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Mining Publication: Failure Characteristics of Roof Falls at an Underground Stone Mine in Southwestern Pennsylvania
Keywords: Limestone Mine design Pennsylvania Support design and selection
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: August 2001
Authors: AT Iannacchione, TE Marshall, LJ Prosser
Conference Paper - August 2001
Download PDF Document (0.61 MB)
NIOSHTIC2 Number: 20021339
In: Peng SS, Mark C, Khair AW, eds. Proceedings of the 20th International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001 Aug; :119-125
The location and time of 2,007 microseismic emissions from a limestone mine in southwestern Pennsylvania were compared with the development of mine faces and the characteristics of the mine layout. Based on analyses of these results, the occurrence of roof failure zones appears to be associated with certain characteristics of the mine plan. It was determined that significant relationships exist between the intensity of the microseismic activity and the scale of the roof failures. Microseismic activity associated with these roof falls occurs in distinct episodes, with the final failure event occurring during approximately a 12-hour periods. Each roof fall episode appears to be composed of dozens of distinct roof beam failures. As each beam fails in shear and tension, tens to hundreds of audible noises representing rock fracturing or bedding plane separation can occur. While every roof fall can be viewed as unique, certain mechanistic similarities can be realized through careful observation and monitoring of these complex systems. Understanding these similarities in characteristics allows mine personnel to design the most effective and efficient control technique.
Image of publication Failure Characteristics of Roof Falls at an Underground Stone Mine in Southwestern PennsylvaniaConference Paper - August 2001
Download PDF Document (0.61 MB)
NIOSHTIC2 Number: 20021339
In: Peng SS, Mark C, Khair AW, eds. Proceedings of the 20th International Conference on Ground Control in Mining. Morgantown, WV: West Virginia University, 2001 Aug; :119-125
See Also
Blast Damage Control to Reduce Injuries from Ground Falls in Underground Western U.S. Hard Rock Mines
Case History of the Response of a Longwall Entry Subjected to Concentrated Horizontal Stress
Effect of the Dip and Excavation Orientation on Roof Stability in Moderately Dipping Stone Mine Workings
Mistakes, Misconceptions, and Key Points Regarding Secondary Roof Support Systems
Observations and Evaluation of Floor Benching Effects on Pillar Stability in U.S. Limestone Mines
An Overview of Geomechanics Safety Research on Mobile Roof Supports
Performance of Roof Support Under High Stress in a U.S. Coal Mine
Roof Stability Issues in Underground Limestone Mines in the United States
Stability Analysis of a Backfilled Room-and-Pillar Mine
Toward Pillar Design To Prevent Collapse of Room-and-Pillar Mines
Page last reviewed: May 18, 2015
Page last updated: May 18, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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