地震作用下某矿山排土场边坡稳定性分析
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摘要
以唐山市某矿山排土场边坡为例,利用数值模拟软件GeoStudio研究其在不同地震烈度作用下的稳定性,通过分析该边坡在3种加速度峰值下的安全系数变化情况可知,当软件输入的地震波加速度峰值不断增大时,该矿山排土场边坡的安全系数不断降低。在地震作用下,当引起排土场边坡产生滑塌的屈服加速度大于地震波的加速度峰值时,边坡处于相对稳定状态;而当地震波加速度峰值大于边坡发生滑塌的屈服加速度时,排土场边坡的稳定性将大幅度降低直至失稳。
With the slope of a mine dump in Tangshan City as an example,its stability under different seismic intensities is analyzed using the numerical simulation software Geo Studio.Analysis of the variation of safety factor for the slope under three acceleration peaks shows that the peak of seismic wave by the software input increases constantly,the safety factor for dump slope for the mine decreases steadily.When the yield acceleration for the collapse of dump slope under the action of earthquake is greater than the peak of seismic wave,the dump slope is relatively stable.And when the peak of seismic wave acceleration is greater than the yield acceleration at collapse of the dump slope,the stability of dump slope will be significantly reduced.
With the slope of a mine dump in Tangshan City as an example,its stability under different seismic intensities is analyzed using the numerical simulation software Geo Studio.Analysis of the variation of safety factor for the slope under three acceleration peaks shows that the peak of seismic wave by the software input increases constantly,the safety factor for dump slope for the mine decreases steadily.When the yield acceleration for the collapse of dump slope under the action of earthquake is greater than the peak of seismic wave,the dump slope is relatively stable.And when the peak of seismic wave acceleration is greater than the yield acceleration at collapse of the dump slope,the stability of dump slope will be significantly reduced.
引文
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[5]许名标,夏岸雄.爆破振动对开挖边坡稳定性的影响研究[J].化工矿物与加工,2016,(7):34-38.
[6]李文秀,齐栋梁.露天矿爆破振动影响下边坡失稳预测的综合方法[J].化工矿物与加工,2015,(6):24-26.
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[8]李伟.露天煤矿排土场边坡稳定性分析与治理技术[J].煤炭科学技术,2014,(10):37-40.
[2]谢振华,何娜,栾婷婷.露天矿山排土场滑坡危险性分析及预防对策[J].工业安全与环保,2014,40(2):73-76.
[3]陈荣华,李志海.中国华北地区地震大形势分析[J].内陆地震,2011,25(4):307-310.
[4]罗成彦.地震和降雨作用的矿山排土场稳定性分析[J].工业安全与环保,2016,42(11):12-15.
[5]许名标,夏岸雄.爆破振动对开挖边坡稳定性的影响研究[J].化工矿物与加工,2016,(7):34-38.
[6]李文秀,齐栋梁.露天矿爆破振动影响下边坡失稳预测的综合方法[J].化工矿物与加工,2015,(6):24-26.
[7]张雪岩.三友矿山排土场泥石流触发条件研究[D].唐山:华北理工大学,2015.
[8]李伟.露天煤矿排土场边坡稳定性分析与治理技术[J].煤炭科学技术,2014,(10):37-40.