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沿空留巷采空区自动化密闭系统

聂百胜 夏晓峰 周皓文 秦枫

聂百胜,夏晓峰,周皓文,等. 沿空留巷采空区自动化密闭系统[J]. 工矿自动化,2024,50(6):16-22.  doi: 10.13272/j.issn.1671-251x.2024040042
引用本文: 聂百胜,夏晓峰,周皓文,等. 沿空留巷采空区自动化密闭系统[J]. 工矿自动化,2024,50(6):16-22.  doi: 10.13272/j.issn.1671-251x.2024040042
NIE Baisheng, XIA Xiaofeng, ZHOU Haowen, et al. Automatic sealing system for goaf along gob-side entry retaining[J]. Journal of Mine Automation,2024,50(6):16-22.  doi: 10.13272/j.issn.1671-251x.2024040042
Citation: NIE Baisheng, XIA Xiaofeng, ZHOU Haowen, et al. Automatic sealing system for goaf along gob-side entry retaining[J]. Journal of Mine Automation,2024,50(6):16-22.  doi: 10.13272/j.issn.1671-251x.2024040042

沿空留巷采空区自动化密闭系统

doi: 10.13272/j.issn.1671-251x.2024040042
基金项目: 国家重点研发计划项目(2022YFC3004701)。
详细信息
    作者简介:

    聂百胜(1973—),男,山西运城人,教授,博士研究生导师,博士,研究方向为煤岩瓦斯动力灾害预防理论与技术等,E-mail:bshnie@cqu.edu.cn

  • 中图分类号: TD712

Automatic sealing system for goaf along gob-side entry retaining

  • 摘要: 现有的沿空留巷采空区密闭方法大多集中于构筑密闭墙及封堵墙体裂隙,施工周期较长且反复进行,消耗大量人力成本,自动化程度低,易发生二次破坏。针对上述问题,设计了一种沿空留巷采空区自动化密闭系统。该系统以柔性密闭气囊为载体,将未充气的气囊置于采空区密闭墙和单体液压支柱之间,对气囊充气使其与沿空留巷顶底板及采空区密闭墙外侧贴合接触;智能感知矿压显现导致的巷道围岩变形,气囊随时变化形状柔性应对,即当气囊内部压力上升并超过安全泄压阀额定压力时,自动释放气囊气体缩小体积,以重新与顶底板围岩紧密贴合,达到持续密闭采空区的效果,抑制采空区危险气体泄漏。现场试验结果表明:安全泄压阀在柔性密闭气囊内部压力达到约4 kPa时正常开启,压力达到2.7 kPa左右停止泄气;柔性密闭装备感知压力变化后收缩体积以重新适应围岩形态,可长时间并持续性地密闭采空区;柔性密闭装备安装后与采空区密闭墙贴合度高,密闭墙墙体前瓦斯体积分数降低0.13%,有效抑制了瓦斯溢出。

     

  • 图  1  沿空留巷采空区自动化密闭系统原理

    Figure  1.  Principle of automatic sealing system for goaf along gob-side entry retaining

    图  2  沿空留巷采空区自动化密闭系统连接方式

    Figure  2.  Connection of automatic sealing system for goaf along gob-side entry retaining

    图  3  沿空留巷采空区自动化密闭系统自适应压力释放原理

    Figure  3.  Adaptive pressure release principle of automatic sealing system for goaf along gob-side entry retaining

    图  4  单个柔性密闭气囊充气密闭试验系统连接

    Figure  4.  Connection of single flexible airbag inflatable airtight test system

    图  5  沿空留巷不同高度处柔性密闭气囊压力随时间的变化

    Figure  5.  The change of flexible airbag pressure with time at different heights of gob-side entry retaining

    图  6  多个柔性密闭气囊持续充气密闭试验系统连接

    Figure  6.  Connection of multiple flexible airbags inflatable airtight test system

    图  7  柔性密闭气囊持续充气时压力变化曲线

    Figure  7.  Pressure change curve of flexible airbag with continuous inflation

    图  8  柔性密闭后密闭墙墙体前瓦斯体积分数变化

    Figure  8.  Gas volume fraction change in front of sealing wall after flexible sealing

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出版历程
  • 收稿日期:  2024-04-13
  • 修回日期:  2024-06-28
  • 网络出版日期:  2024-07-04

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