司家营铁矿中深孔爆破形成切割井的试验研究

Experiment of using middle deep hole blasting to form cutting shaft in Sijiaying Iron Ore Mine

切割井是无底柱分段崩落法重要的采矿工艺之一,切割井质量的好坏直接影响爆破拉槽效果。为此,试验应用了中深孔爆破成切割井技术的新掘井工艺,比采用普通法施工切割井,从安全性、爆破质量及台班功效均有较大的提高,同时取得了良好的经济和社会效益。

The cutting shaft is important in the case of pillarless sublevel caving because the quality of cutting shaft influences directly the performance of undercutting via blasting. When comparing the method of using middle deep hole blasting to form cutting shaft with the common method, the former has advantages such as higher safety, better blasting performance, higher productivity per shift.