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Mining Publication: Coal Mine Subsidence Prediction Using a Boundary-Element Program
Keywords: Convergence Longwall panels Numerical modeling Subsidence
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 1999
Authors: KA Heasley, TM Barton
Conference Paper - March 1999
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20022704
Society for Mining, Metallurgy, and Exploration Annual Meeting, 1998 Mar :1-6
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.
Image of publication Coal Mine Subsidence Prediction Using a Boundary-Element ProgramConference Paper - March 1999
Download PDF Document (0.44 MB)
NIOSHTIC2 Number: 20022704
Society for Mining, Metallurgy, and Exploration Annual Meeting, 1998 Mar :1-6
See Also
Critical Review of Numerical Stress Analysis Tools for Deep Coal Longwall Panels Under Strong Strata
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Development of Multiple Regression Functions for Performance Prediction of Gob Gas Ventholes for Sealed and Active Longwall Mines
Development of Numerical Models to Investigate Permeability Changes and Gas Emission around Longwall Mining Panel
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
A First Step in Developing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
Modeling the Effects of Longwall Mining on the Ground Water System
Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Timing and Duration of Subsidence Due to Longwall Mining
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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