摘要
通过模拟断层破碎带岩石裂隙内流体流动,得到自然裂隙内流体流动分布规律。根据理论分析建立楔形流域的流速分布模型,发现裂隙主流区的位置可以用裂隙截面的最大内切圆表示。采用计算机断层扫描算法(computed tomography,CT)重建断层介质骨架自然裂隙,使用MATLAB求解截面裂隙的最大内切圆来计算裂隙的渗透性。将最大内切圆法计算裂隙渗透性和水力直径法计算裂隙渗透性的结果进行相关性分析,两者相关性为0.976,说明裂隙截面的最大内切圆替代水力直径计算裂隙渗透性是可行的。
The distribution law of fluid flow in natural fissures was obtained by simulating the fluid flow in the rock fissures of the fault fracture zone.Based on the theoretical analysis,the velocity distribution model of wedge-shaped flow field was established.It was found that the location of the fracture mainstream zone could be expressed by the maximum inscribed circle of the fracture section.Computed tomography(CT)was used to reconstruct the natural fracture of the dielectric skeleton of the fault,and the maximum inscribed circle of the fracture was calculated by MATLAB to estimate the permeability of the fracture.The correlation between the results to calculate the fracture permeability obtained by the maximum inscribed circle method and the hydraulic diameter method was 0.976,which indicated that it was feasible to calculate the fracture permeability by the maximum inscribed circle of the fracture section instead of the hydraulic diameter.
作者
孙文斌
曹震博
董法旭
SUN Wenbin;CAO Zhenbo;DONG Faxu(School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China)
出处
《隧道与地下工程灾害防治》
2023年第1期1-7,共7页
Hazard Control in Tunnelling and Underground Engineering
基金
国家自然科学基金面上资助项目(51974172,52274131)
山东省高等学校青创科技计划资助项目(2020KJH001)
煤炭资源高效开采与洁净利用国家重点实验室开放基金资助项目(2021-CMCU-KF017)。
