mining of spontaneous combustion deposit
自燃矿床开采
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有自燃趋势的高硫矿床与赋存于河谷下的矿床，由于开采技术条件复杂，限制了该类资源的及时开发利用，尤其是一些小型矿产资源。
High sulphur deposits with spontaneous firing tendency and under river deposits are restricted to develop due to its technical conditions, especially for the small deposits.
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