注浆-钢衬联合堵水立井围岩非达西渗流场与有效应力场分析

方雷伟; 周晓敏; 马文著

注浆-钢衬联合堵水立井围岩非达西渗流场与有效应力场分析

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- 发布日期: 2023-05-19

Analysis of non-Darcy seepage field and effective stress field of surrounding rock of vertical shaft with grouting-steel lining combined water blocking

摘要

摘要: 高水压条件下采矿深立井围岩的饱和渗流一般处于非达西渗流状态，以此状态下深立井注浆防水与钢衬联合支护方案为研究对象，基于Izbash非达西渗流模型、厚壁圆筒理论以及连续介质弹性力学理论，借助计算机符号运算软件，对注浆-钢衬支护作用下的井周位移场和应力场完成解析求解，通过有限元软件ABAQUS将解析解和数值解进行了对比，两者结果基本一致；基于所得解析解进一步研究了非达西渗流系数变化和注浆-钢衬联合支护参数变化对支护效果的影响；提出了以控制涌水量来对注浆-钢衬联合支护优化设计方法并进行了算例计算。研究结果表明：非达西渗流系数越大，钢材井壁处环向应力随着钢衬厚度、注浆半径增大而减小的幅度也越大，增大非达西渗流系数对与提升注浆-钢衬联合支护的支护效果具有积极作用。
Abstract: The saturation seepage in the surrounding rock of the deep vertical shaft under high water pressure condition is generally in the non-Darcy seepage state, taking this state of deep vertical shaft grouting and waterproofing combined with steel lining support scheme as the research object, based on the Izbash non-Darcy seepage model, thick-walled cylinder theory and continuous medium elasticity theory, with the help of computer symbolic computing software, the displacement field and stress field of the well perimeter under the action of grouting and steel lining support are analytically solved. The analytical solution and numerical solution are compared by using the finite element software ABAQUS, and the results are basically consistent. Based on the obtained analytical solution, we further studied the effect of the change of non-Darcy seepage coefficient and the change of slurry-steel liner joint support parameters on the support effect. The design optimization method of grouting-steel liner joint support is proposed and calculated by controlling the amount of water inrush. The results showed that the larger the non-Darcy seepage coefficient, the greater the reduction of circumferential stress at the steel well wall with the increase of steel liner thickness and slurry radius. It has a positive effect to enhance the grouting - steel lining joint support effect by the greater non-Darcy seepage coefficient.
- prevention of mine water hazards /
- deep shaft /
- rigid lining grouting combined support /
- analytical model /
- non-Darcy seepage /
- thin-walled cylinder theory

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