CAJ | 학술논문

基于多孔介质渗流理论，推导了流固耦合作用下陷落柱充填物颗粒的质量守恒方程、动量守恒方程以及陷落柱孔隙率演化方程，建立了陷落柱的变质量渗流力学模型和相应的数值计算模型。假定陷落柱内岩体孔隙率服从Weibull分布，利用多物理场耦合软件COMSOL Multiphysics 对所建的数值计算模型进行了求解，得到了不同时刻陷落柱内孔隙率和渗流速度的分布图，以及渗流量随时间变化曲线。研究结果表明：1)初始阶段陷落柱内部渗流通道随机分布，在水流对不同孔隙度的岩体侵蚀作用下，最后演变成数条主要的渗流通道；2)陷落柱的整体渗流速度在初始时刻增加较慢，随着孔隙度的增大和贯通，渗流速度会加速增大。
기우다공개질삼류이론，추도료류고우합작용하함락주충전물과립적질량수항방정、동량수항방정이급함락주공극솔연화방정，건립료함락주적변질량삼류역학모형화상응적수치계산모형。가정함락주내암체공극솔복종Weibull분포，이용다물리장우합연건COMSOL Multiphysics 대소건적수치계산모형진행료구해，득도료불동시각함락주내공극솔화삼류속도적분포도，이급삼류량수시간변화곡선。연구결과표명：1)초시계단함락주내부삼류통도수궤분포，재수류대불동공극도적암체침식작용하，최후연변성수조주요적삼류통도；2)함락주적정체삼류속도재초시시각증가교만，수착공극도적증대화관통，삼류속도회가속증대。
Based on the seepage theory of porous media, the mass conservation equation, momentum conservation equation and the porosity evolution of particles in collapse column with fluid-structure in-teraction is deduced and a mechanical model for collapse column water inrush is proposed, which takes the mass variation during the seepage into consideration. Then, numerical simulation is carried on using COMSOL Multiphysics, which is a Finite Element Code. By assuming that the porosity in collapse columns obeys the Weibull distribution, the distribution of the porosity and seepage velocity in the col-lapse column at different times is obtained, and the seepage discharge is calculated. The results show that:1) the seepage channels initially distribute randomly, however, with the different erosion effect of water on rock with different porosity, they finally form several main channels;2) the seepage capacity of the collapse column initially grows slowly, while seepage velocity increases significantly with the growth and connectivity of porosity.