开采深度 mining depth
安全开采深度 safe-mining depth ; Safety mining depth ; safety exploiting depth
最优化开采深度 optimization of mining depth
深井开采 deep mining ; deep working ; deep well mining
深层开采 [油气] deep production
深部开采 [矿业] deep mining ; deep coal mining ; mining at great depth
深井开采技术 Technologies Required for Deep Mine
分层台阶深孔开采 sublevel long hole benching
通过对柳钢屯秋矿开采中的爆破工作进行总结研究，提出采用露天开采深孔爆破的技术条件与安全保障措施。
The technical requirements adopted for open long-hole blasting and its insurance countermeasures were put forward by summarizing the blasting operation during exploiting the Tunqiu Mine of Liugang.
开采这些超深的油矿沉积层所需的钻探压力是开采海上石油正常压力的三倍。
These ultra-deep deposits must be drilled at up to three times the normal pressure for offshore oil.
它的开采始于1913年，是世界第二深的矿区。
It was opened in 1913, and is the second most deep in the world.
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