The analysis and forecast of gas emission in workface

The gas occurrence rule is the techno-basement of the study on the gas emission rule and gas harm harness. The part gas uneven emission in mou mine had effect on the mine's plan yield. To solve the gas uneven emission, the gas occurrence in work face was forecasted by means of statistical analysis and different-source calculation, and the effect factors and sources of gas emission are analyzed. The relation between gas pressure and elevation, the relation between gas content and elevation, the relation between hole gas emission and elevation were obtained, finally the aimed preventive measures are brought forward.