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通过谢一矿实例阐明和对比合理分层开采不仅降低原煤灰分和含矸率,提高了煤质,而且取得较好的经济效益。
Through the example of Xie Yi mines, it is clarified and compared that reasonable stratified mining not only reduces the ash content and refuse content of raw coal, improves the coal quality, but also obtains better economic benefits.