90% of longitudinal tears are caused by foreign bodies at the loading stations. Only 5% of the damage arises at the end of the belt route and 5% between both ends of the belt route.
To monitor steel cable and plastic belts, inductive loops have been embedded in the belt.
They are individually embedded in raw rubber plates and can thus be directly inserted during belt manufacturing.
For subsequent installation into the belt (for example, during repairs), they can be manufactured in vulcanised plates via cold or hot vulcanisation.
The loops are used to protect the belt at a loading station.
At aboveground loading stations, the distance between the loops is generally between 100 and 200 metres, while a distance of 50 to 80 metres should be observed underground.
In case of highly loaded belts, the distance can be reduced to 10 to 50 metres.