无切井扇形深孔爆破自拉槽新方法

切割拉槽是无底柱分段崩落法重要的采矿工艺之一,拉槽质量好坏严重影响爆破回采效果,但矿体软破的采场由于施工安全条件差,切割拉槽困难而质量不易保证,所论述的无切井扇形深孔爆破自拉槽法是一种安全、简便、可靠的切割方法,具有广泛的推广应用价值。

A New Method of Fan-shaped Deep Hole Blasting Self-cutting With No Cutting Raise

Cutting groove is one of the important processes of the pillarless sublevel caving method.The quality of the broached groove greatly influences the effect of blasting and mining,but because of the poor construction security in the mining area with soft and breaking orebody,cutting groove is difficult and its quality is hard to be ensured.The fan-shaped deep-hole blasting self-cutting with no cutting raise is a safe,simple and dependable cutting method which has a broad promotion and application value.