Research on Outburst Elimination and Pre-drainage Evaluation for Bedding Holes in Mining Face

In order to make the evaluation result exactly and reliablely, correctly reflect the outburst danger of the coal seam, on the basis of discussing the necessity and principle of evaluation, direct and indirect methods of outburst elimination evaluation, we propose a series of methods to evaluate the outburst elimination effect in the case of bedding pre-drainage in coal mining face. By directly actual measurement and indirectly computing of residual gas content, the effect of measures on eliminating the outburst danger in 3511 higher slice mining face of Yonghong Coal Mine is evaluated. The results show that the maximum residual gas content is 7.54 m³/t and 7.67 m³/t by indirectly computing and directly actual measurement, which are both lower than 8 m³/t. It is concluded that the risk of coal and gas outburst danger in 3511 higher slice mining face is eliminated.