(1)Electrical, battery, or diesel-powered, self-propelled machinery including side discharge loaders, load haul dumpers, coal haulers, shuttle cars etc., used below ground in coal mines shall be provided with substantially constructed roof canopies or cabs which will give adequate protection against falling of ground from the roof or sides.(2)The cabin or seat of the operator provided is 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.
