School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing) State Key Lab of Coal Resources and Safety Mining,China University of Mining and Technology (Beijing)

针对深部大采高综放工作面回采巷道由于断面大、破碎、扩容、大变形等,而导致常规支护极易发生不协调变形失稳的问题,基于对潞安矿区大断面软弱破碎巷道围岩变形破坏机理的系统深入分析,从三维空间支护协同承载与围岩协调变形角度,提出了全空间预应力桁架锚索协同支护新技术,阐明了全空间桁架锚索的支护结构、支护机理及其优越性。通过对全空间桁架锚索协同支护方案进行设计,并采用FLAC3D对其支护效果进行数值模拟分析,得到不同预紧力条件下全空间桁架锚索支护巷道顶板预应力场三维空间分布规律,表明全空间桁架锚索支护能够形成三维封闭的承载结构。

according to a large cross section,broken expansion,high deformation and others the conventional suppot would easil cause uncoordinated deformation and stability ost in the igh cutin full -mnechanized op cal aving mining face in a deep mine,vased on a systematic deep analysis on the surounding rock deformation failure mechanism of mine large cross section sof and broken roadiway in Lu an Mining Area,rom a view of the 3D space suppot coordinativeload and suroundng rock coordinative defomation a coordinative suppor technology of ful space pre-sress fuss and anchor was provided.T7he paper stated suppor structure,suppormechanism and advanages of fulspace truss and anchor.W ith design on coordinative suport plan of lul space russ and anchor,a FLAC3 Dwas aplied to numericasimulation analysis on suppor efect.The 3D space distibution law of roof pre-stress fied infull space truss and anchor suppor roadiway was obtained under diferentpretension conditions. The results showed that full space truss and anchor support could form a 3D closed loading structure.

国家自然科学基金资助项目(51374215,11572343)；霍英东教育基金会第十四届高等院校青年教师基金应用课题资助项目(142018)；高等学校学科创新引智111计划资助项目(B14006)；北京市科委重大科技成果转化落地培育资助项目(Z151100002815004)；