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薛城煤矿为解决 14层煤采空区大量积水对开采三水平 16、17、18层煤的威胁 ,采取疏放措施 ,解决了安全问题 ,提高了经济效益
In order to solve the threat of a large number of water deposits in the 14th floor coal mined-out area on the 16th, 17th, and 18th floors of coal mining, Xuecheng Coal Mine adopted the measures of deregulation to solve the safety problems and increase the economic benefits