The upward drift stoping with backfill is a mining method with a widespread use future.
上向进路充填采矿法是一种具有广阔应用前景的采矿方法。
2
The practice of bolt support in reserved coal drift 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。
3
To overcome the difficulty of unstability of orebody and surrounding rock, the test of flat-back cut-and-fill driftmining is carried out.