Tunnel projects within Karst landscapes are frequently plagued by the unpredictable occurrence of water inrush disasters.Detecting and predicting the emergence of fissure-type water inrushes pose substantial difficulties and convey a high disaster risk.In order to shed light on the mechanisms behind fissure-type Karst water inrushes and delineate potential early warning indicators,grounded in the"fluid-solid-damage"coupling model,both the causative mechanisms and threshold conditions that precipitate fissure-type Karst water inrushes were investigated.By rigorously deriving formulas and conducting comprehensive multi-field coupled numerical analyses,key conclusions are reached as follow.A robust"fluid-solid-damage"coupled mathematical model has been effectively formulated.This model provides a detailed illustration of the disaster mechanisms associated with fissure-type Karst water inrushes,and its feasibility and rationality have been empirically confirmed.The displacement evolution of tunnel vault surrounding rock under different pressure conditions is analyzed which demonstrates a strong correlation between fissure-type Karst water inrushes and increased water pressure within the water-rich solution cavities.Upon assessing the characteristics of the surrounding rock under critical water inrush conditions,a triphasic evolution model characterized by"slow growth-rapid growth-displacement runaway"phases specifically for fissure-type Karst water inrush events has been postulated.
关键词
多场耦合/裂隙型岩溶突涌水/数学模型/力学机制/临界条件
Key words
multi-field coupling/fissure karst water inrush/mathematical model/mechanism/critical conditions
维普
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