杨庄矿深部矩形煤巷围岩破坏特征及支护技术  

Failure characteristics and support techniques of surrounding rock for deep rectangular roadway in Yangzhuang mine

作　　者：李清[1,2] 侯健[1] 韩通[1] 刘航[1] 王思嘉[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]深部岩土力学与地下工程国家重点实验室,北京100083

出　　处：《中国矿业大学学报》2016年第6期1124-1131,共8页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51374212;51134025)

摘　　要：为解决深部矩形煤巷支护难题,以巷道宽度为变量,采用室内实验、数值模拟、现场实测、理论研究的方法,建立了双裂隙抗剪切滑动力学模型,提出了高强高预紧力锚网索耦合分区支护技术.结果表明:顶板围岩主应力差分布范围、剪切破坏塑性区扩展延伸区域、变形延伸深度的响应程度均比底板、两帮强烈;顶板围岩可划分为裂隙贯通区、裂隙发育区、微裂隙区和无裂隙区;高强高预紧力锚网索耦合分区支护技术能积极调动顶板深部围岩强度,改善锚固体的应力状态,控制巷道围岩变形,满足矿井"安全、高效"的生产要求.Based on taking roadway width as a variate,methods of the laboratory experiment,numerical simulation,theoretical analysis and situation monitoring were utilized to resolve support difficulty in deep mine.Resisting shear slip mechanical model with double fractures was established.Blot-net-anchor coupling support with high strength and pretension force was put forward.The results show that responding degree for distribution range of principle stress difference,shear failure zone,and deformation in roof is the strongest.The fracture zones of roof can be respectively divided into three types which include fracture transfixion zone,fracture development zone,microfracture zone,and nonfracture zone.New support scheme is not only effectively feasible for utilizing the strength of rock masses in the deep roof and improving stress state of anchorage body,but also for controlling the deformation of surrounding rock and satisfying the mining demands.

关 键 词：矩形煤巷 巷道宽度 主应力差 裂隙区 耦合分区支护 

分 类 号：TD263[矿业工程—矿井建设]