露天开采的矿山作业已于1962年停止。

Mining operations by open-cut methods ceased in 1962.

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它适用于各种露天开采的矿山和大型采掘运输联合作业的工程。

It is suitable for the engineering of various open - pit mines and large excavating - hauling combined operation.

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相对于地下开采的废石场，露天开采的排土场占地面积要大得多。

Relative to the waste rock dump of underground mining, open-pit mining needs a larger one.

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