不同土岩比地表沉陷特征数值模拟分析
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摘要
为了探讨土岩比变化较大情况下地表移动变形规律,本文结合某真实矿区岩层状况,建立不同土岩比组合情况下的数值模型,并对其进行模拟分析,得到了不同土岩比条件下地表移动变形规律.随着松散层厚度的增加地表最大下沉与位移值先成对数增长,当达到巨厚松散层厚度后该值成线性趋势,并趋于稳定.随岩层厚度的增加,地表的沉降和位移在不断减小,沉降区域逐渐平缓,当岩层厚度达到某一数值时,地表位移与沉降数值会发生小幅度的上涨说明了岩层中阻止松散层沉降的控制层在整个沉降过程中的重要作用.该规律为土岩比变化较大的矿区的沉陷预计提供参考依据.
In order to study the law of surface movement and deformation under the condition of large variation of soil-rock ratio, the numerical model under different combination of soil-rock ratio is established and simulated. The law of surface movement and deformation under different soil-rock ratio is obtained. The maximum subsidence and displacement of the surface increase logarithmically with the increase of the thickness of the loose layer. When the thickness of the huge loose layer is reached, the maximum subsidence increases linearly and tends to be stable.With the increase of stratum thickness, the settlement and displacement of the surface are decreasing, and the settlement area is gradually flat. When the stratum thickness reaches a certain value, the surface displacement and settlement value will rise slightly, which shows that the control layer of preventing the settlement of loose stratum plays an important role in the whole settlement process. This rule provides a reference for the prediction of subsidence in mining areas with large variation of soil-rock ratio.
In order to study the law of surface movement and deformation under the condition of large variation of soil-rock ratio, the numerical model under different combination of soil-rock ratio is established and simulated. The law of surface movement and deformation under different soil-rock ratio is obtained. The maximum subsidence and displacement of the surface increase logarithmically with the increase of the thickness of the loose layer. When the thickness of the huge loose layer is reached, the maximum subsidence increases linearly and tends to be stable.With the increase of stratum thickness, the settlement and displacement of the surface are decreasing, and the settlement area is gradually flat. When the stratum thickness reaches a certain value, the surface displacement and settlement value will rise slightly, which shows that the control layer of preventing the settlement of loose stratum plays an important role in the whole settlement process. This rule provides a reference for the prediction of subsidence in mining areas with large variation of soil-rock ratio.
引文
[1]刘义新,戴华阳,姜耀东.厚松散层矿区采动岩土体移动规律模拟试验研究[J].采矿与安全工程学报,2012,29(5):700-706.
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[4]汤伏全,夏玉成,姚顽强,著.黄土覆盖矿区开采沉陷及其地面保护[M].北京:科学出版社,2011.
[5]邹友峰.矿山开采沉陷工程[M].徐州:中国矿业大学出版社,2003.
[6]郭增长,柴华彬.煤矿开采沉陷学[M].北京:煤炭工业出版社,2013.
[7]黄敏,唐绍辉,黄英华,等.基于ANSYS-FLAC~(3D)的采空区稳定性分析数值模拟研究[J].矿业研究与开发,2017,37(6):78-83.
[8]何东林.基于FLAC~(3D)的不同开采时(空)序下采空区上覆地层变形规律研究[D].济南:山东大学,2018.
[9]王初步,谭富生,王宇,等.基于数值模拟的复杂采空区稳定性分析[J].矿业研究与开发,2018,38(1):96-100.
[10]朱栋,徐新斌,张修峰,等.基于FLAC3D数值模拟预测采煤工作面上覆地表沉降研究[J].内蒙古煤炭经济,2018(19):26-28+33.
[2]李德海,苏美德,宋常胜.巨厚松散层下开采地表移动特征研究[J].煤矿开采,2002(3):50-52.
[3]胡海峰.不同土岩比复合介质地表沉陷规律及预测研究[D].太原:太原理工大学,2012.
[4]汤伏全,夏玉成,姚顽强,著.黄土覆盖矿区开采沉陷及其地面保护[M].北京:科学出版社,2011.
[5]邹友峰.矿山开采沉陷工程[M].徐州:中国矿业大学出版社,2003.
[6]郭增长,柴华彬.煤矿开采沉陷学[M].北京:煤炭工业出版社,2013.
[7]黄敏,唐绍辉,黄英华,等.基于ANSYS-FLAC~(3D)的采空区稳定性分析数值模拟研究[J].矿业研究与开发,2017,37(6):78-83.
[8]何东林.基于FLAC~(3D)的不同开采时(空)序下采空区上覆地层变形规律研究[D].济南:山东大学,2018.
[9]王初步,谭富生,王宇,等.基于数值模拟的复杂采空区稳定性分析[J].矿业研究与开发,2018,38(1):96-100.
[10]朱栋,徐新斌,张修峰,等.基于FLAC3D数值模拟预测采煤工作面上覆地表沉降研究[J].内蒙古煤炭经济,2018(19):26-28+33.