A Model for the Evaluation of Systematic Variability in Composition and Thickness of High Sulfur-high Ash Coals.
Donaldson AC; Renton JJ
For Reference Only At Bureau Libraries :108 pages
The purpose of this project was to provide a coal model to geographically describe the composition and thickness of a coal seam in sufficient detail to ensure an efficient and effective mining utilization and reclamation plan for coal before it is mined. The study focuses on high sulfur and high ash coals of the Central and Northern Appalachians. Data from approximately 500 cored wells of mainly Pittsburgh coal but also Redstone, Sewickley, and Waynesburg coals were provided by industry and used in the analysis. An additional 652 samples were collected and chemically analyzed. The coals were selectively examined using Mossbauer spectrometer analyses of pyrite-pyrrhotite; acid production when oxidized; and petrography by radiographs and an image scanner, scanning electron microscope, and reflected light. The report includes a better method than is presently used to predict acid mine waters and a method to improve the prediction of lateral coal-quality changes within a seam from limited samples.
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