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| Prediction and control of surface subsidence in solid filling mining |
| Li Xinwang 1, 2, Qu Zhengyi 1, Cheng Lichao 1, 2, Guo Xiangyu 1, Li Wengui 1 |
| 1. School of Mining Geomatics Engineering, Hebei University of Engineering, Handan 056038, China; 2. Coal Resources Development and Construcyion Application Technology Research Center of Universities in Hebei Province,
Hebei University of Engineering,Handan 056038, China |
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Abstract In order to study the prediction and control of surface subsidence in solid backfill mining, based on the probability integral method and the elastic foundation theory, the prediction model of surface subsidence in solid backfill mining was established with Xingtai Mine as the background, and the theoretical solution of surface subsidence value was obtained. The numerical simulation and similar simulation were combined to simulate the initial filling rates of 80 %, 85 %, 90 % and 95 %, and the surface subsidence value and subsidence coefficient under different initial filling rates, as well as the migration law of grazing rock and surface subsidence basin in different advancing stages were studied and analyzed. The results show that the subsidence prediction model based on probability integration method and elastic foundation theory is feasible to predict the surface subsidence, which provides a theoretical basis for the surface subsidence control of solid backfill mining. Compared with caving method, the surface subsidence coefficient of solid filling mining is reduced by 93. 18 % ~ 93. 33 % on average, the initial filling rate is improved, and the under-topped amount of filling body is reduced, which can effectively control the surface subsidence. The migration law of working face rock and surface subsidence basin in different advancing stages is revealed, which provides a reference for the protection of surface structures.
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| [ 1 ] 缪协兴，钱鸣高. 中国煤炭资源绿色开采研究现状与展望[ J ]. 采矿与安全工程学报，2009，26（ 1 ）：1 - 14.
[ 2 ] 钱鸣高，许家林，缪协兴. 煤矿绿色开采技术[ J ]. 中国矿业大学学报，2003（ 4 ）：5 - 10.
[ 3 ] 牛小森. 千米深井井下矸石分选及充填技术研究[ J ]. 煤炭与化工，2019，42（ 3 ）：26 - 29.
[ 4 ] 任 伟. 邢台矿厚煤层分层充填开采技术实践[ J ]. 煤炭与化工，2021，44（ 10 ）：19 - 21.
[ 5 ] 缪协兴，张吉雄. 矸石充填采煤中的矿压显现规律分析[ J ]. 采矿与安全工程学报，2007（ 4 ）：379 - 382.
[ 6 ] Jixiong Zhang, Qiang Zhang, Qiang Sun, Rui Gao, Deon Germain, Sami Abro. Surface subsidence control theory and application to backfill coal mining technology[ J ]. Environmental Earth Sciences, 2015, 74( 2 ).
[ 7 ] 张 升，张吉雄，闫 浩，等. 极近距离煤层固体充填充实率协同控制覆岩运移规律研究[ J ]. 采矿与安全工程学报，2019，36（ 4 ）：712 - 718.
[ 8 ] 许家林，钱鸣高，朱卫兵. 覆岩主关键层对地表下沉动态的影响研究[ J ]. 岩石力学与工程学报，2005（ 5 ）：787 - 791.
[ 9 ] 王 磊. 固体密实充填开采岩层移动机理及变形预测研究[ D ]. 徐州：中国矿业大学，2012.
[ 10 ] 何国清，杨 伦. 矿山开采沉陷学[ M ]. 徐州：中国矿业大学出版社，1991.
[ 11 ] 冯锐敏. 充填开采覆岩移动变形及矿压显现规律研究[ D ]. 北京：中国矿业大学（北京），2013.
[ 12 ] 李新旺，赵新元，程立朝，等. 密实充填矿压显现时空演化规律研究[ J ]. 岩石力学与工程学报，2020，39（ 2 ）：341 - 348. |
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