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Numerical modeling of the gob loading mechanism in longwall coal mines.

Authors
Morsy-K; Peng-SS
Source
Proceedings of the 21st International Conference on Ground Control in Mining, August 6-8, 2002, Morgantown, West Virginia. Peng SS, Mark C, Khair AW, Heasley KA, eds., Morgantown, WV: West Virginia University, 2002 Aug; :58-67
Link
NIOSHTIC No.
20024634
Abstract
Longwall mining is one of the most widely practiced underground coal mining method. The behavior of the longwall gob is very critical in the understanding of the complex ground response to longwall mining. In the limited data available, the values of gob moduli used in numerical modeling ranged from 1,000 psi to over 300,000 psi. Such a wide variation in moduli would greatly affect the results of the numerical analysis. A better understanding of the behavior of the gob will allow numerical models to be more accurate for simulating longwall mining conditions. In this study, a gob model based on the Terzaghi's model was incorporated into the comprehensive finite element package, ABAQUS, to simulate the loading behavior of longwall gob material. A case study was used to verify the proposed gob model.
Keywords
Coal-mining; Mining-industry; Occupational-hazards; Engineering-controls; Engineering; Models; Case-studies; Rock-bursts; Rock-falls; Rock-mechanics; Geology; Ground-control; Ground-stability
Publication Date
20020806
Document Type
Conference/Symposia Proceedings
Editors
Peng-SS; Mark-C; Khair-AW; Heasley-KA
Funding Amount
328500
Funding Type
Grant
Fiscal Year
2002
NTIS Accession No.
NTIS Price
ISBN No.
0939084569
Identifying No.
Grant-Number-R01-OH-004238
Source Name
Proceedings of the 21st International Conference on Ground Control in Mining, August 6-8, 2002, Morgantown, West Virginia
State
WV
Performing Organization
West Virginia University Research Corporation, Morgantown, West Virginia
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