Materiały konferencyjne SEP 2018

XXVII SCHOOL OF UNDERGROUNDMINING 2018 , Cracow, Poland PRINCIPLES FOR TESTING OF APPLIED BOLTS Pull-out test of installed bolts :  Pull-out test have to carry out for 3 % of installed bolts (in the distance up to 15 m from roadway face)  8O kN in pull-out is a limit for good installed bolt  If the pull-out test not succesfull the pull out test have to repeated in two souroundigs bolts  Bolts for monorail carrier have to tested everyone