巷道支护中锚固段位置对深部围岩塑性区的影响  

Influence of Anchorage Section Position in Roadway Support on Plastic Zone of Deep Surrounding Rock

作　　者：肖宇 王卫军[1,2] 袁超[1] 黄聪 唐利明 Xiao Yu;Wang Weijun;Yuan Chao;Huang Cong;Tang Liming(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学,资源与环境安全工程学院,湖南湘潭411201 [2]湖南科技大学,南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2020年第1期1-6,共6页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51804109,51434006,51874130);湖南省教育厅科研资助项目(18C0333);湖南科技大学博士启动基金资助项目(E51851)。

摘　　要：本文以江西曲江矿区212工作面风巷为研究对象,基于3DEC数值模拟软件,结合理论分析,研究了不同支护方式对巷道稳定性的影响.研究结果表明:(1)锚杆锚固段位置能够影响巷道围岩塑性区范围.当锚杆(锚索)锚固段处于弹性区时,锚杆(锚索)对巷道围岩塑性区扩展的控制效果良好;而锚杆(锚索)锚固段处于塑性区内时,锚杆(锚索)不能有效的控制围岩塑性区扩展.(2)围岩塑性区范围与巷道变形量存在相对一致性,塑性区范围越大巷道断面的变形量越大.(3)在巷道支护中单纯使用锚杆支护无法有效控制围岩变形,为达到控制巷道围岩稳定的目的须使锚杆(锚索)充分发挥锚固作用,将锚固段置于弹性区内,应采用锚杆锚索耦合支护.This paper takes the 212 working face wind tunnel in Qujiang mining area of Jiangxi Provinceas the engineering background.Based on 3DEC numerical simulation software and theoretical analysis,it studies the influence of different support methods on the stability of the tunnel.Results show that(1)the location of the anchor section can influence the plastic area of the surrounding rock in the roadway.When the anchor is in the elastic zone,the control effect of the anchor on the expansion of the plastic area of the surrounding rock in the roadway is good,and whenthe anchor is in theplasticzone,it cannot effectively control the deformation of the surrounding rock;(2)the range of the plastic area of the surrounding rock is relatively consistent with the amount of deformation of the roadway,the greater the deformation of the larger section of the roadway;(3)the roadway support alone cannot effectively control the use of anchor support rock deformation,in order to achieve the purpose of controlling the roadway rock stability shall make the anchor give full play to the role of the anchoring,the anchor section is placed in the elastic zone,should be used anchor cable joint support.

关 键 词：深部围岩 塑性区 锚固段 3DEC 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]