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Laboratory And Field Characterization Of Immediate Floor Strata In Illinois Basin Coal Mines
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Citation (Style = APA)
Chugh, Yoginder P. (1989). Laboratory And Field Characterization Of Immediate Floor Strata In Illinois Basin Coal Mines. Rock Mechanics as a Guide for Efficient Utilization of Natural Resources
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Chugh, Yoginder P. (1989). Laboratory And Field Characterization Of Immediate Floor Strata In Illinois Basin Coal Mines. Rock Mechanics as a Guide for Efficient Utilization of Natural Resources
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Reference Manager (RIS)
SpreadSheed (CSV)
Organization: International Conference on Ground Control in Mining
Pages: 8
Publication Date:
Jan 1, 1989
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Abstract
Abstract
| The characteristics of weak floor strata associated with actively mined coal seams in Illinois are very important from ground stability point of view and, in many cases, are the governing factors in determining the size of pillars and mine openings. Laboratory and field getotechnical characterization studies of weak floor strata were conducted at six mines during the period 1985-1988. Correlation analysis among engineering index properties, and laboratory, and field determined strength-deformation properties were conducted to identify simple tests which can be used to estimate ultimate bearing capacity and deformation properties of immediate floor strata. It was concluded that the ultimate bearing capacity (UBC) and strength- deformation properties of the weak floor strata can be estimated from simple tests such as, natural moisture content, atterberg limits, and axial swelling strain. Indirect tensile strength was found to be a better estimator of UBC than unconfined compressive strength. |
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