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Mining Publication: Global Trends in Coal Mine Horizontal Stress Measurements
Keywords: Data analysis Ground control Horizontal stress
This page is archived for historical purposes and is no longer being maintained or updated.
Original creation date: July 2008
Authors: C Mark, M Gadde
Conference Paper - July 2008
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20034278
Proceedings of the 27th International Conference on Ground Control in Mining, July 29 - July 31, 2008, Morgantown, West Virginia. Peng SS, Mark C, Finfinger GL, Tadolini SC, Khair AW, Heasley KA, Luo-Y, eds., Morgantown, WV: West Virginia University, 2008; :319-331
Knowledge of in situ stresses is fundamental to many studies in earth sciences, and coal mine ground control is no exception. During the past 20 years, it has become clear that horizontal stress is a critical factor affecting roof stability in underground coal mines. The theory of plate tectonics and the World Stress Map (WSM) project has been extremely helpful in explaining the sources and the orientations of the horizontal stresses observed underground. Recently, WSM geophysicists studying deep-seated stresses have developed a model of how stress magnitudes vary with depth in the crust. They have devoted relatively little attention to near-surface stresses, however. This paper explores the relationships between deep-seated and shallow in situ stresses in several of the world's coalfields, using a data base of more than 350 stress measurements from underground coal mines. The analysis indicates that distinct regional trends exist, corresponding roughly to the regional stress fields identified by the WSM. The paper presents equations for estimating stress magnitudes that were developed by treating depth and elastic modulus as independent variables in regression analysis. The magnitude of the horizontal stress increases with depth, at rates that range from 0.8 to 2.0 times the vertical stress, just as the WSM "critically stressed crust" model predicts. Overall, it seems that the stress regimes encountered in underground coal mines are closely linked to those that exist deep in the earth's crust.
Image of publication Global Trends in Coal Mine Horizontal Stress MeasurementsConference Paper - July 2008
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20034278
Proceedings of the 27th International Conference on Ground Control in Mining, July 29 - July 31, 2008, Morgantown, West Virginia. Peng SS, Mark C, Finfinger GL, Tadolini SC, Khair AW, Heasley KA, Luo-Y, eds., Morgantown, WV: West Virginia University, 2008; :319-331
See Also
Calibration and Verification of Longwall Stress Models
Computer Simulation of Ground Behaviour and Rock Bolt Interaction at Emerald Mine
Failure Mechanics of Multiple Seam Mining Interactions
Ground Control Issues for Safety Professionals
Horizontal Stress and Longwall Headgate Ground Control
Proceedings: New Technology for Ground Control in Multiple-seam Mining
Rock Bursting and Seismicity During Ramp Development, Lucky Friday Mine, Mullan, Idaho
Task Analysis
Technology News 504 - NIOSH Releases New AHSEM and ARBS Software Programs to Improve Ground Control
Variation of Horizontal Stresses and Strains in Mines in Bedded Deposits in the Eastern and Midwestern United States
Page last reviewed: July 14, 2015
Page last updated: July 14, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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