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Mining Publication: Design Methods to Control Violent Pillar Failures in Room-and-Pillar Mines
Keywords: Mine design Pillar design
Original creation date: September 1997
Authors: RK Zipf, C Mark
Peer Reviewed Journal Article - September 1997
Download PDF Document (0.65 MB)
NIOSHTIC2 Number: 20022911
Inst Min Metall, Trans, Sect A: Min Ind, 1997 Sep 106():A124-A132
The sudden, violent collapse of large areas of room-and-pillar mines poses a special hazard for miners and mine operators. This type of failure, termed a ‘cascading pillar failure' (CPF), occurs when one pillar in a mine layout falls, transferring its load to neighboring pillars, which causes them to fail, and so forth. Recent examples of this kind of failure in coal, metal and non-metal mines in the U.S.A. are documented. Mining engineers can limit the danger presented by these failures through improved mine design practices. Whether failure occurs in a slow, non-violent manner or in a rapid, violent manner is governed by the local mine stiffness stability criterion. This stability criterion is used as the basis for three design approaches to control cascading pillar failure in room-and-pillar mines the containment approach, the prevention approach and the full extraction mining approach. These design approaches are illustrated with practical examples for coal mining at shallow depth.
Image of publication Design Methods to Control Violent Pillar Failures in Room-and-Pillar MinesPeer Reviewed Journal Article - September 1997
Download PDF Document (0.65 MB)
NIOSHTIC2 Number: 20022911
Inst Min Metall, Trans, Sect A: Min Ind, 1997 Sep 106():A124-A132
See Also
ALPS - Analysis of Longwall Pillar Stability - 5.4.02
AMSS - Analysis of Multiple Seam Stability - 2.1.02
ARMPS - Analysis of Retreat Mining Pillar Stability - 6.2.02
Coal Mine Bumps: Five Case Studies in the Eastern United States
Pillar Design Issues for Underground Stone Mines
Proceedings: New Technology for Ground Control in Retreat Mining
The State-of-the-Art in Coal Pillar Design
Technology News 516 - ARMPS-HWM: New Software for Sizing Pillars for Highwall Mining
Toward Pillar Design To Prevent Collapse of Room-and-Pillar Mines
Using the Coal Mine Roof Rating (CMRR) to Assess Roof Stability in U.S. Coal Mines
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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