flat back method是什么意思

网络释义

用法例句

The technological characteristics of upward horizontal cut and fill stoping,mechanized upward drift cut and fill method and mechanized downward drift cut and fill method are introduced and a few points to improve them are put forward.

介绍了焦家金矿先后试验应用的上向水平分层充填采矿法、机械化上向进路分层充填采矿法及机械化下向进路分层充填采矿法的工艺特点，并提出了几点改进意见。

Predicting the up-curl chip breaking of three-dimensional groove inserts;

三维槽型断屑上向卷曲切屑折断预报

Computer simulation of upflow rough filtration;

上向流粗滤工艺实验与计算机模拟

The filtration principle of gravity filter(includes upflow and downflow)is firstly introduced and analyzed,and the standpoint which wastewater advanced treatment should adopt upflow filter is illustrated in many angles.

首先介绍和分析了重力式滤池两种流向 (上向流式和下向流式 )的过滤机理 ,并从多方面阐明了污水深度处理宜采用上向流式滤池的观点 。

The kinetics of nitrification biofilm in upflow and pure oxygen has been studied.

对上向流直接供氧生物膜硝化动力学进行了试验和讨论。

New application of upward slicing and filling by tailing in Chuang-Shang Gold Mine;

上向分层尾砂充填法在仓上金矿的新应用

Using panel mechanization,the rd and 4th slices of stope 176 were mined by method of upward horizontal slicing and consolidated fill with tailing.

应用盘区机械化上向水平分层尾砂胶结充填采矿法 ,回采该采场的三分层、四分层 ,将采矿损失率降至4 4 %,取得了较好的经济效益。

According to the mining conditions in the north district of Shirenzhang Tungsten Mine,authors proposed a special mining method suitable to the ore bodies with the oblique angles of 30°￣ 55°, fine thickness and very poorly stable hanging wall, that is, resue method of flat-back cut and fill stopping with stablized bottom floor.

针对石人嶂钨矿北组倾斜极薄矿脉顶板不稳固的开采技术条件，提出采用上向分采胶结底板充填采矿法，进一步完善了削壁充填法回采工艺，有效地降低了回采损失与贫化，充分回收了矿山资源，明显提高了经济效益。