|Table of Contents|

Numerical Simulation on Microscopic Formation Process of Water Erosion-induced Ground Fissures in Weihe Basin, China Based on DEM-CFD Coupling(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2025年第03期
Page:
386-396
Research Field:
黄河流域生态保护和高质量发展专刊(上)
Publishing date:

Info

Title:
Numerical Simulation on Microscopic Formation Process of Water Erosion-induced Ground Fissures in Weihe Basin, China Based on DEM-CFD Coupling
Author(s):
ZHANG Yan1; 2;  WANG Fu-jiang3;  WANG Fei-yong1; 2; 3*
(1.Key Laboratory of Earth Fissures Geological Disaster of Ministry of Natural Resources,Geological Survey of Jiangsu Province,Nanjing 210049,Jiangsu,China; 2.Field Scientific Observation and Research Station of Ground Fissure and Land Subsidence in Xi'an of Shaanxi,Ministry of Natural Resources,Xi'an 710054,Shaanxi,China; 3.School of Engineering and Technology/Institute of Geosafety,China University of Geosciences,Beijing 100083,China)
Keywords:
ground fissure;  water erosion-induced;  discrete element method;  computational fluid dynamics;  surface water erosion;  formation process;  Weihe Basin
PACS:
P694
DOI:
10.19814/j.jese.2024.10017
Abstract:
The Weihe Basin is one of the regions in China where ground fissure disasters are most severe. Among them, water erosion-induced ground fissures severely constrain regional economic development. The discrete element method(DEM)and computational fluid dynamics(CFD)were employed to establish a numerical model of water erosion-induced ground fissures based on a three-dimensional geological model of Weihe Basin. The formation and evolution processes of these ground fissures under the influence of surface water were analyzed from a microscopic perspective. The results show that the formation process of water erosion-induced ground fissures exhibits distinct stages, which can be sequentially divided into four stages, including subsurface erosion into hidden holes, hidden holes expansion, collapse forming sinkholes, and horizontal extensions into ground fissures; hidden holes represent the initial form of ground fissure development, typically growing vertically until surface rupture occurs, after which they expand into sinkholes and further extend horizontally into ground fissures; the stages of subsurface erosion into hidden holes and hidden holes expansion are primarily characterized by the migration of small to medium particles, and take the longest time; in contrast, the stages of collapse forming sinkholes and horizontal expansion into ground fissures involve the rapid loss of coarse particles and occur very quickly.

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Last Update: 2025-06-20