The content of the research on changing the high shaft into a main ore-pass in Yong-Sha-Ba mine has three parts.

用沙坝矿高大副井改主溜井的研究内容主要分为三个部分：溜井放矿规律研究与振动出矿及相关技术的应用研究；

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The Houpoao tin mine has three mining sections, i. e. the west, the central and the east, with the west section having been mined-out and the east section being the major production area.

厚婆坳矿全矿分西、中、东三个区段开采，西区已采完，东区为主要出矿区段。

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Everyone has his hobby. Mine is reading. I have read many books, and Three Days to See is one of my favorite books.

每个人都有他自己的爱好。我的就是阅读。我读过很多书，《假如给我三天光明》是我最喜欢的书之一。

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The Ekati Diamond Mine has produced an average of approximately three quarters of a billion dollars of rough diamonds per year over the past five years, Harry Winston said in a statement.

FORBES: Harry Winston to Purchase Ekati Diamond Mine For $500 Million

The lunar outpost will most likely be placed on the lunar south pole, which is lit by the sun three-quarters of the time, and has possible resources to mine nearby.

ENGADGET: NASA planning to set up shop on the moon in 2024