ICGCM Papers:
Pillar Design Workshop
 
 
Calibrating the LaModel Program for Deep Cover Pillar Retreat Coal Mining
Pillar Mechanics Workshop Proceedings 2010
Calibrating the LaModel Program for Deep Cover Pillar Retreat Coal Mining
by
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Keith Heasley, Professor Morgan M. Sears, Graduate Research Assistant Ihsan B. Tulu, Graduate Research Assistant Christian Calderon-Arteaga, Graduate Research Assistant Larry Jimison, Undergraduate Research Assistant Department of Mining Engineering West Virginia University Morgantown, WV
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[Book] Pillar Mechanics Workshop Proceedings 2010
[Topical Area] Pillar Design Workshop
[Author] 
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Keith Heasley, Professor Morgan M. Sears, Graduate Research Assistant Ihsan B. Tulu, Graduate Research Assistant Christian Calderon-Arteaga, Graduate Research Assistant Larry Jimison, Undergraduate Research Assistant Department of Mining Engineering West Virginia University Morgantown, WV
[Abstract] 
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This paper reports on the results of the research work performed to develop and verify a standardized method of calibrating LaModel for deep-cover, pillar retreat. Initially, an in-depth evaluation of the critical input parameters for LaModel (the lamination thickness, the gob modulus and the coal strength) was performed. This evaluation identified a number of new parameter calibration procedures for making the program more accurate and effective. As these new input procedures were developed, they were implemented into various new “Wizards” in the LaModel program. Then to verify the “standardized” method for calibrating LaModel, 47 deep cover pillar retreat case histories from 11 different mines were analyzed with the new calibration procedures. As a result of this process, it was ultimately determined that if the LaModel user designs a deep cover pillar retreat section with the calibration method presented in this paper and keeps the safety factor above 1.40, then they should have a 90% chance of success (based on the given database analysis). This recommended calibration method and associated recommended safety factor represents a major milestone in the development of LaModel, since this is the first time that such recommendations have been made for use with the program.