深孔爆破形成切割天井技术

Deep hole blasting technique to form cut-raise

针对井下浅孔掘进形成天井存在的问题进行分析,建议采用中深孔一次爆破形成天井,节省工时,提高安全系数,减少作业难度。

The problems existed in shallow hole blasting to form cut-raise are analyzed. The deep hole blasting technique is recommended that has advantages of work hours saving, safety factor raising and work difficulty reducing.