【摘要】：富水環(huán)境中巖體巷道的長期穩(wěn)定性與水的滲流、巖體流變等因素緊密相關。文章假設圍巖蠕變行為服從Norton-Hoff定律,建立水下巖巷擾動區(qū)蠕變的計算模型,并利用Laplace變換以及有效應力原理解答水下巖巷受力與變形的時效問題;在Norton-Hoff解法基礎上獲得了與時間相關的水下巖巷變形計算式,并對擾動區(qū)的蠕變變形進行參數敏感性分析。研究表明:隨著巖石黏滯系數的增大,巖巷蠕變變形逐漸減小,呈現非線性特性;水力傳導系數僅對深處圍巖的時效變形產生影響,增大該系數,巖巷圍巖深處任一點位的位移分布增大。該研究可為更復雜的水下巖巷蠕變變形的數值計算提供理論參考。
[Abstract]:The long-term stability of the rock roadway in the rich water environment is closely related to the factors such as water seepage and rock mass rheology. The paper assumes that the creep behavior of the surrounding rock obeys the Norton-Hoff law, establishes the calculation model of the creep in the disturbed area of the underwater rock roadway, and uses the Laplace transformation and the effective stress to understand the time limitation of the stress and deformation of the rock roadway under the water; in Nor On the basis of the ton-Hoff solution, the calculation formula for the time dependent deformation of the underwater rock roadway is obtained, and the parameter sensitivity analysis of the creep deformation is carried out. The study shows that the creep deformation of the rock roadway decreases gradually with the increase of the viscosity coefficient of rock, and the hydraulic conductivity coefficient only affects the aging deformation of the deep surrounding rock. By increasing this coefficient, the displacement distribution of any point in the rock depth of rock roadway increases. This study can provide a theoretical reference for the more complex numerical calculation of creep deformation of underwater rock roadway.
【作者單位】： 西北綜合勘察設計研究院;成都理工大學地質災害防治與地質環(huán)境保護國家重點實驗室;
【基金】：國家自然科學基金資助項目(41172279)
【分類號】：TU45

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