| expl. | This study is restricted to the two types of rock so that the variations in rock mass properties are minimized and the influence of blast design parameters stemming, burden and specific charge on fly rock distance could be analyzed | 本研究针对两种岩石、以便将岩体特性的变化趋于最小、并能分析爆破设计参数如炮泥、抵抗线和单位炸药消耗等的影响 |