Abstract
The closure is just a way to build an underground wall blocking water by curtain grouting, by which in the district rich in water of mine two of Dongfeng coal mine curtain grouting was done to closure the passageway of water, reduce the water, remove the threat from water disasters, and improve the operation conditions, to promote the safety in production and increase the economic efficiency and the social efficiency; at the same time, protect the valuable water resources in periphery of mining area, maintain the balance of ecological environment, was worth to be popularized.
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