峨眉黄山石灰石矿台阶边坡爆破振速安全阀值研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (14) : 125-129.

论文

余海兵，胡斌，冉秀峰，李俊，祝凯

作者信息 +

Safety Thershold of Blasting Vibration Velocity to Ermei Mount Huangshang Limestone Stairs Slope

HU Bin ，YU Hai-bing，RAN Xiu-feng ，LI Jun

Author information +

文章历史 +

摘要

爆破振速幅值的控制对边坡的稳定性起着重要的作用，以峨眉黄山石灰石矿山台阶边坡为例，采用拟静力法研究含软弱层边坡，倾角 =15°~34°，临界高度 =5m~14m在安全系数为1.1情况下的安全阀值；采用应力判别法得出灰岩的安全阀值；采用FLAC3D有限差分法对边坡进行动力响应分析，对边坡关键监测点的位移，塑性区云图、剪应变增量云图、关键点的主振速度进行综合分析，得出边坡在临界状态下的安全阀值；通过对算例的研究分析得出，拟静力法得出的安全阀值和数值模拟动力分析的计算结果接近，互相印证了对安全阀值的取值比较合理。最后综合以上三种方法对爆破振速安全阀值进行合理取值。

Abstract

For the slope stability ,the blasting vibration velocity amplitude plays an important role. A case study in Ermei mount Huangshan limestone bench slope ,which using pseudo-static method on the slope with weak layer under the condition of dip =15°~34°, critical height =5~14m and safety factor=1.1. It obtains the safety thershold of limestone by use of stress criterion; Using FLAC3D finite difference method for the dynamic response analysis of the slope , displacement of the slope of the key monitoring points, plastic area cloud, shear strain increment cloud and the key points of the main vibration velocity are analyzed and the slope safety threshold in the critical state are obtained. Based on the results of the case study, the safety threshold which is calculated respectively by pseudo-static method and numerical simulation of dynamic analysis is close. It is confirmed that the value of the safety threshold is reasonable. Finally, the above three methods are conbined to get the reasonable values of the safety threshold of blasting vibration velocity.

导出引用

余海兵，胡斌，冉秀峰，李俊，祝凯. 峨眉黄山石灰石矿台阶边坡爆破振速安全阀值研究[J]. 振动与冲击, 2016, 35(14): 125-129

HU Bin,YU Hai-bing，RAN Xiu-feng,LI Jun. Safety Thershold of Blasting Vibration Velocity to Ermei Mount Huangshang Limestone Stairs Slope[J]. Journal of Vibration and Shock, 2016, 35(14): 125-129

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