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Mining Publication: Geotechnical Factors Influencing Violent Failure in U.S. Mines
Keywords: Bumps Health and safety management
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: March 1997
Authors: H Maleki, BG White
Conference Paper - March 1997
Download PDF Document (0.83 MB)
NIOSHTIC2 Number: 20023775
In: E. Broch, A. Myrvang, G. Stjern, eds. Proc Intl Symp on Rock Support: Applied Solutions for Underground Structures, 1997; :208-221
Sudden, violent failures of rock around mine openings influence access, ventilation, and safety in both hard-rock and coal mines. To develop predictive tools for assessing the potential for violent failure, the authors initiated a comprehensive study using (1) multiple linear regression and numerical modeling analyses of geological and mining conditions at 25 sites to identify the most significant factors contributing to stress bumps in coal mines and (2) investigations of the geological and mining factors contributing to rock bursts in the Coeur d' Alene Mining District of northern Idaho, particularly the influence of preexisting structures on rock bursts. Twenty-five factors were initially considered in the study of coal bumps. The most important variables were identified as (1) mechanical properties of strata, (2) gate road geometry and/or gate pillar factors of safety, (3) roof beam thickness, joint spacing, and stiffness characteristics, and (4) stress gradients associated with previous mining and anomalous geologic conditions. In the Coeur d' Alene district, burst damage related to preexisting structures results primarily from (1) sudden buckling and crushing of rock layers where surfaces of development and production openings lie at low angles to bedding, faults, or other planar structures and (2) disturbance of loose ground caused by seismic fault-slip on preexisting faults or previously sheared bedding planes that intersect veins near pillar-stope margins.
Image of publication Geotechnical Factors Influencing Violent Failure in U.S. MinesConference Paper - March 1997
Download PDF Document (0.83 MB)
NIOSHTIC2 Number: 20023775
In: E. Broch, A. Myrvang, G. Stjern, eds. Proc Intl Symp on Rock Support: Applied Solutions for Underground Structures, 1997; :208-221
See Also
60 Years of Rockbursting in the Coeur D'Alene District of Northern Idaho, USA: Lessons Learned and Remaining Issues
Behavior of a Coal Pillar Prone to Burst in the Southern Appalachian Basin of the United States
Coal Bumps and Odd Dynamic Phenomena - A Numerical Investigation
Development of a Statistical-Analytical Approach for Assessing Coal Bump Potential
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Dynamic Failure in Deep Coal: Recent Trends and a Path Forward
Preventing Equipment Related Injuries in Underground U.S. Coal Mines
Programmable Electronic Mining Systems: Best Practice Recommendations (In Nine Parts): Part 2: 2.1 System Safety
Programmable Electronic Mining Systems: Best Practice Recommendations (In Nine Parts): Part 8: 6.0 Safety File Guidance
Work Practices to Manage Bump Prone Ground
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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