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Design of crown pillar thickness using finite element method and multivariate regression analysis

机译:冠柱厚度设计的有限元和多元回归分析

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摘要

Minerals are now being extracted from deep mines due to drying up of resource in shallow ground. The need for suitable supports and ground control mechanisms for safe mining necessitates proper pillar design with filling technology. In addition, high horizontal stress may cause collapse of hanging wall and footwall rocks, hence designing of suitable crown pillars is absolutely necessary for imposing overall safety of the stopes. This paper provides a methodology for the evaluation of the required thickness of crown pillars for safe operation at depth ranging from 600 m to 1000 m. Analyses are conducted with the results of 108 non-linear numerical models considering Drucker-Prager material model in plane strain condition. Material properties of ore body rock and thickness of crown pillars are varied and safety factors of pillars estimated. Then, a generalized statistical relationship between the safety factors of crown pillars with the various input parameters is developed. The developed multivariate regression model is utilized for generating design/stability charts of pillars for different geo-mining conditions. These design charts can be used for the design of crown pillar thickness with the depth of the working, taking into account the changes of the rock mass conditions in underground metal mine.
机译:由于浅层土地资源枯竭,目前正在从深部矿山开采矿物。为了安全开采需要合适的支撑和地面控制机制,因此需要采用填充技术进行适当的立柱设计。此外,高的水平应力可能会导致悬挂的壁和下壁的岩石倒塌,因此,为提高采场的总体安全性,设计合适的冠状立柱绝对必要。本文提供了一种方法,用于评估在600 m至1000 m深度范围内安全操作所需的顶冠厚度。考虑了在平面应变条件下考虑Drucker-Prager材料模型的108个非线性数值模型的结果,进行了分析。矿体岩石的材料特性和冠顶柱的厚度各不相同,并且估计了柱顶的安全系数。然后,建立了具有各种输入参数的拱顶安全系数之间的广义统计关系。所开发的多元回归模型用于生成针对不同地质开采条件的支柱的设计/稳定性图表。考虑到地下金属矿山中岩体条件的变化,这些设计图可用于根据工作深度设计冠顶柱厚度。

著录项

  • 来源
    《矿业科学技术学报:英文版》 |2017年第006期|P.955-964|共10页
  • 作者单位

    [1]Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;

    [2]Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721302, India;

    [1]Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;

    [2]Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721302, India;

    [1]Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India;

    [2]Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721302, India;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 CHI
  • 中图分类 矿业工程;
  • 关键词

    Cut and fill mining; Crown pillar; FEM; Regression model; Design chart;

    机译:挖填采矿;冠柱;有限元;回归模型;设计图;
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