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煤矿动压巷道围岩稳定性协同卸压控制技术研究

王炯 刘鹏 刘帅 马磊 刘义鹏 陈旭

王炯, 刘鹏, 刘帅, 马磊, 刘义鹏, 陈旭. 煤矿动压巷道围岩稳定性协同卸压控制技术研究[J]. 矿业科学学报, 2021, 6(3): 323-332. doi: 10.19606/j.cnki.jmst.2021.03.009
引用本文: 王炯, 刘鹏, 刘帅, 马磊, 刘义鹏, 陈旭. 煤矿动压巷道围岩稳定性协同卸压控制技术研究[J]. 矿业科学学报, 2021, 6(3): 323-332. doi: 10.19606/j.cnki.jmst.2021.03.009
Wang Jiong, Liu Peng, Liu Shuai, Ma Lei, Liu Yipeng, Chen Xu. Study on collaborative pressure relief control technology for surrounding rock stability of dynamic pressure roadway in coal mine[J]. Journal of Mining Science and Technology, 2021, 6(3): 323-332. doi: 10.19606/j.cnki.jmst.2021.03.009
Citation: Wang Jiong, Liu Peng, Liu Shuai, Ma Lei, Liu Yipeng, Chen Xu. Study on collaborative pressure relief control technology for surrounding rock stability of dynamic pressure roadway in coal mine[J]. Journal of Mining Science and Technology, 2021, 6(3): 323-332. doi: 10.19606/j.cnki.jmst.2021.03.009

煤矿动压巷道围岩稳定性协同卸压控制技术研究

doi: 10.19606/j.cnki.jmst.2021.03.009
基金项目: 

国家自然科学基金 52074300

国家重点研发计划 2016YFC0600901

详细信息
    作者简介:

    王炯(1984—),男,安徽蒙城人,副教授,博士,主要从事切顶卸压无煤柱自成巷(110/N00工法)、深井软岩巷道支护及冲击地压机制与防治等方面的教学与研究工作。Tel: 13810192953,E-mail: wangjiong0216@163.com

  • 中图分类号: TD322

Study on collaborative pressure relief control technology for surrounding rock stability of dynamic pressure roadway in coal mine

  • 摘要: 煤矿动压巷道围岩的稳定性对矿井安全生产至关重要。为有效控制采动压力影响下的巷道失稳变形,以德通煤矿2201工作面动压巷道为工程背景,对动压巷道破坏现象及围岩应力演化规律等进行分析,结果表明:开采动压周期性叠加使巷道围岩垂直应力集中并呈双峰拱形非对称分布,巷道变形呈抛物线形,应力集中和位移最大区域巷道易失稳。因此,提出以双向聚能预裂爆破切顶卸压和恒阻大变形锚索让压支护为基础的动压巷道协同卸压围岩稳定性控制技术。对动压巷道实施双向聚能预裂爆破切顶卸压后,可有效切断动压传递路径,巷道峰值应力差降低19.6 %;再实施恒阻大变形锚索让压支护继续卸压,巷道断面收缩率由60 % 降至13 %,开采动压对巷道稳定性的影响明显削弱,协同卸压围岩稳定性控制技术应用效果良好,可为类似矿山提供有益指导。
  • 图  1  2201工作面布置图

    Figure  1.  The layout of Work surface 2201

    图  2  数值计算模型

    Figure  2.  Numerical simulation model

    图  3  垂直应力监测线示意图

    Figure  3.  Schematic diagram of vertical stress monitoring line

    图  4  动压扰动下巷道周边应力变化规律

    Figure  4.  The law of stress variation around roadway under dynamic pressure disturbance

    图  5  应力集中系数

    Figure  5.  Stress concentration factor

    图  6  轨道大巷左帮峰值应力演化规律

    Figure  6.  Evolution law of peak stress on left side of roadway

    图  7  动压影响下轨道大巷位移变化规律

    Figure  7.  The displacement variation rule of roadway under the influence of dynamic pressure

    图  8  动压巷道协同卸压控制技术流程

    Figure  8.  Collaborative pressure relief control technology process of dynamic pressure roadway

    图  9  双向聚能预裂爆破装置简图

    Figure  9.  Two-way cumulative presplitting blasting device diagram

    图  10  切顶前后垂直应力对比

    Figure  10.  Contrast of vertical stress before and after cutting roof

    图  11  切顶前后应力变化情况(第十次开挖)

    Figure  11.  Stress Variation before and after cutting roof (tenth excavation)

    图  12  切缝窥视结果(单位:m)

    Figure  12.  Borehole imaging of the roof cutting (unit: m)

    图  13  恒阻大变形锚索(NPR)支护岩体工作示意图

    Figure  13.  The NPR cable working as a rock support

    图  14  轨道大巷恒阻锚索补强支护示意图

    Figure  14.  Schematic diagram of NPR cable reinforcement support in roadway

    图  15  轨道大巷顶板锚索应力监测

    Figure  15.  Monitoring curve of anchor cable stress on roof

    图  16  轨道大巷变形监测

    Figure  16.  Monitoring curve of roadway deformation

    表  1  岩体物理力学参数

    Table  1.   The physical and mechanical parameters of rock mass

    岩层名称分层厚度/m体积模量/109Pa剪切模量/109Pa内摩擦角/(°)抗拉强度/106Pa密度/103(kg·m-3)内聚力/106Pa
    泥岩4.5810443.02.51.7
    粉砂岩2.51517352.02.59.0
    泥岩2.0810443.02.51.7
    砂质泥岩1.599303.72.41.7
    粉砂岩4.51517352.02.59.0
    泥岩1.5810443.02.51.7
    煤层6.812300.71.41.1
    砂质泥岩5.099303.72.41.7
    泥岩6.0810443.02.51.7
    下载: 导出CSV
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  • 收稿日期:  2021-03-05
  • 修回日期:  2021-04-30
  • 刊出日期:  2021-06-01

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