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Spacer ImageOpen File Report 07-01: Tectonic history and characteristics of fracture systems affecting coal mine roof stability in Southwest Virginia
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by C.B. Byington, 35 pages, 48 figures, 4 tables, 2007. This work presents an integrated model for recognizing macroscopic and microscopic coal-mine fracture discontinuities related to coal-mine roof falls in Southwest Virginia. In addition, the regional deformation history consisting of two distinct deformation events and their associated faults, folds and fractures is defined within the context of coal-mine roof falls. The results of Stress-field Orientation Mapping and Analysis calculations in the coal mines, which defines the mean, operative, stress field in Southwest Virginia are also included.
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