Study on prediction of coal and gas outburst danger in No.21030 coal mining face of Liangbei Mine

With the collection and processing of the gas activities information and the measurement of the site gas parameters in No.21030 coal mining face of Liangbei Mine,the Langmuir equation was applied to calculate the gas pressure in the coal mining face.Base on the consideration of the seam structure and the seam gas parameters,according to the sensitive index and the critical value of the coal and gas outburst prediction,a prediction on the coal and gas outburst danger was conducted.The prediction results showed that No.21030 coal mining face would have a coal and gas outburst danger in potential.