Critical Value Determination of Coal and Gas Outburst Risk Prediction Index △h₂ in Yangquhe Coal Mine

The forecast of coal and gas outburst is an important aspect of outburst prevention.The paper introduces the determination method and the result of coal and gas outburst risk prediction index △h₂ in working face with theoretical analysis and laboratory conditions.The practical application in the field shows the superiority of this method in improving the driving speed and reducing unnecessary outburst prevention measures.