大断面破碎巷道全空间桁架锚索协同支护研究

发布时间：2018-01-13 23:05

本文关键词：大断面破碎巷道全空间桁架锚索协同支护研究　出处：《煤炭科学技术》2016年03期 　论文类型：期刊论文

【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。
[Abstract]:Due to the large section, breakage, capacity expansion, large deformation and so on, the conventional support is prone to uncoordinated deformation and instability due to the large section, breaking, expanding and large deformation of the roadway in the deep and large mining height fully mechanized caving face. Based on the systematic and in-depth analysis of deformation and failure mechanism of large section soft and broken roadway in Lu'an mining area, the coordinate deformation angle between 3D spatial support and surrounding rock is discussed. In this paper, a new technology of cooperative support of full space prestressed truss cable is put forward, and the supporting structure, supporting mechanism and superiority of full space truss anchor cable are expounded. The cooperative support scheme of full space truss cable is designed. FLAC3D is used to simulate and analyze the supporting effect, and the three-dimensional spatial distribution law of the roof prestress field of the roadway supported by full space truss anchor cable is obtained under different pretightening forces. The results show that the full space truss bolting can form a three-dimensional closed bearing structure.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;
【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)
【分类号】：TD353
【正文快照】： 引用格式:左建平,孙运江,王金涛,等.大断面破碎巷道全空间桁架锚索协同支护研究[J].煤炭科学技术,2016,44(3):1-6.Zuo Jianping,Sun Yunjiang,Wang Jintao,et al.Study on full space truss and anchor coordinative support of mine large cross section broken road-way[J].

【相似文献】