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金属矿山 ›› 2016, Vol. 45 ›› Issue (02): 137-140.

• 安全与环保 • 上一篇    下一篇

爆破动载作用下边坡临界振速及安全距离的计算

张亚宾1,2,张云鹏1,2,陈超1,2   

  1. 1.华北理工大学矿业工程学院,河北 唐山 063009;2.河北省矿业开发与安全工程实验室,河北 唐山 063009
  • 出版日期:2016-02-15 发布日期:2016-03-11
  • 基金资助:

    * 河北省高等学校科学技术研究重点项目(编号:ZD2014037),河北省自然科学基金项目(编号:E2014209093)。

Slope Critical Vibration Velocity and Safety Distance Calculation under the Blasting Dynamic Load

Zhang Yabin1,2,Zhang Yunpeng1,2,Chen Chao1,2   

  1. 1.North China University of Science and Technology,Tangshan 063009,China;2.Mining Development and Safety Technology Key Lab of Hebei Province,Tangshan 063009,China
  • Online:2016-02-15 Published:2016-03-11

摘要: 结合现场爆破地震监测数据,通过有限元数值模拟的方法提出了爆破振动作用下边坡动力安全系数时程变化的计算方法。该方法以动力有限元时程分析得到边坡安全系数随爆破载荷加强而不断降低的变化特征,当边坡安全系数为1时,边坡处于临界状态,此时边坡承载的振动速度即为临界破坏振速,通过插值法计算得到边坡临界破坏振动速度,并结合爆破地震波的传播规律反推得到爆破安全距离,为矿山边坡维护以及生产爆破提供科学有效的参考。

关键词: 动载作用, 边坡稳定性, 临界振速, 安全距离, 数值模拟

Abstract: Though the finite element numerical simulation,the method which is used to calculate the slope dynamic safety factor is put forward,combined with monitoring data of blasting ground vibration.Through the dynamic finite element and time-histories analysis,the change characteristics that safety factor declines with the blasting loading increase is obtained.When the safety factor is one,the slope is in the critical state.At this moment,the particle velocity is the critical value,and the slope critical vibration velocity is calculated out by the interpolation method.Combined with the blasting seismic wave propagation law,blasting safety distance is gained inversely,which provides scientific and effective reference for the slope maintenance and production blasting.

Key words: Dynamic loading, Slope stability, Critical vibration velocity, Safety distance, Numerical simulation