The main activities in coal mining at PT. Bukit Asam Tbk is an overburden stripping activity in the form of claystone with a strength of 34.5 Mpa. With a strength of 34.5 Mpa, PT Bukit Asam uses drilling and blasting methods to optimize the productivity of loading and digging equipment. There are several factors that become a benchmark for the success of an explosion among them, namely fragment…