The roadway excavation and supporting are crucial techniques in mining engineering.
巷道掘进与支护是采矿工程的技术关键。
Temporary supporting is a requisite working procedure for bolting work in full mechanized roadway excavation face.
综掘巷道采用锚杆支护时，临时支护是必不可少的一道工序。
The blasting hole arrangement of hard ductility rocks in the roadway excavation is discussed and explosive loading coefficient is determined.
介绍了该矿传统掘进凿岩爆破方法，详细阐述了该矿硬韧性岩的巷道掘进炮眼布设及装药系数的确定。
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