Study of the Success of Explosion on Overburden (OB) Displacement Activities in Efforts to Achieve Production Targets at Pit 7 at PT. Alamjaya Bara Pratama East Kalimantan Province

The purpose of this research is, to determine the success of blasting in an effort to achieve the production target, to know the types of explosives, to know the use of abrasive materials used in blasting activities, to know the production achieved and the fragmentation produced in blasting activities. The blasting process at PT. ABP is said to be successful. The blasting target was not achieved due to the drill unit which experienced a lot of breakdowns, and weather factors that prevented the blasting target in April. PF 0.19 Kg/M3, ANFO used 220,350 Kg, Dinamit 2,353.50 Kg. The weight of the blast hole filling with an average depth of 6 and 8 meters with a column length of 3-4 meters, the amount of explosives used is 10-25 Kg/Meter, so the total is 30-100 kg/hole if the blast hole is in dry. With the number of production targets desired by the company in April is 1,880,220 Bcm and the actual blasting production field in April is 1,154,050 Bcm, the resulting fragmentation is 37-42 cm