自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 20    No. 2    February 2013

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3-D numerical modelling of domino failure of hard rock pillars in Fetr6 Chromite Mine, Iran, and comparison with empirical methods
S. Dehghan1, K. Shahriar2, P. Maarefvand2, K. Goshtasbi3

1. Department of Mining Engineering, Science and Research Branch, Islamic Azad University,
Tehran 14155-4933, Iran;
 2. Department of Mining and Metallurgical Engineering, Amirkabir University of Technology,
Tehran 15875-4413, Iran;
3. Department of Mining Engineering, Tarbiat Modares University, Tehran 14115-143, Iran

Abstract:Fetr6 is an underground mine using the stope-and-pillar mining method. As there was some evidence regarding pillar failure in this mine, improving works such as roof support and replacing existing pillars with concrete pillars (CP) were carried out. During the construction of the second CP, in the space between the remaining pillars, one of the pillars failed leading to the progressive failure of other pillars until 4 000 m2 of mine had collapsed within a few minutes. In this work, this phenomenon is described by applying both numerical and empirical methods and the respective results are compared. The results of numerical modelling are found to be closer to the actual condition than those of the empirical method. Also, a width-to-height (W/H) ratio less than 1, an inadequate support system and the absence of a detailed program for pillar recovery are shown to be the most important causes of the Domino failure in this mine.

 

Key words: hard rock; domino failure; numerical modelling; empirical method; stope; pillar; extraction ratio; W/H ratio

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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