千米深井保护层开采巷道围岩锚杆索承载规律

Bearing law of anchor cable in surrounding rock of roadway in protective layer mining of kilometer deep mine

为分析千米深井保护层开采巷道围岩锚杆索承载规律,以安徽朱集西煤矿13501工作面轨道顺槽为工程背景,采用现场实测方法监测下保护层开采后上覆13501工作面轨道顺槽掘进影响期间锚杆索承载状况。阐明下保护层开采影响下上覆煤层巷道围岩锚杆索承载规律,为巷道支护设计提供了理论指导。井下矿压监测结果表明,锚杆索支护结构补偿的支护方案,可以提高锚网支护承载结构的整体稳定性及承载能力,达到支护-围岩共同承载的目的,从而有效控制了此类巷道围岩的强烈变形。

In order to analyze the bearing law of anchor cable in surrounding rock of roadway in protective layer mining of kilometer deep mine,taking the track roadway of 13501 working face in Zhujixi Coal Mine as the engineering background,the field measurement method is used to monitor the load-bearing condition of anchor cable during the influence of track roadway excavation of 13501 working face after mining the lower protective layer.By analyzing the bearing law of anchor cable in surrounding rock of roadway in overlying coal seam under the influence of lower protective layer mining,it can provide theoretical guidance for roadway support design.The underground mine pressure monitoring results show that the support scheme of anchor cable support structure compensation can improve the overall stability and bearing capacity of bolt mesh support bearing structure,achieve the joint bearing of support and surrounding rock,and effectively control the large deformation of surrounding rock of this kind of roadway.