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高档放顶煤是三河尖煤矿回采残采区域煤柱条件下推广和应用的回采工艺新技术,根据7101工作面开采的矿压观测,对放顶煤开采的顶板运动规律和矿压显现特征进行了总结,并就单体支柱承载特性等进行了的探讨分析。分析和实践表明:放顶煤开采工作面顶板矿压显现缓和,顶煤的垫层作用降低了工作面来压显现强度,同时,覆岩的矿压作用又加剧了顶煤的破坏,使顶煤更易于冒落,增加了煤炭资源的回收。
High-grade caving coal is a new technology of recovery technology promoted and applied under coal pillar mining conditions in Sanhejian Coal Mine. According to the rock pressure observation of 7101 mining face, roof movement law and the characteristics of rock pressure show in the top coal caving mining Summarized, and carried out the analysis of the bearing characteristics of single pillars. Analysis and practice show that the roof pressure of top coal caving mining appears to be moderate, the cushion effect of top coal reduces the apparent strength of the working face, and the rock pressure of overburden aggravates the destruction of top coal, Coal is more likely to fall, increasing the recovery of coal resources.