大断面破碎巷道全空间桁架锚索协同支护研究  

Study on full space truss and anchor coordinative support of mine large cross section broken roadway

作　　者：左建平[1,2] 孙运江[1] 王金涛[1] 陈岩[1] 姜广辉[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]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤炭科学技术》2016年第3期1-6,共6页Coal Science and Technology

基　　金：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)

摘　　要：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 support would easily cause uncoordinated deformation and stability lost in the high cutting fully-mechanized top coal caving mining face in a deep mine,based on a systematic deep analysis on the surrounding rock deformation failure mechanism of mine large cross section soft and broken roadway in Lu＇an Mining Area,from a view of the 3D space support coordinative load and surrounding rock coordinative deformation,a coordinative support technology of full space pre-stress truss and anchor was provided. The paper stated support structure,support mechanism and advantages of full space truss and anchor. With design on coordinative support plan of full space truss and anchor,a FLAC3 Dwas applied to numerical simulation analysis on support effect. The 3D space distribution law of roof pre-stress field in full space truss and anchor support roadway was obtained under different pretension conditions. The results showed that full space truss and anchor support could form a 3D closed loading structure.

关 键 词：大断面破碎巷道 全空间桁架锚索 协同支护 预应力场三维分布 

分 类 号：TD323[矿业工程—矿井建设]