爆破震动对HML露天矿边坡影响的研究
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摘要
频繁的爆破震动会对露天矿已有边坡稳定性造成影响。以HML露天矿为背景,监测爆破震动对边坡的扰动,用回归分析原理得出爆破地震波在岩体中传播衰减规律公式。为今后的爆破设计和震动的预测提供依据。在原有的数据基础上,利用LS—DYNA显式动力分析软件模拟矿山爆破,分析爆破地震波对边坡的影响。在边坡模型上选取点和单元体,通过分析比较其震动速度和有效应力的衰减规律,可以总结出地震波在HML矿山岩体中的传播规律和危害机理。为确保矿山生产顺利进行,维护矿山边坡的稳定性提供依据。
Frequent blasting vibration could exert its influence on the stability of exiting slope of open-pit mine.Based on the study of HML open-pit mine monitors the effect of blasting vibration on the slope and obtains the formula of decay law of blasting seismic waves in rock mass with regression analysis principle.According to the formula,it can help to design the blasting parameter and predict the vibration for future.Based on the former data,the mine blasting could be simulated by the LS—DYNA explicit dynamic analysis software to analysis the effect of blasting vibration on slope.The mechanism of hazards and laws of seismic waves in the propagation of the rock mass can be concluded by analyzing the vibration speed and effective stress of dot and element from slope model in HML mining which ensures the smooth running of mine production and provides the basis to maintain the stability of the slope.
Frequent blasting vibration could exert its influence on the stability of exiting slope of open-pit mine.Based on the study of HML open-pit mine monitors the effect of blasting vibration on the slope and obtains the formula of decay law of blasting seismic waves in rock mass with regression analysis principle.According to the formula,it can help to design the blasting parameter and predict the vibration for future.Based on the former data,the mine blasting could be simulated by the LS—DYNA explicit dynamic analysis software to analysis the effect of blasting vibration on slope.The mechanism of hazards and laws of seismic waves in the propagation of the rock mass can be concluded by analyzing the vibration speed and effective stress of dot and element from slope model in HML mining which ensures the smooth running of mine production and provides the basis to maintain the stability of the slope.
引文
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[8]曾志林.爆破振动对高陡边坡稳定性影响及控制技术研究[D].长沙:中南大学,2010.[8]ZENG Zhi-lin.Research on the influence of blasting vi-bration of high and steep slope stability and control tech-nology[D].Changsha:Central South University,2010.(inChinese)
[2]罗忆,卢文波,陈明,等.爆破振动安全判据研究综述[J].爆破,2010,27(1):14-22.[2]LUO Yi,LU Wen-bo,CHEN Ming,et al.View of researchon safety criterion of blasting vibration[J].Blasting,2010,27(1):14-22.(in Chinese)
[3]MROZ Z,NAWROCKI P.Deformation and stability of anelast plastic softening pillar[J].Rock Mechanics andRock Engineering,1989(7):69-108.
[4]丁金刚,张学民.小间距隧道爆破地震效应的损伤控制研究[J].爆破,2009,26(3):94-97.[4]DING Jin-gang,ZHANG Xue-min.Damage control researchof seismic effect from small spacing tunnels blasting[J].Blasting,2009,26(3):94-97.(in Chinese)
[5]陈玲玲,陈敏中,钱胜国.岩质陡高边坡地震动力稳定分析[J].长江科学院院报,2004,21(1):33-35.[5]CHEN Ling-ling,CHEN Min-zhong,QIANG Sheng-guo.Analysis the stability of earthquake dynamic in the highrock slope[J].Journal of Yangtze River Scientific Re-search Institute,2004(1):33-35.(in Chinese)
[6]尚晓江,苏建宇,王化锋,等.ANSY/LS—DYNA动力分析方法与工程实例[M].北京:中国水利水电出版社,2005:30-55.[6]SHANG Xiao-jiang,SU Jian-yu,WANG Hua-feng,et al.Dynamic analysis method of ANSY/LS—DYNA and engi-neering project[M].Beijing:China Waterpower Press,2005:30-55.(in Chinese)
[7]XIAO Fu-kun,SUN Guang-yi,TIAN Li-hui.Numerical simu-lation of rock stability under dynamic blasting load[J].Trans Tech Publications Ltd,2006(11):353-358.
[8]曾志林.爆破振动对高陡边坡稳定性影响及控制技术研究[D].长沙:中南大学,2010.[8]ZENG Zhi-lin.Research on the influence of blasting vi-bration of high and steep slope stability and control tech-nology[D].Changsha:Central South University,2010.(inChinese)
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