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补连塔煤矿31401工作面临近贯通时顶煤厚度太薄,加上煤层顶板结构复杂,强度小,矿压显现明显,至距停采线7 m时,30架~120架范围全都出现漏矸。通过论证,制定出暂停推进工作面,从通道正帮向剩余煤体注玛丽散,将其铸成玛丽散实体的方案。从而增加了煤体强度,控制住了顶板,确保剩余段贯通时对采高做了大幅度调整,最终取得较理想的贯通质量,为回撤工作创造了较好条件。
When the work face of 31401 coal mine in BuLiTa Mine is too close, the thickness of top coal is too thin, and the structure of coal seam roof is complex with low strength and obvious underground pressure. When it reaches 7 m from the stop mining line, . Through the demonstration, we have worked out a plan to temporarily stop the work from moving forward and channeling the remaining coal from the corridor to make it into Mary’s solid body. Thereby increasing the strength of the coal, controlling the roof, making sure that the remaining sections of the mining have been greatly adjusted when they pass through, and ultimately achieve a better penetration quality, creating better conditions for the retracement.