The various surface damages generated during the operation of conveyor belts have many adverse effects on the safe operation of conveyor belts, and their hazards mainly include the following points:
(1) The thinning of the conveyor belt makes it difficult to overlap the surface damage of the conveyor belt, resulting in a thinner thickness. When the two ends are overlapped, the joint thickness is uneven, and during operation, the joint position is rough and there is strong scraping and collision with the support roller, which not only wears the support roller but also shortens the service life of the joint. Especially when the new belt is overlapped with the old belt, it is more prominent. For conveyor belts connected by vulcanization method, overlapping is more difficult due to different thicknesses.
(2) The strength of the conveyor belt is reduced, and the damage to the conveyor belt reaches a certain degree, especially after the cover layer is damaged and reaches the core layer, which directly affects the tensile strength of the conveyor belt and reduces its strength. When the steel wire rope core conveyor belt is damaged to the core layer, it may cause water ingress and corrosion of the steel wire rope core, resulting in the loss of the required strength.
During the operation of a conveyor belt with deteriorating strength, it is highly prone to belt breakage accidents when encountering sudden increases in load, such as starting with load and jamming.
(3) Shortening the lifespan of conveyor belts can cause damage to the conveyor belt. Firstly, the covering layer is worn thin or even the core layer is exposed, causing premature damage to the conveyor belt, reducing its service life and increasing the transportation cost of the mine. For conveyor belts with varying degrees of wear on both sides of the centerline, the change in local tensile strength further reduces the service life of the conveyor belt.
(4) When the degree of damage caused by the deviation of the conveyor belt along the centerline of the conveyor belt varies on both sides, the tension rate on both sides often changes, which directly leads to the deviation of the conveyor belt during operation. In order to correct the deviation, it exacerbates wear.