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首页> 外文期刊>The Indian mining & engineering journal >Slope Stability Issues in the Opencast Limestone and Iron Ore Mines in India - Case Studies
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Slope Stability Issues in the Opencast Limestone and Iron Ore Mines in India - Case Studies

机译：印度露天石灰石和铁矿石矿山的边坡稳定性问题-案例研究

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摘要

The stability of opencast mine slopes is important for the safe and economic mining operations. The practical approach to slope stability is guided by the basic geological data, geo-technical characteristics of the slope mass, ground water details and a good measure of engineering judgment. This paper presents in brief the slope stability studies conducted by the author in different Indian opencast mines in limestone and iron ore sectors. Based on the author's experience of slope stability studies in over 30 different opencast mines, the basic recommendations and issues, which are applicable to opencast mines in Indian geo-mining conditions in general are outlined. The slope forming materials have included different types of soils and very poor to fair rock masses. The Bieniawski's Rock Mass Rating of these rock masses have typically varied from 20 to 45. The studies broadly include the design of ultimate and working pit slopes and post failure investigations aimed at back analysis and identification of causative factors. It is observed that the slope failure problems typically occur during rainy season and the failures are mostly triggered by rain water, which infiltrates into the slope mass and builds up the pore-water pressure. The studies have revealed that judicious planning and implementation of appropriate slope monitoring and geotechnical investigation schemes can help in identifying the vulnerable slope sections, predict instabilities, evolve control strategies and even mining under unstable slope conditions.
机译：露天矿山边坡的稳定性对于安全经济的采矿作业至关重要。边坡稳定性的实用方法是由基本地质数据，边坡岩体的岩土技术特征，地下水细节和良好的工程判断方法指导的。本文简要介绍了作者在石灰岩和铁矿石领域的不同印度露天矿中进行的边坡稳定性研究。根据作者对30多个露天矿的边坡稳定性研究的经验，概述了适用于一般印度地质采矿条件下露天矿的基本建议和问题。边坡形成材料包括不同类型的土壤，并且岩石质量差至中等。这些岩石的Bieniawski岩石质量等级通常在20到45之间变化。研究广泛包括极限和工作坑斜率的设计以及旨在进行反分析和确定成因的后破坏研究。可以观察到，边坡破坏问题通常发生在雨季，并且破坏主要是由雨水触发的，雨水渗入斜坡物质并增加了孔隙水压力。研究表明，明智的规划和实施适当的边坡监测与岩土工程勘测方案，有助于识别易受伤害的边坡部分，预测失稳，发展控制策略，甚至在不稳定的边坡条件下进行开采。

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