Ground control is one of the major problems in deep mining.
地压控制是深部采矿的主要问题之一。
In deep mining, rock changes from hard to soft, from solid to liquid.
深部开采，岩石由硬变软，由固变流。
Deep sea mining is an extremely complex technological process.
深海采矿是一个极其复杂的工艺过程。
Mobile robot is one of the most central subsystems of deep sea mining system.
移动机器人是深海采矿系统中最为关键的子系统之一。
A new heaving data acquisition system about mining ship on the deep sea is designed.
设计了一种新型深海采矿船升沉信号采集系统。
So the study on the deep back filling technology has great significance in mining practice.
因此，研究深井充填技术具有重大的现实意义。
So the study on the deep back filling technology has great significance in mining practice.
因此，研究深井充填技术具有重大的现实意义。
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