Damage Evaluation and Control Countermeasure of Mining Subsidence of Colliery.
煤矿开采沉陷损害评价及治理对策
The coal is dug, ground subsidence, gangue spontaneous combustion, ecological damage.
煤被挖走了，地面沉陷了，煤矸石自燃了，生态破坏了。
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