Since deposition, coal-bearing strata are subjected to a stress field. The magnitude and direction of the field varies through geologic time as evident by highly deformed strata in some deposits. Various factors control the current state of the stress field, and CBM and coal mining operations are directly influenced by its direction and magnitude. Some basins reflect relatively weak fields, whereas, others can have high stress magnitudes related to a particular tectonic setting. As mines get deeper, coping with stress-related problems becomes more important in assuring cost-effective coal extraction. The prevention of personnel injuries, equipment damage, and even loss of the full investment of the mine depends on the recognition and mitigation of stress (Collins, 1991).