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首页> 外文期刊>International Journal of Mining and Geo-Engineering >Numerical Analysis of the Primer Location Effect on Ground Vibration Caused by Blasting
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Numerical Analysis of the Primer Location Effect on Ground Vibration Caused by Blasting

机译:底漆位置对爆破引起的地面振动影响的数值分析

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Ground vibration is one of the undesirable results of blasting operations. Different methods have been proposed to predict and control ground vibration that is caused by blasting. These methods can be classified as laboratory studies, fieldwork and numerical modeling. Among these methods, numerical modeling is the one which saves time and cuts costs since it takes into account the basic principles of mechanics and provides step by step time-domain solutions. In order to use numerical analysis in predicting the results of blasting operations, the accuracy of the output must be verified through field test. In this study, ground vibration caused by blasting in a field operation in Miduk Copper Mine was recorded using 3-components seismometers of the Vibracord seismograph and analyzed by Vibration-Meter software. Propagation of the waves caused by blasting in the mine slope was modeled using discrete element logic in the UDEC numerical software and compared to the results of the field test. Having tested the accuracy of the results obtained, the effect of primer location and the direction of detonation propagation in the blast hole on the rate of ground vibration caused by blasting was investigated. The results show that by changing primer location from the bottom of the hole to its top, the rate of ground vibration caused by blasting increases.
机译:地面振动是爆破作业的不良结果之一。已经提出了不同的方法来预测和控制由爆破引起的地面振动。这些方法可以分为实验室研究,野外工作和数值建模。在这些方法中,数值建模是一种节省时间并降低成本的方法,因为它考虑了力学的基本原理并提供了逐步的时域解决方案。为了将数值分析用于预测爆破效果,必须通过现场测试来验证输出的准确性。在这项研究中,使用Vibracord地震仪的三分量地震仪记录了Miduk铜矿现场作业中爆破引起的地面振动,并通过Vibration-Meter软件进行了分析。在UDEC数值软件中使用离散元素逻辑对矿山边坡爆破引起的波传播进行了建模,并与现场测试的结果进行了比较。在测试了所得结果的准确性之后,研究了底药位置和爆破孔中的爆轰传播方向对爆破引起的地面振动速率的影响。结果表明,通过改变底漆从孔底到顶部的位置,爆破引起的地震动速率增加。

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