岩土力学2024，Vol.45Issue(3)：725-736,12.DOI:10.16285/j.rsm.2023.0875
基于3D打印的粗糙结构面模型表征及渗流特性试验研究
Characterization of rough fracture model and the seepage characteristics based on 3D printing technology
摘要
Abstract
A three-dimensional rough structural surface characterization was carried out based on the Weierstrass-Mandelbrot(W-M)fractal function.The effects of typical W-M geometric parameters on the three-dimensional surface morphology were discussed.The two-dimensional and three-dimensional W-M geometric parameters corresponding to typical Barton JRC curves were analyzed and provided.Experimental fracture seepage tests on specimens with different fractal parameters and fracture aperture were conducted using a self-designed fracture seepage system based on 3D printing technology.The test results showed that the fluid flow exhibited obvious nonlinearity with increasing hydraulic gradient and roughness.The coefficients of A and B in the Forchheimer equation increased with increasing fracture roughness and decreased with increasing fracture aperture.Meanwhile,the critical Reynolds coefficient tended to decrease as the roughness increased,indicating a tendency towards non-Darcy flow.The analysis of fluid flow patterns revealed that the flow velocity of the smooth structure surface of the model was relatively uniform.The flow field of the rough surface was complex showing several high and low flow velocity regions along the rough surfaces.The research results provide reliable analytical methods and models for the study of fracture seepage characteristics.关键词
岩石裂隙/渗流试验/分形维数/粗糙度/3D打印Key words
rock fracture/seepage test/fractal dimension/roughness/3D printing分类
建筑与水利引用本文复制引用
王培涛,黄浩,张博,王路军,杨毅..基于3D打印的粗糙结构面模型表征及渗流特性试验研究[J].岩土力学,2024,45(3):725-736,12.基金项目
国家重点研发计划项目(No.2021YFC2900500,No.2023YFC2907401) （No.2021YFC2900500,No.2023YFC2907401）
国家自然科学基金项目(No.52074020) （No.52074020）
煤炭开采水资源保护与利用国家重点实验室2019年开放基金课题(No.WPUKFJJ2019-06) （No.WPUKFJJ2019-06）
北京科技大学青年教师学科交叉研究项目(中央高校基本科研业务费专项资金)资助项目(No.FRF-IDRY-21-00l).This work was supported by the National Key R&D Program of China(2021YFC2900500,2023YFC2907401),the National Natural Science Foundation of China(52074020),the Open Fund of State Key Laboratory of Water Resource Protection and Utilization in Coal Mining(WPUKFJJ2019-06)and the Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(FRF-IDRY-21-001). （中央高校基本科研业务费专项资金）
