深井断层破碎带穿层软岩巷道锚网索耦合控制对策  

Coupled bolt-mesh-anchor supporting technology for deep fault fracture zones throughout layers soft rock roadway

作　　者：郝育喜[1] 王炯[1] 王浩[1] 孟志刚[1] 郭志飚[1] 

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,力学与建筑工程学院,北京100083

出　　处：《采矿与安全工程学报》2016年第2期231-237,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51374214);国家自然科学基金青年科学基金项目(51404278)

摘　　要：旗山矿开采深度近千米,随着开采深度的增加,在高地应力、特别是在水平构造应力和断层切割条件的影响下,巷道围岩出现顶沉、帮缩和底鼓等大变形破坏现象,其中顶沉及帮缩量最大处超过1 100 mm,原有支护很难控制巷道围岩稳定性,严重影响和制约了煤矿的安全生产。基于此,以旗山矿千米深井断层破碎带穿层软岩巷道为例,详细分析了巷道破坏特征及主控因素,得出了高应力膨胀型软岩巷道的破坏力学机制,提出了注浆+非对称锚网索+底角锚杆耦合支护控制对策,实现支护体与围岩在强度、刚度和结构上的耦合,从而达到控制深部软岩巷道稳定的目的。上述成果在现场进行了应用,监测结果表明耦合支护对深部高应力断层破碎带穿层巷道的稳定性起到很好的控制效果。The mining depth is around 1 000 m in Qishan Mine. With the increase of mining depth, roadway has failure phenomenon including top, side, and floor heave, as well as other large deformation, with a maximum roof and side failure more than 1 100 mm, under the influence of high ground stress, especially horizontal tectonic stress and fault cutting conditions. The existing support can barely control the stability of surrounding rock of roadway, which has seriously affected and restricted the safety production. This paper has presented detailed analysis of the characteristics and controlling factors of roadway failures, based on the supporting project in Qishan soft rock roadway, and has put forward the failure mechanics mechanism of high stress soft rock roadway expansion, and developed the coupled bolt ＋ mesh ＋ anchor supporting measures to realize coupled supports with strength, stiffness and the structure, so as to achieve the stability control in deep soft rock roadway excavation. The effects of this coupling support have already been validated by the results of field monitoring.

关 键 词：高应力 复合型软岩 断层破碎带 穿层巷道 耦合支护 

分 类 号：TD353[矿业工程—矿井建设]