缓倾斜层状岩体巷道断面形状与支护方式  

Cross-Sectional Geometry of Drifts in Gently Sloping Layered Rock and Support Method

作　　者：任凤玉[1] 丁航行[1] 张东红 张晋军 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]中色建设非洲矿业有限责任公司谦比希铜矿,赞比亚基特伟22592

出　　处：《东北大学学报（自然科学版）》2011年第1期125-128,共4页Journal of Northeastern University(Natural Science)

基　　金："十一五"国家科技支撑计划项目(2008BAB34B01)

摘　　要：谦比希铜矿主矿体西区矿岩稳固性差,采动压力大,沿脉进路塌方冒顶严重.针对缓倾斜层状围岩条件,分析了进路冒顶的原因和冒顶后巷道表层压力的变化,得出冒顶后的巷道断面是自适应岩体结构而趋于稳定的巷道断面的结论,据此提出用直立三角形巷道断面取代现用的1/4三心拱巷道断面以及着眼于结构稳定的锚杆支护措施.这一方案实施后,沿脉进路的稳定性条件得到明显改善,巷道利用率由原来的不足90%提高到100%,取得了显著成效.The poor rock stability and high ground pressure in the western zone of the Chambishi Copper Mine in Zambia resulted in serious roof failure of the along strike drifts.The reasons of roof failure and the following changes in the surface stress of drifts were analyzed under the conditions of gently sloping layered surrounding rock.Furthermore,a conclusion was drawn that the drift section after roof failure tends to be stable,because it becomes self-adaptive to rock mass structure and pressure since then.Therefore,an erect triangular cross-section of the drift is proposed instead of the existing 1/4 tri-center arch section,with rock bolts used to stabilize the rock structure.After the implementation of the scheme,the stability conditions of drifts were significantly improved and the utilization ratio of drifts was increased from 90% to 100%,i.e.,a remarkable success.

关 键 词：不稳岩体 高应力 沿脉巷道 采准工程 地压控制 

分 类 号：TD322.4[矿业工程—矿井建设]