段昌瑞,郑群,薛俊华,余国锋,罗勇

• 1:淮南矿业(集团)有限责任公司
• 2:煤炭开采国家工程技术研究院
• 3:深部煤炭开采与环境保护国家重点实验室

摘要(Abstract)：

以淮南矿区-1 000 m为典型代表的深部地下开挖工程引发的支护难题越发突出。针对丁集煤矿-910 m西二11-2采区南轨道大巷实测发现的巷道分区破裂化现象,基于深部巷道围岩破裂机理与支护技术模拟试验系统,开展了4种工况下硐室的模拟试验研究,旨在获取最大荷载方向与硐室轴线垂直、斜交、平行条件下巷道围岩的受力与破坏特征,揭示深部巷道围岩发生分区破坏的条件。试验结果显示,模型拱顶、侧墙和底板周边径向应变均呈现拉应变,形成环状裂缝;在较大轴压作用下,巷道周边产生剪切破坏和拉伸破坏,但拉伸、剪切破坏区的形成不同步,拉伸破坏的速度远大于剪切破裂的速度,使周边岩体产生这种不连续且交替出现的环状裂隙区。直墙圆拱巷道发生分区破裂的特点为帮部呈现分层断裂,拱顶和底部呈现滑移型断裂。研究结果可为深部高地应力下巷道围岩的支护对策及优化提供参考。

关键词(KeyWords)： 深部围岩;物理模拟;分区;环向裂隙

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2016YFC0801402);; 安徽省重点研究与开发计划面上攻关资助项目(201904a07020011)

作者(Author): 段昌瑞,郑群,薛俊华,余国锋,罗勇

DOI: 10.13532/j.jmsce.cn10-1638/td.20210520.001

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