矿山开采沉陷的FLAC~(3D)数值模拟分析
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摘要
利用FLAC~(3D) 数值模拟了煤层开采沉陷,主要分析了开采矿山工作面及增加已开采矿山工作面的开挖深度对变电站及其周围监测点沉陷量的影响。结果表明:各个工作面整体上对变电站的沉降量影响比较小。变电站沉降量随着单独开采工作面的增加在微小地增大,最后达到稳定。共同增加开挖工作面时对变电站沉降的影响比单独开挖时稍大。变电站的沉降值随着工作面开采深度的增加逐渐增大,增加单独开采工作面的开挖深度对变电站沉降的影响小于其共同开采的影响。
The numerical simulation of mining subsidence is carried out by using the FLAC~(3D) . The effect of mining working faces and increasing its excavation depth on the subsidence of substation and its surrounding monitoring is mainly analyzed. The results show that the influence of each working face on the subsidence of substation is relatively small. The subsidence of the substation increases with the increase of the mining face, which is carried out separately, and finally reaches the stability. The effect of the joint excavation of the working face on the substation is larger than the separately excavation.The substation subsidence value increases with the excavation depth gradually increased. Increasing the separately excavation depth of working face is less than that of joint excavation face.
The numerical simulation of mining subsidence is carried out by using the FLAC~(3D) . The effect of mining working faces and increasing its excavation depth on the subsidence of substation and its surrounding monitoring is mainly analyzed. The results show that the influence of each working face on the subsidence of substation is relatively small. The subsidence of the substation increases with the increase of the mining face, which is carried out separately, and finally reaches the stability. The effect of the joint excavation of the working face on the substation is larger than the separately excavation.The substation subsidence value increases with the excavation depth gradually increased. Increasing the separately excavation depth of working face is less than that of joint excavation face.
引文
[1]刘玉成,曹树刚,刘延保.可描述地表沉陷动态过程的时间函数模型探讨[J].岩土力学,2010,31(3):925-931.
[2]张兆江,吴侃,张安兵.基于关键层理论的概率积分法开采沉陷预计[J].煤炭科技,2010(1):23-24,26.
[3]杨建立,左建平,孙凯,等.大采高多断层工作面综放诱发地表沉陷观测及数值分析[J].岩石力学与工程学报,2011,30(6):1 216-1 224.
[4]李培现.深部开采地表沉陷规律及预测方法研究—以徐州矿区为例[D].徐州:中国矿业大学,2012.
[5]彭帅英.高速公路下伏多层采空区地表沉陷数值模拟及预测研究[D].长春:吉林大学,2013.
[6]金大玮,李建桥,党兆龙,等.滑转条件下月球车轮沉陷模型研究[J].航空学报,2013,34(5):1 215-1 221.
[7]刘振国.DIn SAR技术在矿区地表重复采动开采沉陷监测中的应用研究[D].徐州:中国矿业大学,2014.
[2]张兆江,吴侃,张安兵.基于关键层理论的概率积分法开采沉陷预计[J].煤炭科技,2010(1):23-24,26.
[3]杨建立,左建平,孙凯,等.大采高多断层工作面综放诱发地表沉陷观测及数值分析[J].岩石力学与工程学报,2011,30(6):1 216-1 224.
[4]李培现.深部开采地表沉陷规律及预测方法研究—以徐州矿区为例[D].徐州:中国矿业大学,2012.
[5]彭帅英.高速公路下伏多层采空区地表沉陷数值模拟及预测研究[D].长春:吉林大学,2013.
[6]金大玮,李建桥,党兆龙,等.滑转条件下月球车轮沉陷模型研究[J].航空学报,2013,34(5):1 215-1 221.
[7]刘振国.DIn SAR技术在矿区地表重复采动开采沉陷监测中的应用研究[D].徐州:中国矿业大学,2014.