Abstract
Recent advances in the design of wireline logging equipment (initially designed for the petroleum industry) and improved computerized analyses of these logging measurements provide reliable information for coal evaluation and associated mining operations. Properly applied well log analysis concepts allow a continuous, in-situ evaluation of coal seams including thickness, moisture, and ash content. Formation strength parameters (elastic rock constants such as Bulk Modulus, Young's Modulus, Shear Modulus, and Poisson's Ratio) can be determined not only for the roof and floor rock of the coal seam, but for the entire over-burden as well. The present discussion presents some field experiences with these techniques.
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