ICGCM Papers:
Numerical Modeling Developments and Applications III
 
 
Influence of Roof/Floor Interface on Coal Pillar Performance
32nd International Conference on Ground Control in Mining
Influence of Roof/Floor Interface on Coal Pillar Performance
by
Kyle A PerryKot F UnrugKevin W HarrisMichael J Raffaldi, University of Kentucky, Lexington, United States
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Author's Presentation PPT
[Conference] 32nd International Conference on Ground Control in Mining
[Price] Free  [Comments] 0
[Topical Area] Numerical Modeling Developments and Applications III
[Author] Kyle A PerryKot F UnrugKevin W HarrisMichael J Raffaldi, University of Kentucky, Lexington, United States
[Abstract] 
Key Conclusions:
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We anticipate confirming the ARMPS database of case histories by utilizing material properties and loading conditions common for the underground coal mines. Through the expansion of possible roof and floor conditions and geology in underground coal mines, guidelines will be established as to how to proceed with ARMPS when geology does not fall within typical geologic settings and may explain apparent mischaracterizations in the database of ARMPS case histories.
Key Findings:
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It is anticipated that the standard loading behaviors and resultant success prediction as determined by ARMPS may be validated for fairly typical loading conditions and geologic settings. However, by altering material properties of both roof and floor to represent atypical geologic environments, e.g. massive sandstones or extremely weak floor, we anticipate finding stability discrepancies and loading environments that may be misrepresented by an ARMPS evaluation. Through sensitivity analyses with differentiating geologic environments, guidelines may be developed on how to proceed with these geologic variations.
Objective of the Paper:
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Numerical modeling will be utilized to study numerous hypothetical pillar loading conditions with differentiations in roof and floor qualities. The stresses influencing and resultant behaviors of pillars, roof, and floor rock will be examined to quantify amendments to the generally accepted mechanisms as utilized in the ARMPS software, with the objective of attaining a higher characterization rate of case histories.
Problem Statement:
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The geotechnical properties of roof and floor material can greatly influence the stress and resultant behavior of coal pillars. Numerous case studies have been mischaracterized by the ARMPS software while considering abutment pressures alone. It is hypothesized that these mischaracterizations could potentially be explained through a geotechnical examination of roof and floor properties.