(1)Electrical, battery, or diesel-powered, self-propelled machinery including side discharge loaders, load haul dumpers, coal haulers and shuttle cars used belowground in coal mines shall be provided with substantially constructed roof canopies or cabs which shall give adequate protection against falling of ground from the roof or sides.(2)The cabin or seat of the operator provided in such machine shall be ergonomically designed and shall be such that the operator has clear line of sight in front as well as at rear of the machine without involving any constraint or strain.
