ABSTRACT
One of methods of decreasing costs of operation in existing belt conveyor systems is the increase of the relative conveyor load by shortening the time of conveyors operation. The interesting point in calculation of savings is possible increase in conveyor belt durability measured in calendar time of operation. Until now it was impossible to estimate this because conveyor load effect upon belt durability has not been determined yet. After the discussion of hitherto methods for estimating belt durability a theoretical model has been chosen which take into account both important for belt durability factors: relative conveyor load and conveyor length. Basing on data acquired in the „Rudna” mine a regression of number of belt cycles on these both factors has been determined for linear, exponential and reciprocal model. Positive verification of theoretical model (corresponding to the reciprocal model) enables now to use it for making predictions of belt durability after the increase of conveyor load
