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Coal Mine Subsidence Prediction Using a Boundary-Element Program.

Authors
Heasley-KA; Barton-TM
Source
Society for Mining, Metallurgy, and Exploration Annual Meeting, 1998 Mar :1-6
Link
NIOSHTIC No.
20022704
Abstract
This paper presents several case studies in which a mechanics-based boundary-element program is used to back-calculate the surface subsidence associated with various panels at several northern Appalachian coal miners. The program used in this case study is called LAMODEL, which incorporates a frictionless, laminated overburden into a general-purpose displacement-discontinuity code primarily designed for calculating the stresses and displacements in coal mines or other thin-seam or vein-type deposits. In this paper, the program is used to calculate both the underground convergence and the resulting surface subsidence at five longwall panels and a room-and-pillar section. The fitted subsidence from the model is compared with the field measurements and analyzed. The results from this work show that the LAMODEL program is not as accurate as available empirical subsidence-predictive methods; the expected correlation between the geology and the optimum input parameters is not evident. However, for a mechanics-based program, LAMODEL does provide moderately accurate subsidence calculations, and it is one of a few programs that can even attempt to practically calculate both underground stress and convergence and the resulting surface subsidence.
Keywords
Case-studies; Mining-industry; Underground-mining; Coal-mining; Mine-workers; Underground-miners; Coal-miners; Mathematical-models
Contact
NIOSH, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Publication Date
19980301
Document Type
Conference/Symposia Proceedings
Fiscal Year
1998
NTIS Accession No.
NTIS Price
NIOSH Division
PRL
Priority Area
Other Occupational Concerns
Source Name
Society for Mining, Metallurgy, and Exploration, Inc.
State
PA
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