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Mining Publication: Controlling Roof Beam Failures From High Horizontal Stresses in Underground Stone Mines
Keywords: Horizontal stress Stone mining Support design and selection
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: August 1998
Authors: AT Iannacchione, DR Dolinar, LJ Prosser, TE Marshall, DC Oyler, CS Compton
Conference Paper - August 1998
Download PDF Document (0.84 MB)
NIOSHTIC2 Number: 20000096
Proceedings of the 17th International Conference on Ground Control in Mining, Peng SS, ed., Morgantown, WV: University of West Virginia, 1998 Aug 4-6, 1998 Aug; :102-112
The U.S., Australian, and United Kingdom coal and the Canadian hard rock mining industries have long recognized the significance of high horizontal stresses as a factor affecting the stability of roof and rib conditions in underground mines. Recently, a growing segment of the U.S. underground stone mining industry has also begun to recognize that horizontal stresses occur in some of its more than 90 mines. Considering the typically high strength and massive nature of limestone, this fact is a revelation in itself. High horizontal stresses produce extensive and sudden rock failures and, in some cases, resulted in injuries to mine workers. Through the years diverse control strategies have been proposed and experimented with. Reorientation of mine entries to reduce stress concentrations have been proven successful and are widely accepted in practice. Other solutions, like rock reinforcement, are poorly understood and are less accepted in practice. It is the purpose of this National Institute for Occupational Safety and Health (NIOSH) study to develop a better fundamental understanding of these ground control strategies under high horizontal stress conditions through a series of field and laboratory studies. To this end a design technique is presented which provides stone miners with a method for making stability assessments. The consequences of widening rooms, changing geology and horizontal stresses, and different rock bolts on roof beam failures are discussed.
Image of publication Controlling Roof Beam Failures From High Horizontal Stresses in Underground Stone MinesConference Paper - August 1998
Download PDF Document (0.84 MB)
NIOSHTIC2 Number: 20000096
Proceedings of the 17th International Conference on Ground Control in Mining, Peng SS, ed., Morgantown, WV: University of West Virginia, 1998 Aug 4-6, 1998 Aug; :102-112
See Also
A Computer Software Program that Estimates Air Quantity Requirements in Large Opening Stone Mines
Effect of the Dip and Excavation Orientation on Roof Stability in Moderately Dipping Stone Mine Workings
Field Observations and Numerical Studies of Horizontal Stress Effects on Roof Stability in U.S. Limestone Mines
Field Observations and Numerical Studies of Horizontal Stress Effects on Roof Stability in U.S. Limestone Mines
Horizontal Stress
Investigation of Pillar-Roof Contact Failure in Northern Appalachian Stone Mine Workings
Performance of Roof Support Under High Stress in a U.S. Coal Mine
Pillar and Roof Span Design Guidelines for Underground Stone Mines
Preventing Injuries Caused by Unrecognized Stone Mine Roof Beam Failures With a Pro-Active Roof Control Plan
Roof Span Design for Underground Stone Mines
Roof Stability Issues in Underground Limestone Mines in the United States
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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