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MODFLOW-CFPv2模型在岩溶隧道突涌水及对地下水环境影响中的应用: 以云南鹤庆锰矿沟岩溶水系统为例

肖竞 万军伟 成建梅 李仲夏 余杭 李槿鸿 袁帅

肖竞, 万军伟, 成建梅, 李仲夏, 余杭, 李槿鸿, 袁帅. MODFLOW-CFPv2模型在岩溶隧道突涌水及对地下水环境影响中的应用: 以云南鹤庆锰矿沟岩溶水系统为例[J]. 地质科技通报, 2024, 43(3): 301-310. doi: 10.19509/j.cnki.dzkq.tb20230072
引用本文: 肖竞, 万军伟, 成建梅, 李仲夏, 余杭, 李槿鸿, 袁帅. MODFLOW-CFPv2模型在岩溶隧道突涌水及对地下水环境影响中的应用: 以云南鹤庆锰矿沟岩溶水系统为例[J]. 地质科技通报, 2024, 43(3): 301-310. doi: 10.19509/j.cnki.dzkq.tb20230072
XIAO Jing, WAN Junwei, CHENG Jianmei, LI Zhongxia, YU Hang, LI Jinghong, YUAN Shuai. Application of MODFLOW-CFPv2 model in karst tunnel water inrush and its impact on groundwater environment: Example of the Mengkuanggou karst water system in Heqing County, Yunnan Province[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 301-310. doi: 10.19509/j.cnki.dzkq.tb20230072
Citation: XIAO Jing, WAN Junwei, CHENG Jianmei, LI Zhongxia, YU Hang, LI Jinghong, YUAN Shuai. Application of MODFLOW-CFPv2 model in karst tunnel water inrush and its impact on groundwater environment: Example of the Mengkuanggou karst water system in Heqing County, Yunnan Province[J]. Bulletin of Geological Science and Technology, 2024, 43(3): 301-310. doi: 10.19509/j.cnki.dzkq.tb20230072

MODFLOW-CFPv2模型在岩溶隧道突涌水及对地下水环境影响中的应用: 以云南鹤庆锰矿沟岩溶水系统为例

doi: 10.19509/j.cnki.dzkq.tb20230072
基金项目: 

国家自然科学基金项目 42172278

国家自然科学基金项目 U1911205

云南省滇中引水工程建设管理局招标项目"云南省滇中引水工程昆明玉溪红河段地下水监测" 

详细信息
    作者简介:

    肖竞, E-mail: a1075223028@163.com

    通讯作者:

    万军伟, E-mail: wanjw@cug.edu.cn

  • 中图分类号: U453.6;P641.2

Application of MODFLOW-CFPv2 model in karst tunnel water inrush and its impact on groundwater environment: Example of the Mengkuanggou karst water system in Heqing County, Yunnan Province

More Information
  • 摘要:

    滇中地区构造复杂、岩溶发育, 隧洞突涌水及泉流量衰减是隧洞施工过程中最棘手的问题之一。锰矿沟岩溶水系统岩溶管道化程度高, 岩溶裂隙与岩溶管道2种含水介质差异显著。采用MODFLOW-CFPv2双重介质数值模型对锰矿沟岩溶水系统展开数值模拟研究, 精细刻画岩溶管道与引水隧洞, 进而掌握隧洞施工对地下水流场影响以及泉流量变化的规律。结果表明: (1)MODFLOW-CFPv2模型能够刻画岩溶地区复杂的地质结构, 较好地模拟研究区地下水位的动态特征和岩溶泉流量响应特征。(2)在强排工况下隧洞单位长度最大涌水量为164 m3/(d·m), 单位长度稳定涌水量为69 m3/(d·m), 锰矿沟岩溶泉流量也出现显著下降的趋势, 在模拟期内平均泉流量从天然条件下1 578 L/s下降至1 098 L/s, 总体减少了30.4%;峰值泉流量从2 133 L/s下降至1 375 L/s, 减少了35.5%, 强排工况施工会对隧洞工程施工和地下水环境造成显著影响; 限排工况下隧洞单位长度最大涌水量为39 m3/(d·m), 单位长度稳定涌水量为24 m3/(d·m), 隧洞单位长度涌水量显著降低, 锰矿沟岩溶泉流量的下降趋势也得到了一定程度的改善, 模拟期内平均泉流量降低至1 284 L/s, 减少了18.6%, 峰值泉流量降低至1 617 L/s, 减少了22.1%。采用的MODFLOW-CFPv2双重介质模型具有较精确刻画岩溶区管道、溶洞、裂隙共存的高度非均质岩溶水系统的能力, 能够定量评价香炉山隧洞施工对锰矿沟岩溶水系统地下水流场及泉流量的影响, 为香炉山隧洞工程的突涌水灾害防治提供参考依据, 也为岩溶地区复杂地质条件下地下水研究提供借鉴经验。

     

  • 图 1  云南省香炉山隧洞区域岩溶水系统分布图

    Figure 1.  Distribution map of the karst water system in the Xianglushan Tunnel area, Yunnan Province

    图 2  云南鹤头锰矿沟岩溶水系统水文地质略图

    Figure 2.  Hydrogeological sketch of the Mengkuanggou karst water system in Heqing County, Yunnan Province

    图 3  MODFLOW-CFPv2模型示意图

    Figure 3.  Schematic of the MODFLOW-CFPv2 model

    图 4  数值模型图

    Figure 4.  Numerical model illustration

    图 5  初始等水位线图

    Figure 5.  Centour map of initial water level

    图 6  观测孔水位拟合曲线

    Figure 6.  Fitting curve of borehole water level

    图 7  锰矿沟泉流量拟合曲线

    Figure 7.  Fitting curve of the Mengkuanggou spring flow

    图 8  天然及引水隧洞不同施工工况条件下锰矿沟泉流量变化曲线

    Figure 8.  Changes in the Mengkuanggou spring flow under different construction conditions of natural and diversion tunnels

    图 9  地下水水位降深等值线图

    Figure 9.  Contour map of groundwater level drawdown

    表  1  研究区含水层概化

    Table  1.   Aquifer generalization in the study area

    概化层 岩性 厚度/m 含水层特性
    第一层 灰岩、白云质灰岩和白云岩 300~1 000 岩溶裂隙水含水层
    第二层 泥质灰岩夹少量粉砂岩及页岩、砂岩 90~120 裂隙水或岩溶
    裂隙水含水层
    第三层 玄武岩 200~500 裂隙水含水层
    下载: 导出CSV

    表  2  模型参数设置

    Table  2.   Model parameter settings

    基岩参数 水平渗透系数/(m·d-1) 垂向渗透系数/(m·d-1) 重力给水度 弹性给水度/m-1 降雨入渗系数
    第一层 补给区 0.15 0.035 0.05 / 0.38
    径流区 0.2 0.02 0.06 / 0.36
    排泄区 0.3 0.03 0.07 / 0.33
    第二层 补给区 0.03 0.006 0.02 0.000 1 /
    径流区 0.04 0.005 0.03 0.000 15 /
    排泄区 0.05 0.004 0.04 0.000 2 /
    第三层 补给区 0.01 0.003 0.007 0.000 1 /
    径流区 0.02 0.002 0.008 0.000 1 /
    排泄区 0.03 0.001 0.01 0.000 1 /
    管道参数 直径/m 下雷诺数 上雷诺数 粗糙度/m 管壁交换系数/(m2·d-1)
    上游段(Ⅰ) 0.9 2 300 4 000 0.000 1 2
    中游段(Ⅱ) 1.0 2 300 4 000 0.000 1 6
    下游段(Ⅲ) 1.1 2 300 4 000 0.000 1 8
    下载: 导出CSV

    表  3  不同施工工况隧洞单位长度涌水量预测汇总

    Table  3.   Summary of the tunnel water inflow predictions under different construction conditions

    施工工况 限排工况 强排工况
    单位长度涌水量/(m3·d-1·m-1) 最大 稳定 最大 稳定
    39 24 164 69
    下载: 导出CSV
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  • 收稿日期:  2023-02-15
  • 录用日期:  2023-06-30
  • 修回日期:  2023-06-23

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