working face efficiency

基本解释

The homemade shearer is a main implement equipment of mine of high yield and efficiency in working face of production coal.
采煤机是综采工作面生产原煤和实现高产高效矿井的主要设备。
In order to enhance the efficiency of excavating coal, Beishan coalmine attempts to adopt millisecond delay direct initiation at working face.
百善煤矿为提高采煤效率，尝试在采煤工作面实行毫秒延期反向起爆。
The article introduces how to improve the digging efficiency of the working face of stone head in minefield, and discusses the measures to improve the construction schedule of stone head by examples.
介绍了如何提高矿区岩巷工作面的掘进工效，运用实例说明了提高巷道施工进度的对策。