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为创造良好的作业环境,提高安全强度,建设标准化矿井,林县大众煤矿投资80多万元,改进巷道支护。 大众煤矿建矿40多年来一直沿用坑木密扣棚支护形式。其中鲁仙井煤层瓦斯含量高,围岩压力大,而坑木支架抗压力差,强度低不安全,给巷道支护带来严重困难,往往是前边掘进,后边更换折梁断柱,或前边刚刚维修过去,后边又是折拄成堆,巷道维修费用惊人。1987年,省煤炭厅把这个矿井列为豫
In order to create a good working environment, improve safety and build a standardized mine, the mass coal mine in Linxian County has invested over 800,000 yuan to improve roadway support. Mass coal mine construction has been used for more than 40 years pit mound covered shed form of protection. Among them, Luxianjing coal seam has high gas content and large surrounding rock pressure. However, the pit-rock brackets have poor pressure resistance and low strength and unsafe strength, which brings serious difficulties to the roadway support. The front tunneling is often followed by the replacement of the broken beam or the front Just the maintenance of the past, the back is folded Zhu pile, amazing aisle repair costs. In 1987, the provincial coal hall classified this mine as Yu