This paper analyzes the preconditions for small and medium-sized coal mines to increase coal recovery rate, and puts forward some paths and measures for the second mining of the coal resources.

分析了中小煤矿提高煤炭资源回收率的前提保障条件，提出了复采煤炭资源的途径和措施。

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Komatsu is the world's second-largest maker of construction and mining equipment, trailing Caterpillar.

小松是世界第二大建筑及采矿设备制造商，仅次于卡特彼勒。

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On May 2nd Norsk Hydro announced that it was acquiring the aluminium assets of Vale, the world's second-largest mining company.

5月2日，挪威海德鲁(Norsk Hydro)公司宣布正在运作并购淡水河谷(Vale)公司旗下的铝资产，淡水河谷公司是世界第二大矿业公司。

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The Gillard government has anticipated a second mining boom, he says, and allocated spending in anticipation.

CNN: Australia: Losing 'know-how' economy?

On the other hand, a second Chinese mining company operating in Peru, state-owned Chinalco, has so far behaved differently.

CENTERFORSECURITYPOLICY: Questionable Chinese mining practices in Latin America

Second, mining firms need to watch for rising inflation.

FORBES: PDAC2012: China's Economy Should See 'Soft-Landing'; Supportive For Base Metals -- Scotiabank