The article presents an analysis of the influence of the natural ageing time on the strength parameters of steel cord conveyor belts. The investigated phenomena include the influence of temperatures both above and below 0 °C, as well as exposure to sun, rain and snow. The tests were performed on conveyor belts which have been operated in the Bełchatów lignite mine for 30 years, transporting ROM material. The tests included adhesion of the steel cords to the belt’s core rubber and the tensile strength of both the carry and the pulley covers. The obtained results allowed determining the number of years after which belts operated in mines lose their properties. The results also indicate how long a conveyor belt, after launching it into service, retains such strength parameters that enable its further usage after revulcanisation. This information is of significant importance for the splicing and regeneration processes.

本文分析了自然时效时间对钢丝绳输送带强度参数的影响。研究的现象包括温度在0°C以下和0°C以下的影响，以及暴露于阳光，雨水和雪中。测试是在Bełchatów褐煤矿中运行30年的传送带上进行的，用于传送ROM物料。测试包括钢帘线对皮带芯橡胶的粘附力以及提篮和滑轮套的抗拉强度。获得的结果可以确定在矿井中工作的皮带失去其性能的年限。结果还表明，传送带投入使用后，其强度参数保持了多长时间，从而使其在硫化后可以进一步使用。