提出了3种矸石充填开采对提高资源采出率、延长矿井服务年限的重大意义及推广应用价值。
The backfilling methods with refuse were beneficial to improving mining rate of resource and prolonging mine life.
针对服务年限比较长的一些国有老矿，运用矿井的现有设备进行技术更新，充分体现了少投入，多产煤的原则。
Direct to the longer service time of some old state_owned mine, apply present mine equipments to renew them can reduce investment and inereasing coal output.
本文采用成本与效益分析的方法，从经济上对矿井合理服务年限的定量问题，作了理论上的探讨。
The optimal service life of a mine is discussed theoretically from economic point of view by analysing the cost and benefit.
乡镇煤矿资源回收率低，严重缩短了矿井的服务年限。
It has been shortening the service life of mines because of their low recovery ratio.
本文讨论了矿井井型与服务年限的关系以及储量备用系数问题。
This paper deals with the relationship between the size and the life of coal mines and the problem concerning reserve coefficient.
运行矿井提升绳的更换，在矿井运行服务年限中是有相当次数的。
There are many times of replacement of lifting ropes during the shaft service life?
其在我矿22315综放工作面试验的成功不仅丰富了回采工艺技术，还为矿井长期稳产、高产以及延长矿井的服务年限具有重要意义。
Its successful trail at the fully mechanized caving 22315 face not only enriches the mining technology, but also is of great significance in the aspects...
其在我矿22315综放工作面试验的成功不仅丰富了回采工艺技术，还为矿井长期稳产、高产以及延长矿井的服务年限具有重要意义。
Its successful trail at the fully mechanized caving 22315 face not only enriches the mining technology, but also is of great significance in the aspects...
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