大安山 meaning in English

da'anshan

In order to solve the shortcoming of traditional explosion w ; dge - shaped excavation in da ' anshan mine , improve the rate of excavation and reduce the consumption of explosive materials , a series of excavation shapes are applied and experimented in the rock tunnel excavate
针对大安山煤矿传统的楔形掏槽爆破方式存在的弊端，本文提出在该矿进行新型掏槽实验研究，用以增加岩石巷道掘进效率和减少掘进爆破材料消耗。