通过对丁集煤矿煤层突出危险性分析,研究确定了井筒穿过具有突出危险性煤层时通过地面预注浆进行固化煤层,降低煤层的孔隙率和瓦斯放散初速度,提高煤体强度,使煤体不具有突出危险性,再用远距离震动放炮方法安全快速揭开煤层。 Through the analysis of the prominent danger of coal seams in Dingji coal mine, the study determined that the wellbore should be solidified by ground pre-grouting through coal seams with prominent danger, so as to reduce the porosity and the initial velocity of gas release and improve the strength of coal so that coal Body does not have the prominent danger, and then use long-range vibration blasting method to quickly and safely uncover the coal seam.