The strength of the joint of the conveyor belt is relatively low. If the bonding method is not precise, the strength of the conveyor belt joint will become even lower; Assuming that the next layer of canvas is damaged during cutting or polishing of the conveyor belt, excessive polishing, inadequate overlap length, insufficient number of steps, poor rubber function of the joint or self sulfurization failure, excessive polishing of the steel wire rope, rusting of the steel wire rope, etc., the strength of the joint will be greatly reduced. When in use, it is relatively easy to see the phenomenon of the conveyor belt joint breaking or cracking.

When the sealing adhesive is not used for the conveyor belt or the direction of the joint is incorrect, the joint (surface adhesive part) of the conveyor belt will also show cracking phenomenon. To prevent cracking from the source, conveyor belt manufacturers enhance the quality control of coal conveyor belts, add cleaning equipment, stop removing impurities, and reduce magazines and multiple pieces of coal.

In recent years, with the improvement of coal quality, the phenomenon of impurities tearing the conveyor belt has greatly reduced, and crack inspection equipment has been added. In a short period of time, the inspection results are checked, an alarm is issued, and the machine is stopped. Due to the fact that belt tearing is composed of multiple elements and cannot completely prevent the cracking of the conveyor belt, the commonly used tear prevention equipment and inspection equipment are mainly tear inspection equipment, usually located at the feeding point, consisting of sensors and controllers. The sensors are installed under the conveyor belt or next to the chute, and the controllers are installed on the machine side or indoors. When debris tears the conveyor belt, the debris or materials penetrating the conveyor belt are kneaded.