Numerical simulation of land subsidence and verification of its character for an iron mine using sublevel caving

Cao; Shuai; Song; Weidong; Deng; Dan; Lei; Yuankun; Lan; Jianqiang

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Numerical simulation of land subsidence and verification of its character for an iron mine using sublevel caving

机译：铁矿开采地下塌陷的数值模拟及其特征验证

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摘要

Combined with a digital bored photography system and in-situ statistics concerning the joints and fissures of both ore-body and surrounding rock,a 2D discrete model was constructed using UDEC.The stress field and displacement field changes of different sublevel stoping systems were also studied.Changes in the overlying rock strata settlement pattern has been analyzed and validated by in-situ monitoring data.The results show that:in the caving process,there exists an obvious delay and jump for the overlying rock strata displacement over time,and a stable arch can be formed in the process of caving,which leads to hidden goafs.Disturbed by the mining activity,a stress increase occurred in both the hanging wall and the foot wall,demonstrating a hump-shaped distribution pattern.From the comparison between simulation results and in-situ monitoring results,land subsidence shows a slow-development,suddenfailure,slow-development cycle pattern,which leads eventually to a stable state.This pattern validates the existence of balanced arch and hidden goafs.

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《矿业科学技术学报：英文版》 |2016年第002期|P.327-332|共6页
作者
Cao; Shuai; Song; Weidong; Deng; Dan; Lei; Yuankun; Lan; Jianqiang;
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作者单位

[1]School of Civil and Environmental Engineering, University of Science and Technology Beijing. Beijing 100083, China;

[2]State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education, Beijing 100083, China;

[3]Zhenjiang Institute of Geology for Mineral Resources, Zhenjiang 212003, China;

[4]Chengchao Iron Mine, Wuhan Iron ＆ Steel Group Minerals Co. Ltd., Wuhan 430080, China;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 CHI
中图分类 TD853.362;
关键词
无底柱分段崩落法; 数值模拟; 地面沉降; 数据验证; 摄影系统; 开采过程; 节理裂隙; 离散模型;

机译：无底柱分段崩落法;数值模拟;地面沉降;数据验证;摄影系统;开采过程;节理裂隙;离散模型;

Numerical simulation of land subsidence and verification of its character for an iron mine using sublevel caving

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