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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Mining is the second most dangerous profession in the U.S., averaging 27 deaths for every 100,000 workers per year, according to the U.S. Census Bureau.

采矿行业算得上全美第二危险的行业，来自美国统计局的数据显示，每年每10万名矿工就有27名殒命。

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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