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Mining Publication: Analysis of Roof Bolt Systems

NOTE: This page is archived for historical purposes and is no longer being maintained or updated.

Original creation date: August 2001

Image of publication Analysis of Roof Bolt Systems

Despite more than half a century of experience with roof bolting, no design method has received wide acceptance. To begin to improve this situation, National Institute for Occupational Safety and Health (NIOSH) conducted a statistical study of roof bolt performance at a number of mines throughout the U.S. Case histories were collected from 37 mines with a variety of roof bolt types and patterns in a wide range of geologic environments. Performance was measured in terms of the number of roof falls that occurred per 10,000 ft of drivage. The study found that roof falls are rare when the roof is strong and the stress is low, even with light roof bolting patterns. The focus of this paper is on the more difficult conditions, where the roof is weaker and/or the stress is higher.

Authors: C Mark, GM Molinda, DR Dolinar

Conference Paper - August 2001

  • 0.32 MB

NIOSHTIC2 Number: 20021382

20th Intl Conf on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001 Aug; :218-225