采空区下巷道掘进技术——三交河煤矿北区石门过采空区技术攻关

Tunneling Techniques Adopted in Lower Roadway within Worked-out Area

文章介绍了三交河煤矿北区石门过采空区技术攻关的情况。

This paper introduces the tunneling techniques adopted in Shimen worked-out area of North Section of Sanjiaohe Coal Mine.