Coal-seam faults refer to those where their planes are developed along thecoal seams and are at a low angle to ot nearly parallel to the planes of the coalseams. Their significant diagnostic criteria are fault plane, tectonoclastic coal andsharp variation in coal seam thickness. Coal-seam faults can either exist indepen-dently or co-exist with other geological structures; they can convert into eachother. Coal-seam faults ofter develop in such specific coal seams, as rather low inmechanic strength, present o...