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垮塌区Navier-Stokes幂律型浆体的有效扩散范围

文磊 罗周全 秦亚光 汪伟 郑开欢

文磊, 罗周全, 秦亚光, 汪伟, 郑开欢. 垮塌区Navier-Stokes幂律型浆体的有效扩散范围[J]. 西南交通大学学报, 2020, 55(1): 193-201. doi: 10.3969/j.issn.0258-2724.20180331
引用本文: 文磊, 罗周全, 秦亚光, 汪伟, 郑开欢. 垮塌区Navier-Stokes幂律型浆体的有效扩散范围[J]. 西南交通大学学报, 2020, 55(1): 193-201. doi: 10.3969/j.issn.0258-2724.20180331
WEN Lei, LUO Zhouquan, QIN Yaguang, WANG Wei, ZHENG Kaihuan. Effective Diffusion Range of Exponential Fluids Based on Navier-Stokes Equation in Collapse Area[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 193-201. doi: 10.3969/j.issn.0258-2724.20180331
Citation: WEN Lei, LUO Zhouquan, QIN Yaguang, WANG Wei, ZHENG Kaihuan. Effective Diffusion Range of Exponential Fluids Based on Navier-Stokes Equation in Collapse Area[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 193-201. doi: 10.3969/j.issn.0258-2724.20180331

垮塌区Navier-Stokes幂律型浆体的有效扩散范围

doi: 10.3969/j.issn.0258-2724.20180331
基金项目: 国家“十三五”重点研发计划课题(2017YFC0602901)
详细信息
    作者简介:

    文磊(1988—)男,博士研究生,研究方向为采矿工程和矿山岩石力学,E-mail:821149277@qq.com

  • 中图分类号: TV139.16

Effective Diffusion Range of Exponential Fluids Based on Navier-Stokes Equation in Collapse Area

  • 摘要: 为了研究注浆过程水泥浆体在破碎岩体中的扩散范围和压力分布状态,以Navier-Stokes方程为理论基础,在COMSOL平台上建立单裂隙模型,模拟浆体在不规则的单一裂隙面上的流动特征. 在此基础上,建立破碎岩体的平面裂隙模型,同时设置不同的贯通系数,模拟浆体在破碎岩体中的扩散规律. 研究结果表明:当模型中裂隙贯通系数较低时(0.1~0.5),浆体有效扩散范围较小,约为1.5~4.1 m,扩散范围随着压差的增加呈非线性的增加,但是增加率快速降低接近0;当模型中裂隙贯通系数较大时(0.5~1.0),浆体的有效扩散范围显著增加,约为4.1~6.2 m,随着压差的增加也呈非线性增加,增加率呈降低的趋势;当模型中裂隙贯通系数为1.0时,即破碎的岩体中裂隙面全部连通状态,浆体扩散距离随着压差的增加近似呈线性增加,最大扩散距离约为6.2 m. 同时在注浆孔外围6 m处取芯结果能明显观察到浆体固结的破碎岩块,这与模型计算结果一致.

     

  • 图 1  变形模式

    Figure 1.  Deformation modes

    图 2  主矿体开采垮塌范围示意

    Figure 2.  Schematic of the mining collapse range of the main ore body

    图 3  主矿体垮塌区滑移面z向应变云图

    Figure 3.  z direction strain cloud map of slip surface in the collapse area of the main ore body

    图 4  注浆孔结构示意

    Figure 4.  Schematic of grouting hole structure

    图 5  注浆结构示意

    Figure 5.  Structural schematic of grouting

    图 6  注浆体在不规则裂隙表面的流动速度

    Figure 6.  Flow velocity of a grouting slurry on an irregular fissure surface

    图 7  浆体在连通(贯通系数为1)的微裂隙中的流动速度平面矢量图

    Figure 7.  Plane vector graph of the slurry flow velocity in connected micro fissures with a penetration coefficient of 1

    图 8  浆体扩散过程中压差等值线图(贯通系数为1)

    Figure 8.  Pressure drop contour map of slurry diffusion with a penetration coefficient of 1

    图 9  不同裂隙贯穿系数的压差-扩散范围变化曲线

    Figure 9.  Pressure difference-diffusion range curves for different crack penetration coefficients

    表  1  透水率测试表

    Table  1.   Permeability test results

    序号位置孔号试验压力/MPa试验段长/m吕荣值/Lu
    1 Zk1 0.6 16 69.5
    2 Zk2 0.6 17 92.0
    3 Zk3 0.6 21 118.0
    平均值 0.6 18 93.167
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  • 收稿日期:  2018-04-23
  • 修回日期:  2018-11-05
  • 网络出版日期:  2018-12-21
  • 刊出日期:  2020-02-01

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