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Appears in Collections:Management, Work and Organisation Conference Papers and Proceedings
Peer Review Status: Refereed
Author(s): Oraee, Kazem
Hosseini, Navid
Gholinejad, Mehran
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Title: Coal Pillar Strength Based On The Ground Reaction Curve – A New Approach
Editor(s): Peng, Syd S
Mark, Christopher
Finfinger, Gerry
Tadolini, Steve
Khair, A Wahab
Heasley, Keith
Luo, Yi
Barczak, Tom
Citation: Oraee K, Hosseini N & Gholinejad M (2009) Coal Pillar Strength Based On The Ground Reaction Curve – A New Approach. In: Peng SS, Mark C, Finfinger G, Tadolini S, Khair AW, Heasley K, Luo Y & Barczak T (eds.) Proceedings: 28th International Conference on Ground Control in Mining (ICGCM) 28th International Conference on Ground Control in Mining (ICGCM), Morgantown, West Virginia, USA, 28.07.2009-30.07.2009. Morgantown, West Virginia USA: Department of Mining Engineering, College of Engineering and Mineral Resources, West Virginia University.
Issue Date: Jan-2009
Date Deposited: 3-Jun-2010
Conference Name: 28th International Conference on Ground Control in Mining (ICGCM)
Conference Dates: 2009-07-28 - 2009-07-30
Conference Location: Morgantown, West Virginia, USA
Abstract: In underground coal mining, particularly room-and-pillar methods, the coal pillars play a significant role in roof stability. If the pillar dimensions are increased, the pillar bearing capacity also increases, but more coal remains in the pillar and therefore the recovery of mining operation decreases. Therefore, determining the optimum pillar dimension based on technical, economical and performance parameters is important. In this paper, the coal pillar is designed by using the concept of ground reaction curve (GRC). For this purpose, the GRC for coal pillars is drawn and then the elastic and plastic zone of coal pillar behavior is determined. Based on elastic and plastic zone, different equations are presented to draw a pillar reaction curve and the process of coal pillar design based on GRC is explained. As a case study, this new technique is applied to study the coal pillar state in Tabas coal mine of Iran. The results show that the presented new approach is successfully used in the design of the optimum coal pillar dimensions, and also determines the elastic and plastic behavior limit, which is important especially for the logical design of yield pillars.
Status: AM - Accepted Manuscript
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