This paper not only analyses the present conditions of the mines but also analyses and discusses the means to increase the hi-productivity and efficiency in mines.
对地方煤矿目前的生产状况进行了分析，对地方煤矿建设高产高效矿井的方法进行了分析和探讨。
Caving method is a high efficiency mining method widely used in underground metal mines. While it is a characteristic of the method that the loss rate and dilution rate is high.
崩落采矿法是金属矿山地下开采应用较多的一种高效采矿方法，覆岩下底部放矿损失贫化大是该采矿法的一个特点。
It is proved that the rock bolting is the most suitable supporting type for coal roadways in coal mines with high efficiency and low cost.
实践证明，锚杆支护是目前最适合煤巷的高效、经济的支护方式。
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