Abstract: A belt plough assembly is used to deflect material on a conveyor belt. The belt plough assembly includes a support structure, and a blade operatively positioned by the support structure on the material carrying side of the conveyor belt and orientated to deflect or redirect outlying material on a conveyor belt back inside the alignment of the skirts. The support structure includes a housing having an upright slot within which the blade is slidably mounted. The blade rests on the belt under its own weight, but is freely movable relative to the support structure. This enables the blade to maintain contact with the belt and follow any undulations in the belt, and self-adjust for wear on the blade. A damper may be provided for damping movements of the blade.