Mine string bolts of a high dynamic resistance
Pytlik A.

S u m m a r y
Mine string bolts of a high dynamic resistance were presented in the paper. Special attention was paid to a new string bolt structure of the IR-4W type. This bolt is designed to be used in the areas of increased rock mass pressure and in the conditions of rock bursts and bumps. Set of the components of the IR-4W string bolt was approved to be used in the underground workings of mines by the State Mining Authority in Katowice.