深井软岩巷道帮底锚注支护技术应用

李金兰,刘滨．深井软岩巷道帮底锚注支护技术应用[J ]．矿业安全与环保,2019,4６（1）:６2－６8．

文章编号:1008－449５（2019）01－00６2－0７深井软岩巷道帮底锚注支护技术应用

李金兰1,刘 滨2

(1．湖北工业大学土木建筑与环境学院,湖北武汉4300６8;2．中国科学院武汉岩土力学研究所,湖北武汉4300７1)

摘要:为了研究控制深井软岩巷道大变形的有效支护方法,以淮南朱集煤矿轨道大巷为研究对象,分析了巷道变形破坏特征及其主要原因,并基于深部巷道支护原理,提出了考虑和不考虑帮底支护的

2套支护方案三利用FLＡＣ3Ｄ数值模拟软件,对不同支护方式下巷道围岩的应力场二位移场和破损区进行对比分析三数值模拟结果表明,加强帮底支护,能降低应力增高区的应力值,减小围岩扰动区二应力增高区和破坏区的范围,有效控制顶板围岩下沉和底板围岩隆起,验证了巷道帮底锚注支护技术的有效性三现场监测数据表明,巷道帮底锚注支护技术实施后,取得了较好的支护效果三

关键词:深部矿井;软岩巷道;高地应力;围岩分级;支护方案;帮底锚注支护

中图分类号:ＴＤ3５3 文献标志码:B 收稿日期:2018－02－1５;2019－01－14修订基金项目:国家自然科学基金面上项目（５14７420５）;国家自然科学基金青年基金项目（５1５04089,５1６09080,５1７0909７）,中国博士后基金项目（201６M５92223）作者简介:李金兰（19７9 ）,女,山东沂水人,博士,讲师,主要从事岩石地下工程方面的教学与研究工作三E －

mail :lijinlan1999@12６．com 三Bolt-grouting Support Technology of Sidewalls and Floor in Soft Rock Roadway of Deep Well

LI Jinlan 1,LIU Bin 2（1.School of Civil Architecture and Environment ,Hubei University of Technology ,Wuhan 430068,China ;2.Institute of Rock and Soil Mechanics ,Chinese Academy of Sciences ,Wuhan 430071,China ）

Abstract :In order to study tｈe effective support metｈod for controlling tｈe large deformation in deep soft rock roadway,taking tｈe track roadway of Zｈuji Ｃoal Mine in Huainan as tｈe researcｈoｂject,tｈe cｈaracteristic of roadway deformation and failure and its main reason were analyｚed,and ｂased on tｈe principle of deep roadway support,two sets of supporting scｈemes tｈat considering or not considering tｈe ｂottom support were put forward．By using FLＡＣ3Ｄnumerical simulation software and under different supporting modes,tｈe stress field,displacement field and damaged ｚone of surrounding rock of roadway were compared and analyｚed．Ｔｈe numerical simulation results sｈow tｈat strengtｈening tｈe ｂottom support can reduce tｈe stress value in tｈe stress increasing area,reduce tｈe range of disturｂance ｚone of surrounding rock,stress increasing ｚone and failure ｚone,effectively control tｈe suｂsidence of roof surrounding rock and uplift of floor surrounding rock,tｈe effectiveness of ｂolt－grouting support tecｈnology is verified．Field monitoring data sｈow tｈat good supporting effect ｈas ｂeen acｈieved after tｈe implementation of tｈe tecｈnology．Keywords :deep well;soft rock roadway;ｈigｈground stress;classification of surrounding rock;support scｈeme;ｂolt －grouting support of sidewalls and floor 随着浅部煤炭资源的枯竭,我国煤炭开采逐渐

向深部延伸,越来越多的矿井开采水平趋近千米三随着煤炭开采深度的增加,岩体的高地应力与低强度的矛盾越来越突出,开挖后的应力重新分布和应力集中引起围岩严重变形,巷道破裂失稳,造成巷道围岩控制和支护难度增大,工作环境恶化,生产成本

急剧增加[1－4]三因此,探讨合理的支护方式并研究相应的支护技术对控制深井软岩巷道围岩的整体稳定

有重要的理论意义和实用价值,是一个亟待解决的

课题三

国内学者对巷道支护方式进行了大量的研究,四

2６四Vol．4６Ｎo．1Feｂ．2019 矿业安全与环保Mining Safety &Environmental Ｐrotection 第4６卷 第1期2019年2月

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