According to the problems of advance support of large cross-section mining roadway in 8.2 m large mining face in Jinjitan Coal Mine,the double-row multi-section self-moving advanced support frame type was determined by comprehensive geological conditions and propulsion efficiency.Adopting the support concept of low initial support and high engineering resistance and the automatic assurance technology of initial support force,new structures,such as anti-roof guard,walking control and slope connecting beam were developed and the advanced support group of air return lane and transport lane was developed.The downhole test showed that the anti-mine pressure ability of the advanced support was strong,the propulsion efficiency was high,the top roof of the advanced roadway was complete and had good adaptability.The repeated support function of the integral support beam of the advance support to the roof was further analyzed,which could provide a model and reference for the advance support technology of the ultra large height mining face.%针对金鸡滩煤矿8.2m大采高工作面大断面回采巷道超前支护难题,综合地质条件和推进效率等因素,确定了双列多节自移式超前支架架型.采用低初撑力、高工作阻力的支护理念和初撑力自动保证技术,开发了避锚护顶、行走调控和斜坡式连接梁等新结构,研制出回风巷和运输巷超前支架组.井下试验表明超前支架抗周期来压能力强,推进效率高,超前巷道顶板完整好,具有良好的适应性;进一步分析了超前支架整体顶梁对顶板的反复支撑作用,提出了柔性顶梁的方解决案,为超大采高工作面超前支护技术提供了示范和参考.
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