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突水矿井动水巷道骨料灌注截流可视化平台研制与试验研究

牟林

牟林. 突水矿井动水巷道骨料灌注截流可视化平台研制与试验研究[J]. 煤田地质与勘探, 2021, 49(5): 156-166. doi: 10.3969/j.issn.1001-1986.2021.05.017
引用本文: 牟林. 突水矿井动水巷道骨料灌注截流可视化平台研制与试验研究[J]. 煤田地质与勘探, 2021, 49(5): 156-166. doi: 10.3969/j.issn.1001-1986.2021.05.017
MOU Lin. Experimental study on visual system for water-blocking process of hydrodynamic roadway by aggregate pouring in water inrush mine[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(5): 156-166. doi: 10.3969/j.issn.1001-1986.2021.05.017
Citation: MOU Lin. Experimental study on visual system for water-blocking process of hydrodynamic roadway by aggregate pouring in water inrush mine[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(5): 156-166. doi: 10.3969/j.issn.1001-1986.2021.05.017

突水矿井动水巷道骨料灌注截流可视化平台研制与试验研究

doi: 10.3969/j.issn.1001-1986.2021.05.017
基金项目: 

国家重点研发计划课题 2017YFC0804106

中煤科工集团西安研究院有限公司科技创新基金项目 2019XAYMS22

详细信息
    第一作者:

    牟林,1985年生,男,湖北松滋人,博士,副研究员,从事煤矿水害防治研究工作. E-mail:258323938@qq.com

  • 中图分类号: TD741

Experimental study on visual system for water-blocking process of hydrodynamic roadway by aggregate pouring in water inrush mine

  • 摘要: 通过骨料灌注法进行动水巷道截流堵水是矿井淹没后进行救援和复矿的重要方法。为研究骨料灌注截流堵水机理,基于水头高度、流速、巷道尺寸、倾角、糙度、骨料粒径、灌注速度等因素建立大型骨料灌注截流试验平台,并依托平台进行单孔、多孔灌注试验,分析动水巷道骨料运移堆积规律。结果表明:骨料正常灌注期间堆积体具有向下游运移生长的特性,迎水面和背水面由涡流控制的坡脚形态存在差异化现象;低流速条件下骨料会快速接顶且孔间存在空腔,高流速条件下孔间堆积体逐渐接龙、灌注量在下游相互叠加;残余过水通道沿截面呈U形分布,存在扰流接顶效应、空气掏蚀效应、堵孔效应、溃坝冲刷效应等典型动力学现象;结合解析法和数值法,对骨料颗粒的起动速度及典型现象进行计算和模拟,验证了试验平台的可靠性;通过浆液灌注实验验证浆液配比和骨料粒径对注浆效果存在重要影响,浆液在骨料堆积体中存在“上多下少”的空间分带性。试验平台的研制对截流堵水工程技术优化具有指导意义。

     

  • 图  阻水墙施工过程

    Fig. 1  Construction process of water blocking wall

    图  突水及治理模型

    Fig. 2  Diagram of water inrush and control model

    图  试验平台系统功能分区

    1—可变水位定水头水箱;2—流量表;3—压力传感器;4—升降调节装置;5—骨料灌注料斗;6—进料孔;7—数据采集设备;8—计算机;9—循环水泵;10—照相机;11—模拟巷道系统;12—进水口;13—备用孔

    Fig. 3  Functional zoning of test platform system

    图  平台装配情况及糙度模拟装置

    Fig. 4  Platform assembly and roughness simulation device

    图  粒径1~2 mm与0.1~0.2 mm骨料在不同坡度堆积形态的演化过程

    Fig. 5  Accumulation morphology evolution of 1-2 mm and 0.1-0.2 mm particle size in different gradient

    图  迎水与背水坡面形态(0.2~0.4 mm)

    Fig. 6  Morphology of upstream and downstream slope (0.2-0.4 mm)

    图  孔间接龙及灌注量叠加效应

    Fig. 7  Connection between holes and superposition effect of pouring volume

    图  光滑型巷道残余过水通道空间形态

    Fig. 8  Morphology of residual water passage in smooth pathway

    图  粗糙型巷道残余过水通道空间形态

    Fig. 9  Morphology of residual water passage in rough pathway

    图  10  空气进入后对流场及堆积形态的影响

    Fig. 10  Transformation of flow field and accumulation morphology after air entering

    图  11  沙粒的吸水聚团作用及孔底堵孔现象

    Fig. 11  Water absorption cluster phenomenon and hole plugging at the bottom

    图  12  下游主动放水卸压瞬间的水动力学现象

    Fig. 12  Hydrodynamic phenomena during downstream pressure relief

    图  13  上下游水头差响应过程曲线

    Fig. 13  Water head difference curves during aggregate perfusion

    图  14  骨料灌注过程现象的数值模拟

    Fig. 14  Numerical simulation of aggregate pouring process

    图  15  各阶段流态空间分布特征

    Fig. 15  Flow pattern distribution in different stages

    图  16  水泥浆液在骨料中的渗透现象

    Fig. 16  Penetration of cement slurry in aggregate

    表  1  相似模型参数取值

    Table  1  Calculation parameter of similitude model

    相似类型 项目 相似比
    几何相似 长度 0.05
    糙度 0或0.05
    运动相似 速度 0.22
    时间 0.23
    流量 5.5×10–4
    运动黏度 1
    动力相似 压强 0.05
    密度 1
    动力黏度 1
    重力相似 重力加速度 1
    重力 1.25×10–4
    压力相似 压力 1.25×10–4
    下载: 导出CSV

    表  2  不同工况下残余通道流速统计

    Table  2  Residual channel velocity under different working conditions

    粒径/mm 起动流速v/(m·s–1) 倾斜角度(向上流动为正)
    –8°
    dicm mi/(kg·s–1) Q/(m·s–1) v/(m·s–1) di/cm mi/(kg·s–1) Q/(m·s–1) v/(m·s–1) di/cm mi/(kg·s–1) Q/(m·s–1) v/(m·s–1)
    2~4 0.36~0.70 3.2 0.016 13.5 0.59 2.71 0.016 13.0 0.67 2.50 0.016 13.5 0.75
    1~2 0.3~0.55 2.69 0.019 12.0 0.62 2.27 0.019 12.0 0.73 2.30 0.019 13.0 0.79
    0.5~1.0 0.25~0.42 3.07 0.026 12.5 0.57 2.99 0.022 13.5 0.63 2.83 0.044 14.7 0.72
    0.2~0.4 0.20~0.34 3.36 0.080 13.5 0.56 3.20 0.070 13.0 0.56 3.31 0.075 15.0 0.63
    0.1~0.2 0.20~0.28 4.43 0.085 13.5 0.42 4.06 0.093 12.5 0.43 3.05 0.096 14.0 0.64
      注:画下横线数据为射流工况下的结果。
    下载: 导出CSV
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  • 收稿日期:  2021-03-30
  • 修回日期:  2021-07-06
  • 发布日期:  2021-10-25
  • 网络出版日期:  2021-11-06

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