郭佳奇, 王二博, 赖永标,等.岩溶隧道断续裂隙掌子面突水过程三维离散元分析[J].河南理工大学学报（自然科学版）,2023,42(4):156-161.

GUO J Q, WANG E B, LAI Y B ,et al.Three-dimensional discrete element analysis of the water inrush process of the intermittent fissure tunnel face in a karst tunnel[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):156-161.

岩溶隧道断续裂隙掌子面突水过程三维离散元分析

郭佳奇1, 王二博1, 赖永标2, 杨卫领1

1.河南理工大学  土木工程学院，河南 焦作  454000;2.中建铁路投资建设集团有限公司，北京  102601

摘要:为探究岩溶隧道在开挖过程中处于不同倾角断续裂隙下防突结构位移、渗流场和岩溶水压的变化规律，运用三维离散元软件进行数值模拟分析研究。构建岩溶隧道断续裂隙掌子面突水计算模型，模拟分析了隧道发生突水灾害时，防突岩体的多元物理信息变化过程。结果表明：隧道掌子面的最大位移点通常位于裂隙和隧道掌子面的交界处；当裂隙倾角从20°增至45°时，水压不断增大；倾角从45°增至70°时，各位置处的水压逐渐减小；随着岩溶裂隙倾角不断增大，岩溶水在裂隙中的最大流速先减小后增加。研究结果可为岩溶隧道突水防控提供指导作用。

关键词:岩溶隧道;断续裂隙;突水;裂隙倾角;三维离散元

doi:10.16186/j.cnki.1673-9787.2021050020

基金项目:国家自然科学基金资助项目（51778215）

收稿日期:2021/05/07

修回日期:2021/07/25

出版日期:2023/07/25

Three-dimensional discrete element analysis of the water inrush process of the intermittent fissure tunnel face in a karst tunnel

GUO Jiaqi1, WANG Erbo1, LAI Yongbiao2, YANG Weiling1

1.School of Civil Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.China Construction Railway Investment Construction Group Co.，Ltd.，Beijing  102601，China

Abstract:In order to explore the changes laws in the displacement，seepage field and karst water pressure of the anti-outburst structure under the intermittent fissure with different inclination angles during the excavation of the karst tunnel，numerical simulation analysis and research were carried out by using three-dimensional discrete element software.A calculation model of water inrush from the face of intermittent fissure in a karst tunnel was constructed，and the change process of multiple physical informations of the anti-outburst rock mass was simulated and analyzed when a water inrush disaster occured in the tunnel.The results showed that the maximum displacement point of the tunnel face was usually located at the junction of the crack and the tunnel face；When the inclination angle of the fissure increased from 20° to 45°，the water pressure presented an increasing trend，and the inclination angle increased from 45°to 70°，the water pressure value at each position gradually decreased；As the inclination angle of the karst fissure increased，the maximum flow velocity of karst water in the fissure first decreased and then increased.The research results could provide guidance for the prevention and control of water inrush in karst tunnels.

Key words:karst tunnel;intermittent fissure;waterinrush;inclination angle of the fissure;three-dimensional discrete element

岩溶隧道断续裂隙掌子面突水过程三维离散元分析_郭佳奇.pdf