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Mining Publication: Deep Cover Pillar Recovery in the US
Keywords: Barrier pillars Bumps Multiple seam mining Pillar design Retreat mining
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: July 2009
Authors: C Mark
Conference Paper - July 2009
Download PDF Document (0.26 MB)
NIOSHTIC2 Number: 20035812
Proceedings of the 28th International Conference on Ground Control in Mining, July 28-30, 2009, Morgantown, West Virginia. Peng SS, Barczak T, Mark C, Tadolini S, Finfinger G, Heasley K, Luo Y, eds., Morgantown, WV: West Virginia University, 2009 Jul; :1-9
In the wake of the Crandall Canyon mine disaster, the U.S. Congress asked the National Institute for Occupational Health and Safety (NIOSH) to study the safety of deep cover pillar recovery operations in the US. The legislation defined "deep cover" to be greater than 1,500 ft, but NIOSH is also evaluating mines at depths greater than 1,000 ft when multiple seam interactions are encountered. By these definitions, there about 35 active mines that engage in deep cover pillar recovery, in the states of UT, CO, VA, WV, and KY. To date, NIOSH has documented ground conditions and ground control experience at nearly all of them. This paper provides an overview of current deep cover pillar recovery practice. Specific ground control issues that are discussed include: Pillar recovery sequences, Pillar and barrier pillar design, Coal bumps, Thick seam pillar extraction, and Multiple seam interactions.
Image of publication Deep Cover Pillar Recovery in the USConference Paper - July 2009
Download PDF Document (0.26 MB)
NIOSHTIC2 Number: 20035812
Proceedings of the 28th International Conference on Ground Control in Mining, July 28-30, 2009, Morgantown, West Virginia. Peng SS, Barczak T, Mark C, Tadolini S, Finfinger G, Heasley K, Luo Y, eds., Morgantown, WV: West Virginia University, 2009 Jul; :1-9
See Also
ARMPS - Analysis of Retreat Mining Pillar Stability - 6.2.02
Coal Mine Bumps: Five Case Studies in the Eastern United States
Deep Cover Pillar Extraction in the U.S. Coalfields
Optimum Mine Designs to Minimize Coal Bumps: A Review of Past and Present U.S. Practices
Pillar Design and Strategies for Retreat Mining
Proceedings: New Technology for Ground Control in Retreat Mining
Research Report on the Coal Pillar Recovery Under Deep Cover
The State-of-the-Art in Coal Pillar Design
Technology News 464 - Analysis of Retreat Mining Pillar Stability (ARMPS): Version 4.0 for Windows
Technology News 516 - ARMPS-HWM: New Software for Sizing Pillars for Highwall Mining
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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