| 赵 蕾,邬忠虎,娄义黎,王安礼.裂隙溶洞对隧道围岩稳定性的数值分析[J].江西水利科技,2020,(2): |
| 裂隙溶洞对隧道围岩稳定性的数值分析 |
| Numerical analysis of the stability of the surrounding rock of the tunnel by the crack cave |
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| DOI： |
| 中文关键词: 裂隙溶洞 RFPA 隧道围岩 突水 数值分析 能量 |
| 英文关键词: Fissured karst cave RFPA Tunnel surrounding rock Water inrush Numerical analysis Energy |
| 基金项目: |
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| 中文摘要: |
| 为探究不同充水条件下裂隙溶洞对隧道开挖过程中围岩稳定性的影响，利用RFPA渗流版数值软件对不同裂隙溶洞充水条件下隧道开挖过程进行数值分析.研究表明：裂隙溶洞中水压的存在对围岩稳定性的影响显著，水压在3MPa以下时，随着水压的增大，隧道围岩破坏程度越大，破坏速度越快，渗流路径越复杂，发生的突水灾害越严重.水压的存在影响着隧道围岩破坏过程能量演化规律，当裂隙溶洞中存在低水压（0MPa、1MPa）时，围岩破坏释放的能量表现为平缓-激增-平缓-激增的演化规律.当裂隙溶洞存在高水压（3MPa）时，围岩破坏释放的能量表现为平缓-激增的演化规律.研究结果对岩溶地区隧道施工过程中突水、危石垮塌灾害防控具有指导意义. |
| 英文摘要: |
| In order to explore the influence of fissure karst cave on the stability of surrounding rock in the process of tunnel excavation under different water filling conditions，RFPA seepage version numerical software is used to analyze the process of tunnel excavation under different fissure karst cave water filling conditions.The research shows that the existence of water pressure in the fissure karst cave has a significant impact on the stability of surrounding rock.When the water pressure is below 3Mpa，the greater the damage degree of surrounding rock，the faster the damage speed，the more complex the seepage path，and the more serious the water inrush disaster.The existence of water pressure affects the law of energy evolution in the process of tunnel surrounding rock failure.When there is low water pressure（0mpa，1MPa）in the fractured karst cave，the energy released by surrounding rock failure shows the law of evolution of gentle surge gentle surge.When there is a high water pressure（3Mpa）in the fracture cave，the energy released from the surrounding rock failure shows a gentle-surge evolution law.The research results have guiding significance for the prevention and control of water inrush and dangerous rock collapse in the process of tunnel construction in karst area. |
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