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Mining Publication: Design Methods to Control Violent Pillar Failures in Room-and-Pillar Mines

Original creation date: September 1997

Image of publication Design Methods to Control Violent Pillar Failures in Room-and-Pillar Mines

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.

Authors: RK Zipf, C Mark

Peer Reviewed Journal ArticleSeptember - 1997

  • Adobe Acrobat - Portable Document Format (.PDF)

    0.65 MB

NIOSHTIC2 Number: 20022911

Inst Min Metall, Trans, Sect A: Min Ind, 1997 Sep 106():A124-A132

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