Stability analysis on backfilling schemes of goaf group under condition of residual mining

被引：0
|
作者：
Zhou Z. [1 ]
Jiang L. [2 ]
Wang G. [2 ]
Han Z. [1 ]
机构：
[1] School of Resources and Safety Engineering, Central South University, Changsha
[2] Institute of Safety Science and Engineering, South China University of Technology, Guangzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2018年 / 49卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Backfilling scheme; Dynamic response; Goaf group; Stress response; Unstable control;
D O I：
10.11817/j.issn.1672-7207.2018.10.022
中图分类号：
TD [矿业工程];
学科分类号：
0819 ;
摘要：
To study the unstable response control of goaf group under the condition of residual mining, the effect of the unstable control of goaf group was investigated from dynamic response and stress response using the dynamic response model and the analogous frame structure model. Taking the goaf group composed of 12 unit goafs of 4 middle sections in a large metal mine as research object, the unstable response control of goaf group in the residual mining engineering was studied under complete backfilling scheme(scheme I) and incomplete backfilling scheme(scheme II). The results show that the tensile stress distribution range is shifted up after the treatment of complete backfilling, with the main concentration being at the roof of 1 570 m middle section, and the phenomenon of tensile stress concentration is basically eliminated at the floor of 1 420 m middle section. Under the incomplete backfilling scheme, the tensile stress concentration can be relieved and kept within a stable range. The displacement and velocity response of each middle section roof of the goaf group reduce greatly and have good effect under complete backfilling scheme. After the treatment of incomplete backfilling, the displacement and velocity response of each middle section roof of the goaf group reduce significantly, and the decrease is basically the same as that of scheme I. The new goaf group system formed by the incomplete backfilling scheme has good stability. Taking into account the time cost and the fund, it is more feasible to adopt a preliminary backfilling scheme for the key goaf. © 2018, Central South University Press. All right reserved.
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收藏
页码：2545 / 2552
页数：7
相关论文
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