiao Mine of Huainan Coal Mining Group as a case could show the critical vale determined proc edure and method of the gas content index.The critical vale of the gas content index for No.13 seam in Guqiao Mine preliminarily was determined as 8.00 m3/t.