BARA Coal Mine is located in the north-west Sumatra which belongs to NAGAN RAYA county,Aceh Special District,Indonesia.It is one of the five big sedimentary basins in Indonesia,called Westen Qiya basin with simple structure.It is rich in coal resources and the Coal-bearing strata being Cenozoic Neogene Pliocene Tutut group.The river controlled delta depositional system was developed in in shallow sea in coal-forming period.It is suitable for open pit mining because the engineering geology,hydrogeological conditions is very simple.In BARA Coal Mine,the main mining coal seam is the C1 and D1 seams,which are highquality lignite with low to medium ash content,low to medium sulfur content low harmful components content and high calorific value.