Analysis on stope surrounding rock stability and mining entrance repair technology in sublevel caving method

被引：0
|
作者：
Meng Q. [1 ]
Wang C. [1 ]
Han L. [1 ]
Chen K. [2 ]
Huang X. [2 ]
Qi B. [1 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, 221116, Jiangsu
[2] Gushan Mining Company, Ma Stell (Group) Shareholding Co Ltd, Ma'anshan, 243184, Anhui
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2019年 / 36卷 / 02期
关键词：
Deformation and failure characteristics; Instability mechanism; Mining entrance; Sublevel caving method; Supporting technology with pressure releasing and yielding;
D O I：
10.13545/j.cnki.jmse.2019.02.020
中图分类号：
学科分类号：
摘要：
The loose zone of mining entrance surrounding rock was determined as 1.5~2.0 m by adopting geological radar. At the same time, the deformation characteristics and instability mechanism of surrounding rock were also analyzed. Based on the characteristics of sublevel caving method, 3D numerical models for 3 levels of -187.5 m, -200.0 m and -212.5 m were established, respectively. The mining entrance in different layers and process of orebody stoping were investigated by using FLAC3D software. The evolution law of deformation field and stress field in the process of mining entrance excavation, orebody stoping and different mining sequences were revealed. According to the evolution characteristics of surrounding rock deformation and instability in mining entrance, the repair technical scheme including anchor net spray and pre-stressed yield bolt was put forward. Industrial field tests show that the supporting technology with pressure releasing and yielding could effectively solve the stability issue in mining entrance during orebody stoping in Hemushan iron mine. © 2019, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：364 / 372
页数：8
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