回采率是衡量矿山生产技术管理、资源综合利用水平的一项主要的经济技术指标。
Mining recovery is a main economic-technical index to measure mine enterprise's levels of production management and resources comprehensive utilization.
武山铜矿南矿带采用上向水平分层进路水砂充填法回采，采场多次发生冒顶、片帮。
The South ore-bearing zone of Wushan copper mine is mined with ascending horizontal slicing hydraulic fill crosscut mining system. Roof falling and rib spalling occurred in any times.
推荐使用机械化上向水平分层充填采矿法，提出了安全回采措施。
The upward horizontal cut and fill stoping method and the measures for safe mining are recommended.
利用平面图形几何重心公式计算回采工作面水平投影图形的重心坐标，然后根据影响传播角和开采深度计算下沉盆地中心位置的坐标。
The barycentric coordinates of the plane view projection of a coal face are solved with a formula of geometric gravity centre.
利用平面图形几何重心公式计算回采工作面水平投影图形的重心坐标，然后根据影响传播角和开采深度计算下沉盆地中心位置的坐标。
The barycentric coordinates of the plane view projection of a coal face are solved with a formula of geometric gravity centre.
应用推荐