One of the main activities in coal mining at PT Bukit Asam Tbk is overburden. The layer of cover material of claystone and sandstone with a strength of 1.32 - 5.75 Mpa. Blasting operations are carried out first to optimize the productivity of the loading digger. There are several factors that become a benchmark for the success of a blasting including the fragmentation of blasting results, the l…