• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
深部特厚煤层对采对掘巷道围岩综合应力场演化研究
  • Title

    Research on evolution of integrated stress field of surrounding rock of mining while digging opposite roadway in deep and ultra-thick coal seam

  • 作者

    姜鹏飞

  • Author

    JIANG Pengfei

  • 单位

    中煤科工开采研究院有限公司天地科技股份有限公司开采设计事业部煤炭科学研究总院 开采设计研究分院

  • Organization
    1.CCTEG Coal Mining Research Institute,Beijing ,China;2.Coal Mining and Design Department,Tiandi Science & Technology Co.,Ltd.,Beijing ,China;3.Coal Mining Branch,China Coal Research Institute,Beijing ,China
  • 摘要

    深部特厚煤层对采对掘巷道受高应力及多次强烈采动影响,应力环境复杂,围岩控制难度大,井下综合应力场演化对于巷道支护方式及参数的确定有益。以麻家梁煤矿14103辅运副巷为工程背景,采用井下实测、理论分析和数值模拟方法,揭示巷道围岩原岩应力场、采动应力场、支护应力场及位移场演化规律。实测得出麻家梁煤矿巷道围岩原岩应力场分布特征;揭示出相邻工作面回采滞后采动影响阶段是巷道围岩采动应力增加的主要阶段;锚杆锚索施加高支护应力可在围岩中形成稳定承载结构。基于应力场、位移场综合分析,得出14103辅运副巷围岩采动应力增加先于巷道变形的增加;受二次采动应力作用,围岩发生扩容变形,出现应力增加不明显而变形显著增大的现象,揭示出采动应力场、支护体受力及位移场时空演化相互关系。该结果对巷道布置方式及支护方案提供了依据。

  • Abstract
    Affected by high stress and multiple strong mining,the stress environment of the surrounding rock of mining while digging opposite roadway in deep ultra-thick coal seam is complicated and the roadway surrounding rock control is difficult; therefore,it is of vital significance for choosing roadway support methods and parameters to obtain the real stress evolution feature underground.Taking the auxiliary Transportation Lane 14103 of Majialiang Coal Mine as the engineering background,this paper revealed the evolution feature of in-situ stress field,mining induced stress field,support stress field and displacement filed of the roadway surrounding rock through underground onsite monitoring,theoretical analysis and numerical simulation.The distribution characteristics of the in-situ stress field of the roadway surrounding rock at Majialiang coal mine was obtained through the onsite monitoring; the onsite mining induced stress field monitoring showed that the lagging influence of the mining of the adjacent working face resulted in the main period of the mining induced stress increase; the pre-tightened bolts and cable bolts formed stable load bearing structure surrounding the roadway.Based on the comprehensive analysis of the stress field and displacement field evolution,it was concluded that the increase of the mining stress of the surrounding rock of the No.14103 auxiliary transportation lane occurred before the increase of the roadway deformation,the surrounding rock dilatancy and deformation happened due to the second mining stress influence,which resulted in the phenomenon of unobvious stress increase and significant deformation increase,and the temporal and spatial revolution and interrelation of the mining-induced stress field,support body stress and displacement field were revealed.The research outcomes provided the basis for choosing the roadway layout and support pattern.
  • 关键词

    特厚煤层深部巷道对采对掘巷道综合应力场演化

  • KeyWords

    ultra-thick coal seam;deep roadway;mining while digging opposite roadway;integrated stress field evolution

  • 文章目录

    0 引言
    1 矿井地质条件分析
    2 综合应力场演化分析
    2.1 原岩应力场分布实测分析
    2.2 采动应力场演化实测分析
    2.2.1 14102工作面采动影响阶段
    2.2.2 14103工作面超前采动影响阶段
    2.3 支护应力场演化分析
    3 基于综合应力场演化的巷道变形特征
    4 综合应力场演化及与位移场相互关系
    5 结论

  • 引用格式
    姜鹏飞.深部特厚煤层对采对掘巷道围岩综合应力场演化研究[J].煤炭科学技术,2020,48(8):26-36.
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主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

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