为实现低透气性高瓦斯煤层群连续协调开采,采用数值分析、现场实测等综合手段,对高瓦斯煤层群工作面的协调开采技术进行研究。结果表明：工作面后方采空区底板岩层中,存在低应力卸压区域,但随着采空区矸石冒落充填压实后,又出现应力回升现象,不利于下伏煤层瓦斯抽采卸压；上覆煤层的采掘空间位于下煤层开采应力壳的影响范围内,围岩稳定性差,不利于上覆煤层的采掘。基于应力壳的存在及其演化带来的影响,提出了高瓦斯煤层群工作面“时间-空间-强度”协调统一的开采技术,新庄孜煤矿六二采区的6211(1)工作面和62108工作面回采结果表明,2个工作面间没有产生相互采动影响,实现了煤层群工作面的连续协调开采。%In order to realize continues and coordinative mining of low permeability and high gassy seam group,the numerical analysis,site measurement and other comprehensive means were applied to study the coordinative mining technology of coal mining face in high gassy seam group.The study results showed that there was low stress pressure released zone existed in the floor of the goaf behind the coal mining face and with the coal refuse caving and backfill compaction in the goaf,a stress rising phenomenon occurred again and could not be favor-able to the gas drainage and pressure releasing in the underlying seam.A mining and driving space of the overlying seam was located within a mining stress shell influence scope of the below seam and the poor stability of the surrounding rock with serious failure would not be fa-vorable to the mining and driving operation in the overlying seam.Based on the stress shell existed and the influences from the evolution,a time-space-strength coordinative mining technology of the coal mining face in the high gassy seam group was provided and applied to the No.6211(1)Coal Mining Face and No.62108 Coal Mining Face in No.62 Mining Block of Xinzhuangzi Mine.The results showed that during the mining process,there was no interaction mining influence between the two coal mining faces and continues and coordinative mining of the coal mining face in the seam group was realized.
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