Research and Application of Using Coal Gangue Instead of Fly Ash in Filling
During the"three down"coal mining,the process of grouting and filling of overlying rock separation layer was adopted.Through optimization of grouting materials,the sampling analysis,ground settlement effect analysis and economic benefit comparison were conducted on coal gangue and fly ash,and the conclusion was drawn that using coal gangue instead of fly ash as raw material for overlying rock separation layer grouting can achieve maximum economic benefits.
grouting of overlying rock separation layercoal ganguefly ashcreating profits
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