爆破动载荷作用下的矿山岩土液化建模和数值模拟研究
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摘要
在矿山爆破动载荷的强烈作用下,岩土层可能产生液化现象,并形成井下泥石流,造成重大损失。针对程潮铁矿长期存在的跑黄泥和泥石流安全隐患,基于饱和两相介质非线性固液耦合理论,提出了应用伯克利大学的OpenSees平台对矿山岩体与砂土液化现象进行数值模拟,并使用无量纲分析法对影响岩土液化的因素进行了分析研究。最后,应用修正萨道夫斯基回归公式和爆破震动速度与加速度的等效性,求得矿山岩土液化程度与爆破用药量的关系曲线。
With the strong action of mines blasting dynamic load,the rock layer may lead to liquefaction,and great loss like underground mud-rock flow may be created.In view of safety problems of slime running and landslides long-term existing in Chengchao iron ore,and based on the dynamic non-linear coupled solid and liquid constitutive equation,the numerical simulation of mine rocks and sand-soil liquefaction is proposed by applying the OpenSees produced by Berkeley University.What's more,the non-dimensional analysis is used to study the influencing factors of soil liquefaction.Lastly,the relationship curve about mining safety and rock blasting can be got through applying Sadov's formula and the equivalence of blasting vibration velocity and acceleration.
With the strong action of mines blasting dynamic load,the rock layer may lead to liquefaction,and great loss like underground mud-rock flow may be created.In view of safety problems of slime running and landslides long-term existing in Chengchao iron ore,and based on the dynamic non-linear coupled solid and liquid constitutive equation,the numerical simulation of mine rocks and sand-soil liquefaction is proposed by applying the OpenSees produced by Berkeley University.What's more,the non-dimensional analysis is used to study the influencing factors of soil liquefaction.Lastly,the relationship curve about mining safety and rock blasting can be got through applying Sadov's formula and the equivalence of blasting vibration velocity and acceleration.
引文
[1]欧阳治华,姚高辉,李强.基于非线性固液耦合模型的程潮铁矿地表变形研究[J].金属矿山,2008(2):381-385.
[2]欧阳治华,王胜开,全中学.矿山井下泥石流形成机理与固液耦合数值模拟研究[J].金属矿山,2008(10):21-24.
[3]Zienkiewicz O C,Chan A HC,Pastor M,et al.Computational geo-mechanics with special reference to earthquake engineering[M].New York:Wiley,1999.
[4]Ouyang Zhihua,Elsworth D.Evaluation of Groundwater Flow into Mined Panels[J].Int J Rock Mech Min Sci,1993,20(2):71-79.
[5]李立云,杜修力.动载作用下饱和土壤液化的研究述评[J].世界地震工程,2006,22(2):39-49.
[6]闫长斌,徐国元.爆破震动对采空区稳定性影响的FLAC3D分析[J].岩石力学与工程学报,2005,24(16):2894-2899.
[7]卢文波,来世骧.关于爆破震动速度和加速度等效性问题的讨论[J].爆破,2000(7):11-14.
[8]许梦国,王平.程潮铁矿西区放顶工程的地压与地下水监测及控制[J].采矿技术,2006,6(3):305-308.
[9]许海亮,张继春.钻孔爆破中质点振动速度的预测公式探讨[J].爆破,2003,20(3):75-78.
[2]欧阳治华,王胜开,全中学.矿山井下泥石流形成机理与固液耦合数值模拟研究[J].金属矿山,2008(10):21-24.
[3]Zienkiewicz O C,Chan A HC,Pastor M,et al.Computational geo-mechanics with special reference to earthquake engineering[M].New York:Wiley,1999.
[4]Ouyang Zhihua,Elsworth D.Evaluation of Groundwater Flow into Mined Panels[J].Int J Rock Mech Min Sci,1993,20(2):71-79.
[5]李立云,杜修力.动载作用下饱和土壤液化的研究述评[J].世界地震工程,2006,22(2):39-49.
[6]闫长斌,徐国元.爆破震动对采空区稳定性影响的FLAC3D分析[J].岩石力学与工程学报,2005,24(16):2894-2899.
[7]卢文波,来世骧.关于爆破震动速度和加速度等效性问题的讨论[J].爆破,2000(7):11-14.
[8]许梦国,王平.程潮铁矿西区放顶工程的地压与地下水监测及控制[J].采矿技术,2006,6(3):305-308.
[9]许海亮,张继春.钻孔爆破中质点振动速度的预测公式探讨[J].爆破,2003,20(3):75-78.
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