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Development of a statistical-analytical approach for assessing coal bump potential.

Authors
Maleki-H; Zahl-EG; Dunford-JP
Source
Proceedings of the 16th International Conference on Ground Control in Mining, August 5-7, 1997, Morgantown, West Virginia. Peng SS, Holland CT, eds., Morgantown, WV: West Virginia University, 1997 Aug; :304-310
Link
NIOSHTIC No.
20022993
Abstract
Coal bumps are defined as sudden failures of rock and coal near entries that are of such a magnitude that they expel large amounts of material into a mine opening. Coal bumps are influenced by geologic conditions, the geometric design of coal mine excavations, and the sequence and rate of extraction. Researchers from private industry and the National Institute for Occupational Safety and Health have studied mechanisms of violent failure and have identified individual factors that contribute to coal bumps. In an attempt to develop tools for assessing coal bump potential, the authors initiated a comprehensive study using information from 25 case studies undertaken in U.S. mines. Multiple linear regression and numerical modeling analyses were used to identify the most significant variables contributing to coal bumps (excluding bumps related to fault-slip). Twenty-five geological, geometrical, and geomechanical variables were considered initially. The most important of these variables were then identified as (1) energy as calculated using the mechanical properties of the strata, depth of overburden, and joint density, (2) mining method, (3) pillar factor of safety, and (4) stress gradient and yield characteristics.
Keywords
Coal-mining; Mining-industry; Underground-mining; Geology; Rock-falls; Injuries; Accidents; Statistical-analysis
Publication Date
19970805
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Holland-CT
Fiscal Year
1997
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
NIOSH Division
SRL
Priority Area
Other Occupational Concerns
Source Name
Proceedings of the 16th International Conference on Ground Control in Mining, August 5-7, 1997, Morgantown, West Virginia
State
WA; WV
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