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基于滑移线场理论的巷道底鼓机理与防治技术研究

程辉 赵洪宝 徐建峰 秦逢缘 张一潇 胡林枫

程辉, 赵洪宝, 徐建峰, 秦逢缘, 张一潇, 胡林枫. 基于滑移线场理论的巷道底鼓机理与防治技术研究[J]. 矿业科学学报, 2021, 6(3): 314-322. doi: 10.19606/j.cnki.jmst.2021.03.008
引用本文: 程辉, 赵洪宝, 徐建峰, 秦逢缘, 张一潇, 胡林枫. 基于滑移线场理论的巷道底鼓机理与防治技术研究[J]. 矿业科学学报, 2021, 6(3): 314-322. doi: 10.19606/j.cnki.jmst.2021.03.008
Cheng Hui, Zhao Hongbao, Xu Jianfeng, Qin Fengyuan, Zhang Yixiao, Hu Linfeng. Study on floor heave mechanism and control technology of roadway based on slip line field theory[J]. Journal of Mining Science and Technology, 2021, 6(3): 314-322. doi: 10.19606/j.cnki.jmst.2021.03.008
Citation: Cheng Hui, Zhao Hongbao, Xu Jianfeng, Qin Fengyuan, Zhang Yixiao, Hu Linfeng. Study on floor heave mechanism and control technology of roadway based on slip line field theory[J]. Journal of Mining Science and Technology, 2021, 6(3): 314-322. doi: 10.19606/j.cnki.jmst.2021.03.008

基于滑移线场理论的巷道底鼓机理与防治技术研究

doi: 10.19606/j.cnki.jmst.2021.03.008
基金项目: 

越崎杰出学者计划 800015Z1179

国家自然科学基金 51474220

中央高校基本科研业务费专项资金 2020YJSNY07

详细信息
    作者简介:

    程辉(1996—),男,广西梧州人,博士研究生,主要从事矿山岩体力学与巷道围岩控制等方面的研究工作。Tel: 18810019869,E-mail: hui1280@126.com

    通讯作者:

    赵洪宝(1980—),男,山东德州人,教授,博士生导师,主要从事矿山岩体力学等方面的教学与研究工作。Tel: 13426079538,E-mail: hongbaozhao@126.com

  • 中图分类号: TD3

Study on floor heave mechanism and control technology of roadway based on slip line field theory

  • 摘要: 基于滑移线场理论对巷道底板岩层建立滑移线场模型,以山西焦煤回坡底煤矿1021巷为工程背景,研究了巷道非对称性底鼓机理,并提出了合理的底鼓防治技术。研究结果表明,巷道底板滑移线应力场中存在均匀应力场与非均匀应力场,从两帮往巷道中心线处,底板应力逐渐减小;底板滑移线主动区速度垂直向下,过渡区受主动区挤压而发生旋转并挤压被动区,被动区向上运动,从而产生巷道底鼓现象。回坡底煤矿1021巷由于受到孤岛煤柱应力集中作用,巷道两帮支承压力呈非对称分布,靠近煤柱一侧的高支承压力在底板形成滑移线场,其速度场方向指向远离煤柱一侧巷帮,因此1021巷底鼓现象具有明显的非对称性分布特征,远离煤柱一侧底鼓量较大。针对1021巷滑移型底鼓特征,采用单体锚索平行布置的非对称性支护进行巷道底鼓防治,现场应用效果良好。
  • 图  1  底板滑移线场模型

    Figure  1.  Floor slip line field model

    图  2  数值模型岩层分布

    Figure  2.  Numerical model of strata distribution

    图  3  滑移线速度场模拟结果

    Figure  3.  Simulation results of slip line velocity field

    图  4  工作面与巷道位置布置图

    Figure  4.  Layout of working face and roadway

    图  5  数值模拟计算模型

    Figure  5.  Numerical simulation model

    图  6  孤岛煤柱支承压力分布结果

    Figure  6.  Abutment pressure distribution results of isolated coal pillar

    图  7  孤岛煤柱引起的底板垂直应力分布

    Figure  7.  Vertical stress distribution of floor caused by island coal pillar

    图  8  巷道两帮支承压力分布规律

    Figure  8.  Distribution law of abutment pressure on both sides of roadway

    图  9  1021巷底板滑移线场模型

    Figure  9.  Slip line field model of 1021 roadway floor

    图  10  Mohr-Coulomb准则

    Figure  10.  Mohr Coulomb criterion

    图  11  1021巷道底板破坏云图

    Figure  11.  1021 roadway floor failure

    图  12  1021巷底鼓防治方案

    Figure  12.  Prevention and control scheme of roadway floor heave

    图  13  巷道底板支护后整体效果

    Figure  13.  Effect of roadway floor support

    表  1  岩层物理力学参数

    Table  1.   Rock physical and mechanical parameters

    岩性密度/(kg·m-3)体积模量/GPa剪切模量/GPa抗拉强度/MPa黏聚力/MPa内摩擦角/(°)
    粉砂岩2 6004.402.902.003.1528
    中细砂岩2 7506.744.353.153.533
    油页岩2 1401.530.761.601.222
    煤层2 0002.581.191.281.535
    泥岩2 3601.360.640.500.820
    中细砂岩2 7506.744.352.203.533
    下载: 导出CSV

    表  2  回坡底煤矿岩层物理力学参数

    Table  2.   Rock physical and mechanical parameters of Huipodi coal mine

    岩层厚度/m密度/(kg·m-3)体积模量/GPa剪切模量/GPa黏聚力/MPa抗拉强度/MPa内摩擦角/(°)
    上覆岩层462 46010.808.137.805.4038
    粉砂岩82 6805.604.25.201.4029
    K2灰岩8.92 8005.574.535.403.8027
    9号煤层11 4002.080.541.200.6420
    泥岩2.32 6002.911.502.002.1032
    10号煤层2.651 4202.501.722.001.0021
    粉砂岩2.822 6805.604.205.101.4029
    泥岩3.82 4616.083.473.000.6028
    11号煤层3.21 4232.501.722.401.2029
    铝质泥岩0.82 1002.601.802.652.0025
    泥岩32 4616.083.473.000.6028
    粉砂岩2.532 6805.604.205.101.4029
    铝质泥岩32 9812.171.002.400.9025
    石英砂岩22 6503.051.924.301.6027
    粉砂岩102 6805.574.205.101.4029
    下部岩体352 6805.604.185.201.5030
    下载: 导出CSV
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  • 收稿日期:  2020-11-13
  • 修回日期:  2021-01-20
  • 刊出日期:  2021-06-01

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