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Mining Publication: A Case Study of Multi-Seam Coal Mine Entry Stability Analysis with Strength Reduction Method
Keywords: Ground stability Multiple seam mining Numerical modeling
Original creation date: March 2016
Authors: IB Tulu, G Esterhuizen, TM Klemetti, MM Murphy, J Sumner, M Sloan
Peer Reviewed Journal Article - March 2016
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NIOSHTIC2 Number: 20047407
Int J Min Sci Technol 2016 Mar; 26(2):193-198
In this paper, the advantage of using numerical models with the strength reduction method (SRM) to evaluate entry stability in complex multiple-seam conditions is demonstrated. A coal mine under variable topography from the Central Appalachian region is used as a case study. At this mine, unexpected roof conditions were encountered during development below previously mined panels. Stress mapping and observation of ground conditions were used to quantify the success of entry support systems in three room-and-pillar panels. Numerical model analyses were initially conducted to estimate the stresses induced by the multiple-seam mining at the locations of the affected entries. The SRM was used to quantify the stability factor of the supported roof of the entries at selected locations. The SRM-calculated stability factors were compared with observations made during the site visits, and the results demonstrate that the SRM adequately identifies the unexpected roof conditions in this complex case. It is concluded that the SRM can be used to effectively evaluate the likely success of roof supports and the stability condition of entries in coal mines.
Cover image for A Case Study of Multi-Seam Coal Mine Entry Stability Analysis with Strength Reduction MethodPeer Reviewed Journal Article - March 2016
Go to Web Page
NIOSHTIC2 Number: 20047407
Int J Min Sci Technol 2016 Mar; 26(2):193-198
See Also
Analysis of Monitored Ground Support and Rock Mass Response in a Longwall Tailgate Entry
A Case Study of the Stability of a Non-typical Bleeder Entry System at a U.S. Longwall Mine
Exploration of Limestone Pillar Stability in Multiple-level Mining Conditions Using Numerical Models
Ground Stress in Mining (Part 1): Measurements and Observations at Two Western U.S. Longwall Mines
Ground Stress in Mining (Part 2): Calibrating and Verifying Longwall Stress Models
Multiple-Seam Mining in the United States: Background
Pillar Strength and Design Methodology for Stone Mines
Proceedings: New Technology for Ground Control in Multiple-seam Mining
Simplified Pre- and Post-Processing Technique for Performing Finite-Element Analyses of Deep Underground Mines
Using Site Case Histories of Multiple Seam Coal Mining to Advance Mine Design
Page last reviewed: March 7, 2017
Page last updated: March 7, 2017
Content source: National Institute for Occupational Safety and Health, Mining Program
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