Based on this, the explosive type that matched the ore rock conditions was determined and the basis for selecting the related parameters of the test of shaft excavation by one blasting was obtained.
据此确定了与矿岩条件相匹配的炸药类型，得到了试验地段一次爆破成井试验的相关参数选取依据。
2
The blasting hole arrangement of hard ductility rocks in the roadway excavation is discussed and explosive loading coefficient is determined.