The practice of bolt support in reserved coaldrift in mining pressure area is introduced, helpful conclusion is obtained through observation and analyse.
介绍了煤巷锚杆支护在动压区留巷的实践，并通过观测及数据分析，得出了有借鉴意义的结论。
2
The excavation sequence is the key to the roadway stability in long-span full coaldrift.
大跨度全煤巷道开挖顺序是关系到巷道稳定性的关键。
3
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.