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| Study on surrounding rock stability of working face with different filling methods based on the dynamic evolution of goaf stiffness |
| Ji Yuxin 1, Song Gaofeng 2, Li Yan 1 |
| 1. School of Civil Engineering, Ordos Institute of Applied Technology, Ordos 017010, China; 2. School of Civil Engineering, North China University of Technology, Beijing 100144, China |
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Abstract In order to study the overlying strata movement law and strata control effect of partial filling coal mining technology, the dynamic evolution of filling body strength in goaf was considered, and the numerical model of full filling and partial filling was established. Under the influence of different filling methods, the development law of surrounding rock pressure, the development degree of coal plastic zone in front of working face, the displacement and deformation of coal body, the evolution law of roof and floor displacement, the displacement of overlying strata and the law of surface subsidence were studied and compared. The results showed that compared with the full filling mining technology, the peak value of the abutment pressure increase coefficient in front of the working face of the partial filling model increased from 3.3 to 3.8 ; the displacement of the coal wall in the working face increased by about 10 mm ; the width of plastic zone increased by about 0.72 m. The maximum subsidence of the immediate roof was increased by about 9.3 mm, and the maximum subsidence of the overlying rock was increased by about 12.7 mm. It was concluded that the surrounding rock control effect of partial filling coal mining technology was slightly worse than that of full filling coal mining technology, but it was generally within the acceptable range.
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| [ 1 ] 张方哲. 中国煤矿资源评估与开发可行性研究[ D ]. 北京:中国地质大学( 北京 ),2010.
[ 2 ] 张 卫. 对煤矿采矿技术现状及未来发展趋势的探讨[ J ]. 科学技术创新,2019( 24 ):161 - 162.
[ 3 ] 张国荣. 中国煤炭资源绿色开采技术的发展探讨[ J ]. 能源与节能,2017( 11 ):161 - 162,164.
[ 4 ] 胡炳南. 我国煤矿充填开采技术及其发展趋势[ J ]. 煤炭科学技术,2012,40( 11 ):1 - 5,18.
[ 5 ] 张梦华. 羊东矿“三下”压煤地表沉降研究[ J ]. 煤炭与化工,2023,46( 12 ):61 - 64.
[ 6 ] 吴 涛,方向清,宁树正,等. 华北型煤田“三下一上”煤炭资源现状及开发利用研究[ J ]. 煤炭科学技术,2021,49( 9 ):129 - 135.
[ 7 ] 宋高峰,刘会臣,任志成.“三下”压煤充填采煤技术发展现状及展望[ J ]. 煤矿安全,2014,45( 10 ):191 - 193,197.
[ 8 ] 赵国喜. 三下压煤充填采煤技术发展现状及展望[ J ]. 能源与节能,2016( 7 ):129 - 130.
[ 9 ] 李 俊,寇云鹏,杨 震,等.“三下”压煤充填开采研究现状综述[ J ]. 黑龙江科技信息,2012( 12 ):43 - 44.
[ 10 ] 程健新,苏 健. 对充填采煤理论与技术思考[ J ]. 内蒙古煤炭经济,2016( 9 ):25,33.
[ 11 ] 缪协兴,巨 峰,黄艳利,等. 充填采煤理论与技术的新进展及展望[ J ]. 中国矿业大学学报,2015,44( 3 ):391 - 399,429.
[ 12 ] 姜树海. 控制煤矿开采沉陷的部分充填开采技术研究[ J ]. 山东工业技术,2018( 3 ):77.
[ 13 ] 朱光辉,傅 鑫,王敬喻. 控制煤矿开采沉陷的部分充填开采技术研究[ J ]. 内蒙古煤炭经济,2023( 20 ):40 - 42.
[ 14 ] 陈晓东. 控制煤矿开采沉陷的部分充填开采技术及运用分析[ J ]. 中国石油和化工标准与质量,2022,42( 10 ):160 - 162.
[ 15 ] 李 劢. 煤矿开采沉陷的部分充填开采技术[ J ]. 山西化工,2021,41( 5 ):128 - 130.
[ 16 ] 孙光中,荆永滨,王公忠,等. 条带充填开采覆岩承载结构及地表变形研究[ J ]. 煤矿安全,2016,47( 5 ):73 - 76.
[ 17 ] 刘树新,苏彦斌,韩兴华. 不同采煤方法下开采沉陷的数值模拟研究[ J ]. 中国矿业,2015,24( 12 ):89 - 93.
[ 18 ] 谢文兵,史振凡,陈晓祥,等. 部分充填开采围岩活动规律分析[ J ]. 中国矿业大学学报,2004( 2 ):38 - 41.
[ 19 ] 李永明,刘长友,王 晓,等. 急倾斜煤层充填开采区段平巷围岩稳定性模拟研究[ J ]. 中国煤炭,2011,37( 4 ):49 - 54.
[ 20 ] 赵兵朝,翟 迪,杨 啸,等. 充填体 - 煤柱承载效应及合理开采参数研究[ J ]. 矿业研究与开发,2020,40( 10 ):15 - 21.
[ 21 ] 文排科. 基于Phase2有限元分析的巷道围岩稳定性研究[ J ]. 煤炭技术,2015,34( 1 ):35 - 37. |
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