Methodology and mathematical model of stand tests of roof bolts dynamic resistance
Pytlik A.

S u m m a r y
Methodology and mathematical model of stand tests of roof bolts dynamic resistance were presented in the paper. Results of the previous tests of roof bolts, loaded dynamically, carried out according to methodology described in the paper, proved that impact loads cause extreme stresses in roof bolts, which often led to their failure when loads were lower than destructive loads determined during statistical tests.