An investigation of longwall failure using 3D numerical modelling – A case study at a copper mine

IF 0.7 Q4 MECHANICS

Studia Geotechnica et Mechanica Pub Date : 2021-10-07 DOI:10.2478/sgem-2021-0019

P. M. V. Nguyen, Tomasz Olczak, Sywester Rajwa

引用次数: 1

Abstract

Abstract It is well-known that the longwall mining method (with roof caving) is widely used in underground mining extraction for bedded deposits (e.g. coal) due to its numerous advantages. Generally, this method is not commonly applied for ore deposits such as copper deposit. In Poland, the longwall mining method has been tested for thin copper deposits at the Polkowice-Sieroszowice copper mine (KGHM). Various failure modes were observed during longwall operation in the 5A/1 panel. This paper aims to examine these occurred failures. To do so, an analysis has been conducted using 3D numerical modelling to investigate the failure mode and mechanism. Based on the 3D numerical modelling results with extensive in situ measurements, causes of failure are determined and practical recommendations for further copper longwall operations are presented.

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基于三维数值模拟的长壁破坏研究——以某铜矿为例

摘要长壁崩落法由于其诸多优点，在层状矿床(如煤)的地下开采中得到了广泛的应用。一般来说，这种方法不常用于铜矿等矿床。在波兰，在Polkowice-Sieroszowice铜矿(KGHM)对薄铜矿进行了长壁采矿方法的试验。5A/1面板在长壁作业过程中观察到多种破坏模式。本文旨在研究这些已发生的故障。为此，使用三维数值模拟进行了分析，以研究破坏模式和机制。基于三维数值模拟结果和大量的现场测量，确定了失效原因，并提出了进一步铜长壁作业的实用建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Studia Geotechnica et Mechanica MECHANICS-

CiteScore

1.30

自引率

16.70%

发文量

审稿时长

16 weeks

期刊介绍： An international journal ‘Studia Geotechnica et Mechanica’ covers new developments in the broad areas of geomechanics as well as structural mechanics. The journal welcomes contributions dealing with original theoretical, numerical as well as experimental work. The following topics are of special interest: Constitutive relations for geomaterials (soils, rocks, concrete, etc.) Modeling of mechanical behaviour of heterogeneous materials at different scales Analysis of coupled thermo-hydro-chemo-mechanical problems Modeling of instabilities and localized deformation Experimental investigations of material properties at different scales Numerical algorithms: formulation and performance Application of numerical techniques to analysis of problems involving foundations, underground structures, slopes and embankment Risk and reliability analysis Analysis of concrete and masonry structures Modeling of case histories

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