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。

youdao

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。

youdao

Increasing in mining cost, industry-wide earning ratio should be more than that of national debt in the corresponding period.

矿山开采成本随矿山开发的深入，是逐年上升的，其行业收益率应大于同期国债收益率。

youdao

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