By comparision with manpower, material and financial resources thrown in mine transport equipment in drifting tunnel, points out the economic benefit of applying micro-belt conveyer.
对煤矿井下掘进巷道使用运输设备投入的人力、物力、财力等几个方面的分析比较，指出了使用微型胶带运输机的经济效益。
The advantages of the new support technology of shotcreting of polypropylene fibre are described, the benefits of reducing the total drifting and supporting cost of mine brought by the new technology are analyzed and the development trend of underground engineering support is pointed out.
介绍了喷射聚丙稀纤维混凝土支护新工艺的优点，分析了新工艺对矿山降低掘进支护总成本所带来的效益，指出了地下工程支护的发展趋势。
This paper took level 1280 strike drift of Dragon Head Mine as example to make an approach to the construction technology for drifting in bad strata.
本文以龙首矿1280沿脉巷道为例，对不良岩层中掘进的施工技术进行了探讨。
The characteristics of highly effective oppsite whirling axial auxiliary fan and its application at the south drifting face of Malan mine are introduced.
介绍了高效对旋轴流式局部通风机特点及其在马兰矿南翼采区掘进工作面的应用情况。