基于FLAC~(3D)平台的边坡稳定性分析——以普阳煤矿1号排土场为例
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摘要
为查明普阳煤矿1号排土场目前内部应力应变特征及继续进行排土作业的可行性,本文结合根据野外勘察及钻探工程获得的相关数据,建立了排土场的边坡三维模型,在FLAC~(3D)中运用自编折减强度法对该排土场进行应力应变特点及边坡变形失稳特点进行模拟分析。分析结果表明:普阳煤矿1号排土场当前的安全系数为0.972,已不具备继续排土作业的安全要求;边坡内部塑性剪切带仍在发育,有导通上部坡面的趋势,预测可能发生牵引式滑坡,滑面呈次圆弧状。
Based on the relevant data obtained from field survey and drilling engineering, this paper establishes a three-dimensional model of the slope of No.1 dump in Puyang Coal Mine, and simulates the stress and strain characteristics of the dump in FLAC~(3 D) by using the self-made reduction strength method. The three-dimensional numerical simulation analysis of the deformation and instability characteristics of the dumping slope shows that the current safety factor of the No. 1 dumping site in Puyang Coal Mine is 0.972, which has no safe conditions for continuing the earth moving operation; The plastic shear zone is still developing, and there is a tendency to conduct the upper slope. It is predicted that the traction landslide may occur, and the slip surface is sub-arc.
Based on the relevant data obtained from field survey and drilling engineering, this paper establishes a three-dimensional model of the slope of No.1 dump in Puyang Coal Mine, and simulates the stress and strain characteristics of the dump in FLAC~(3 D) by using the self-made reduction strength method. The three-dimensional numerical simulation analysis of the deformation and instability characteristics of the dumping slope shows that the current safety factor of the No. 1 dumping site in Puyang Coal Mine is 0.972, which has no safe conditions for continuing the earth moving operation; The plastic shear zone is still developing, and there is a tendency to conduct the upper slope. It is predicted that the traction landslide may occur, and the slip surface is sub-arc.
引文
[1] 甘海阔,周汉民,崔旋.排土场边坡区域稳定性及整体安全度分析研究[J].金属矿山,2018,(6):147-152.
[2] 刘玉凤,李伟,马明,赵汝辉.黑岱沟露天矿阴湾排土场滑坡治理技术优化[J].煤矿安全,2017,48(09):96-99.
[3] 云南省煤田地质局昆明工程勘察公司.云南省普阳煤矿一号排土场岩土工程详细勘察报告[R].昆明:云南省煤田地质局昆明工程勘察公司,2017:22-30.
[4] 任伟,李小春,王少泉,等.排土场破坏过程及稳定性模型试验研究[J].金属矿山,2012,(8):28-33.
[5] 刘子春,韩猛.扎尼河露天矿边坡治理措施与效果[J].煤炭科学技术,2017,45(S1):174-176+188.
[6] 史卜涛,张云,张巍.边坡稳定性分析的物质点强度折减法[J].岩土工程学报,2016,38(9):1678-1684.
[7] 吴顺川,韩龙强,李志鹏,等.基于滑面应力状态的边坡安全系数确定方法探讨[J].中国矿业大学学报,2018,47(4):719-726.
[8] 李世贵,黄达,石林,等.基于极限应变判据-动态局部强度折减的边坡破坏演化数值模拟[J].工程地质学报,2018,26(5):1227-1236.
[9] 刘汉东,贾聿颉.基于FLAC3D的边坡稳定性分析自编强度折减程序的修正[J].华北水利水电大学学报(自然科学版),2015,36(6):59-62.
[2] 刘玉凤,李伟,马明,赵汝辉.黑岱沟露天矿阴湾排土场滑坡治理技术优化[J].煤矿安全,2017,48(09):96-99.
[3] 云南省煤田地质局昆明工程勘察公司.云南省普阳煤矿一号排土场岩土工程详细勘察报告[R].昆明:云南省煤田地质局昆明工程勘察公司,2017:22-30.
[4] 任伟,李小春,王少泉,等.排土场破坏过程及稳定性模型试验研究[J].金属矿山,2012,(8):28-33.
[5] 刘子春,韩猛.扎尼河露天矿边坡治理措施与效果[J].煤炭科学技术,2017,45(S1):174-176+188.
[6] 史卜涛,张云,张巍.边坡稳定性分析的物质点强度折减法[J].岩土工程学报,2016,38(9):1678-1684.
[7] 吴顺川,韩龙强,李志鹏,等.基于滑面应力状态的边坡安全系数确定方法探讨[J].中国矿业大学学报,2018,47(4):719-726.
[8] 李世贵,黄达,石林,等.基于极限应变判据-动态局部强度折减的边坡破坏演化数值模拟[J].工程地质学报,2018,26(5):1227-1236.
[9] 刘汉东,贾聿颉.基于FLAC3D的边坡稳定性分析自编强度折减程序的修正[J].华北水利水电大学学报(自然科学版),2015,36(6):59-62.