So we construct for the background by the Second Shizuishan Mining, tunneling of the coal road and rockdrift, carried on research to single tunneling technique of the horizontal tunnel.
本文以石嘴山二矿煤、岩巷的掘进施工为背景，对水平巷道单巷掘进技术进行了研究。
2
The shape and energy distribution of direct wave is mainly influenced by drift, while the energy distribution of reflected wave is influenced mainly by the interface between coal and rock.