Dealing with the practice of Jincheng Mining Bureau, the effect of breaking large coal on the washing technique and benefit is discussed, some helpful opinions are suggested.
结合晋城矿务局实际，论述了选前大块原煤的破碎对洗选工艺及效益的影响，并对破碎作业提出了一些建设性意见。
This paper mainly researches on the technique of draining long distance pressure relief gas in bed plate tunnel under the circumstance of mining protective coal seam.
本论文主要是针对远程下保护层开采条件下，对底抽巷上向穿层钻孔抽放远程卸压瓦斯技术进行了深入的研究。
So we construct for the background by the Second Shizuishan Mining, tunneling of the coal road and rock drift, carried on research to single tunneling technique of the horizontal tunnel.
本文以石嘴山二矿煤、岩巷的掘进施工为背景，对水平巷道单巷掘进技术进行了研究。
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