The belated enforcement of mining safety standards has led to closure of many small mines and temporary shortage of coal.

采矿安全标准姗姗来迟后，许多小煤矿被关闭，导致了暂时性的缺煤。

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These are mainly attributed to the mining's geological background, the distribution of mercury belt and the mercury mining scale, and the mine closure time.

在沉积物中汞含量的比较也是得到相同的结果，这主要与矿区的地质背景、汞矿带的分布、还与汞矿开采规模、汞矿停产时间有关。

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The 50 areas announced on Monday included the village of Lynemouth, in Northumberland, which has experienced a significant decline in traditional industries such as mining and recently saw over 500 jobs lost through the closure of a factory.

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It survived the closure of the pit in 1993 and relied on sponsorship money from a coal mining company, which ended in 2011.

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