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Application of geogrids in waste dump stability: a numerical modeling approach

机译：土工格栅在垃圾场稳定性中的应用：一种数值模拟方法

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摘要

Geosynthetic is widely used to reinforce the weak rock mass, mine waste dump, soil slopes road cut slopes, etc. The present paper discusses the effect of geogrids on the stability of mine waste dump. The stability of mine waste dump has been done by Fast Langrage Analysis of Continua (FLAC) slope software, which is based on finite difference method. Reinforcement by geogrids mainly depends on the tensile strength, aperture size of geogrids, and particle size distribution of dump rock mass. Different permutations and combinations of spacing between two geogrid sheets have been taken into consideration to study the stability of mine waste dump. The factor of safety is calculated to quantify the effect of geogrids on waste dump slope. It has been observed from numerical modeling that the maximum slope angle is 45° at a height of 10 m. The scope of increasing slope angle from 45 to 60° is evaluated using geogrids. It has been found from the study that the factor of safety increases as the spacing between geogrids decreases. Maximum strain is also plotted of each case to identify the slip circle. The positions of geogrids modify the probable slip circle or failure plane of mine waste dump. Using ten geogrids at a spacing of 1 m, the slope angle can be increased up to 60° with factor of safety of 1.4.
机译：土工合成材料被广泛用于加固弱岩体，矿山垃圾场，土质边坡，路cut边坡等。本文讨论了土工格栅对矿山垃圾场稳定性的影响。矿山垃圾场的稳定性已通过基于有限差分法的连续体快速语言分析（FLAC）边坡软件来完成。土工格栅的加固作用主要取决于土工格栅的抗拉强度，孔径大小以及堆石料的粒径分布。为了研究矿山垃圾场的稳定性，已经考虑了两个土工格栅板之间的不同排列和间距的组合。计算安全系数以量化土工格栅对垃圾场边坡的影响。从数值模型已经观察到，在10m的高度处最大倾斜角为45°。使用土工格栅评估将倾斜角从45°增加到60°的范围。从研究中发现，安全系数随着土工格栅之间的间距减小而增加。还绘制了每种情况的最大应变，以识别滑移圆。土工格栅的位置会改变矿山垃圾场的可能滑移圆或破坏平面。使用十个间隔为1 m的土工格栅，可以将倾斜角增加到60°，安全系数为1.4。

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  • 来源
    《Environmental earth sciences》 |2012年第5期|p.1459-1465|共7页
  • 作者

    Rajesh Rai; Manoj Khandelwal; Ashok Jaiswal;

  • 作者单位

    Institute of Technology, Banaras Hindu University, Varanasi 221 005, India;

    Department of Mining Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur 313 001, India;

    Institute of Technology, Banaras Hindu University, Varanasi 221 005, India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    geogrids; FLAC; dump slope; factor of safety;

    机译：土工格栅FLAC;排土场安全因素;

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