基于MatDEM的降雨-采矿耦合作用下高坡角破坏机制模拟
论文题目
Simulating the Failure Mechanism of High-Slope Angles Under Rainfall-Mining Coupling Using MatDEM
1.School of Urban Construction, Changzhou University, Changzhou 213164, China; qihangli0325@126.com
2.School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
3.Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Maanshan 243000, China; ym_wang1018@126.com
4.Guizhou Survey and Design Research Institute for Water Resources and Hydropower, Guiyang 550001, China; gzsd@gzsdsjy.cn
5.School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; jiangsong@live.xauat.edu.cn
6.College of Engineering, Design and Physical Sciences, Brunel University London, London UB8 3PH, UK; bin.gong@brunel.ac.uk
7.College of Civil Engineering, Qilu Institute of Technology, Jinan 250200, China
8.Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing 312000, China
研究内容
Abstract: The safety production of gold, silver, copper, and other important metals is seriously threatened in the process of mining from open-pit to underground due to various factors such as infiltration caused by rainfall and unloading during mining. Furthermore, the current situation of open-pit mining in an increasing number of mines presents a high and steep terrain, which poses significant security risks. Accordingly, it is of great practical significance to investigate the failure mechanism of high-slope angles to ensure the long-term safe mining of mines, considering factors such as rainfall infiltration and excavation unloading. In this study, the slope failure of high-slope angles (45°, 55°, and 65°) under rainfall-mining coupling was analyzed using the discrete element MatDEM numerical simulation software. Herein, the stress distribution, failure characteristics, and energy conversion of the model were simulated under different slope angles to analyze the failure mechanism at each stage. The simulation results show that the damage scale is smallest at 55° and largest at 65°. This indicates that setting the slope angle to 55° can reduce the risk of slope instability. Moreover, the reduction of elastic potential energy during the mine room mining stage is similar to that of mechanical energy. During the pillar mining stage, stress is concentrated in each goaf, resulting in a greater reduction in mechanical energy compared to elastic potential energy. Finally, after the completion of the continuous pillar mining stage, stress becomes concentrated in the failure area, and the effect of the slope angle on mechanical energy reduction becomes evident after the complete collapse of the model.
Keywords: MatDEM; rainfall infiltration; open-pit to underground mining; slope angles; failure mechanism; numerical simulation
Fig.4 Boundary conditions and direction of the seepage flow model.
Fig.6 Cloud map of rainfall and excavation-induced coupling stress variation under differentnumerical models of high-slope angles.
Fig.10 Cloud map of rainfall and excavation-induced coupling vertical displacement variationunder different numerical models of high-slope angles.
Fig.14 Energy change curves of different mining stages under a 55° slope angle model.
了解详情
Li, Q., Wang, Y., Hou, D., Jiang, S., Gong, B., & Li, X. (2025). Simulating the Failure Mechanism of High-Slope Angles Under Rainfall-Mining Coupling Using MatDEM. Water, 17(3), 414. https://doi.org/10.3390/w17030414
