摘要
针对新副井所揭煤层群各煤层的特点,按有无突出危险性将煤层群分成两组,便于进行揭煤管理。按三阶段法在各个阶段采取安全揭煤措施:法距10 m～15 m处施工前探钻孔进行勘探煤层及测试瓦斯压力;法距5 m处打排放孔进行突出危险性预测;法距1.5 m～2 m处采取远距离放炮揭煤。进行效果评价,井筒顺利揭开煤层群。
Based on the characteristics of each coal seam of uncovered coal seam groups in new auxiliary shaft,two groups were divided for uncovering management according to outburst danger.Safety uncovering measures were taken in each stage according to three-phase approach： exploring coal seam and testing gas pressure at 10 m and 15 m exploration drilling before construction;outburst predicting at 5 m outlet opening;long distance uncovering coal blowing at 1.5 m and 2 m.,which enables shaft to uncover coal seams smoothly.
出处
《江西煤炭科技》
2011年第2期58-60,共3页
Jiangxi Coal Science & Technology
关键词
井筒揭煤层群
煤与瓦斯突出
三阶段法
shaft uncovering coal seam
coal and gas outburst
three-phase approach
