During mining, fill in primary stopes should be exposed and its strength measured.

采用铲运机出矿、机械化充填，获得了较好的技术经济指标。

Large areas of emptied stopes pose great dangers to the security production upon decades of mining.

某钨矿经过几十年开采留下大量采空区，并存在较大安全隐患。

Attachment air is one of the important characteristics of the air-flow structure in flat chamber stopes.

附壁风流是扁平型峒室采场风流结构的重要特征之一。

Study on the field stability at the mine abandoned stopes is a key step whether a construction can proceed or not.

煤矿废弃采空区场地稳定性研究是决定能否进行建筑的关键步骤。

Frequent rock-falls within stopes for many years have interrupted production and brought great ore loss and pollution.

多年来采场跨塌频繁，严重地影响了生产，并带来很大的采矿贫化损失。