Sub-level caving is an efficient and safe mining method.

无底柱分段崩落采矿法是一种高效安全的采矿法。

youdao

The upward horizontal cut and fill stoping method and the measures for safe mining are recommended.

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。

youdao

It has important theoretical application for the reclamation and safe mining in shallow resources of similar coal mines.

对类似矿井浅部资源的回收与安全开采具有理论意义和应用价值。

youdao

Radiation is a threat to human health at every stage of the process, from uranium mining to plant operation (even in those new ultra-safe plants) to waste disposal.

ECONOMIST: A renaissance that may not come