This paper introduces driving rock drift with minor diameter bit, minor diameter cartridage and minor diameter bolt, it can realize smooth blasting, roadway speed is raised, driving cost is reduced.
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。
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Ma Nianjie, Gao Qian. Reliability design of bolt supporting in coal drift. Project Identification Material of coal Science Fnd, 1997.