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有色金属(矿山部分):2021,73(2):5-10
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FLAC3D数值模拟露天转地下边坡及采场稳定性研究
李启航1, 李小双1,2,3, 耿加波1,罗浪1
((1.江西理工大学 资源与环境工程学院,江西 赣州 341000;2. 中钢集团马鞍山矿山研究总院股份有限公司,安徽 马鞍山 243000; 3. 金属矿山安全与健康国家重点实验室,安徽 马鞍山 243000))
FLAC3D numerical simulation of open-pit transformation to underground slope and stope stability
LI Qihang,LI Xiaoshuang1,2,3,GENG Jiabo1, LUO Lang1
((1. School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganz1hou Jiangxi 341000, China; 2. Sinosteel Maanshan Mine Research Institute Co., Ltd.,Maanshan Anhui 243000, China; 3. State Key Laboratory of Safety and Health in Metal Mines,Maanshan Anhui 243000, China) ))
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投稿时间:2020-09-06    修订日期:2020-09-14
中文摘要: 本文以云南晋宁周边典型的缓倾斜薄至中厚磷矿床为研究对象,基于AutoCAD-ANSYS-FLAC3D等软件进行耦合建模,分别建立200m和300m不同开采深度的单一地下开采模型和在露天终了边坡为45°倾角时露天转地下开采模型,并展开了数值模拟试验。研究结果表明:当边坡高度为200m时,整个露天转地下开采过程中边坡岩体及采场覆岩整体稳定;边坡高度为300m时,边坡侧塑性区出现贯通,边坡岩体将发生弯曲下沉破坏。因此综合经济和安全性考虑,建议控制露天边坡坡高在200m以内。相关研究结果可对磷矿山地下开采工程提供一定的技术参考价值。
Abstract:This paper takes the typical gently inclined thin to medium thick phosphorus deposits around Jinning, Yunnan as the research object, and conducts coupling modeling based on software such as AutoCAD-ANSYS-FLAC3D, and establishes a single underground mining model with different mining depths of 200m and 300m and open-pit mining. Finally, when the slope is 45°, the open-pit mining model is converted to underground mining, and a numerical simulation test is carried out. The research results show that when the height of the slope is 200m, the slope rock mass and the overlying rock of the stope are overall stable during the entire process of converting from open pit to underground mining; when the slope height is 300m, the plastic zone on the side of the slope is connected, and the slope rock mass Bending and sinking damage will occur. Therefore, in consideration of comprehensive economy and safety, it is recommended to control the open-air slope height within 200m. Relevant research results can provide a certain technical reference value for underground mining projects in phosphate mines.
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基金项目:国家自然科学基金资助项目(41702327)
引用文本:
李启航,李小双,耿加波,罗浪.FLAC3D数值模拟露天转地下边坡及采场稳定性研究[J].有色金属(矿山部分),2021,73(2):5-10.
LI Qihang,LI Xiaoshuang,GENG Jiabo,LUO Lang.FLAC3D numerical simulation of open-pit transformation to underground slope and stope stability[J].NONFERROUS METALS(Mining Section),2021,73(2):5-10.

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