coal road protection wedge 护巷煤柱
coal road digging 煤巷掘进
digging coal road 煤巷掘进
coal road tunneling 煤巷掘进
bolt in coal road 煤巷锚杆
soft all-coal road 松软全煤巷道
coal road bolt net 煤巷锚网
three-soft coal road 三软煤巷
coal road bolt net support 煤巷锚网支护
This paper briefly introduces the application of pin timbering of full coal road in "islet faces".
文章对“孤岛面”全煤巷锚杆支护技术应用做了简要介绍。
Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine.
超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。
So we construct for the background by the Second Shizuishan Mining, tunneling of the coal road and rock drift, 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。
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