Bench height increasing is beneficial to reducing mining cost.

增加台阶高度对于降低采矿成本是有益的。

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It expounds the functional relation between the mining cost and the parameters of the working area.

文中阐明了吨煤成本与采垛参数的函数关系。

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China's shale gas exploitation is faced with a situation that the mining cost is high while the price was artificially lowered.

中国页岩气面临的是一种开采成本居高不下而售价却被人为压低的局面。

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Using the Goldman Sachs Commodities Index as a proxy for the costs of mining (because it is heavily weighted towards industrial commodities), the real cost of mining gold jumped by nearly 50% during this period, explaining why gold stocks did not provide the leverage that gold investors expected.

FORBES: Gold Mining Stocks Are An Increasingly Attractive Opportunity

However, since 2008, the ratio of gold to commodities has surged, slashing the real cost of mining gold by over 60%.

FORBES: Gold Mining Stocks Are An Increasingly Attractive Opportunity

Better yet, the real cost of mining gold is headed lower.

FORBES: Gold Mining Stocks Are An Increasingly Attractive Opportunity