The sizes of section are related to the drivage costs, maintenance costs and ventilation electric costs.

井巷断面大小直接关系到掘进费 、 维护费和通风电费.

互联网

Therefore, increasing the rock drivage speed has the most inportant meaning to accelerate the shaft building.

因此, 提高岩巷掘进速度,对加速煤矿建设有非常重要的意义.

互联网

Mine rational drivage rate is a very important role in balancing coal cutting and driving.

合理掘进率对矿井采掘平衡具有重要的作用.

互联网

The cut way and hole parameters affect the drivage efficiency and cost.

掏槽方式及布孔参数影响着掘进效率和成本.

互联网