Zpravodaj Hnědé uhlí 2012, 52(1)

First part of geophysical survey in the landslide area of the north-western slopes of the ČSA open pit mine

RNDr. Helena Valentová, Ph.D.¹, doc. RNDr. Jan Nedbal, CSc.¹, RNDr. Milan Neubert², RNDr. Jaroslav Jochman³

¹ UK v Praze, Matematicko-fyzikální fakulta, Katedra makromolekulární fyziky

² VVV VÝCHOD, spol. s r.o, Most

³ VVV MOST spol. s r.o., Most

The paper compares the measurements of hardness and dynamic mechanical properties of rubber cover layers performed on new belts and on belts exposed to different operating conditions over a long period. The results show that the interaction of rubber conveyor belts with the shipped material may play an important role in addition to the general aging. Changes in physical properties of rubber cover layers are then manifested mainly in the central part of the top cover layer which is in contact with transported material. The authors demonstrate that operation-induced changes in Young modulus and hardness of the top cover layer can heavily influence the mechanical behavior of the conveyor belt as a whole, and thus critically alter its operational characteristics. Finally, some recommendations to belt transport operators are presented, such as paying an increased attention to the specification of acquired conveyor belts and to their professional taking delivery.

Keywords: conveyor belts, rubber aging, dynamic mechanical properties, hardness

Published: March 1, 2012  Show citation