PERHITUNGAN SUMBERDAYA LAPISAN BATUBARA SEAM A, SEAM B, SEAM C, SEAM D DAN SEAM E DI WILAYAH KONSESI PERTAMBANGAN DAERAH “X”,FORMASI WAHAU, KALIMANTAN TIMUR

Abstract

Nowadays, the consumption of coal has been increasing. Together with knowledge development, so the business competition in the mining, especially in coal would be also increase. This is caused the exploitation of coal field would be added again. But, before doing the exploitation process, we have to know the resources of coal in that area. The research area lie in the “X” area, Muara Wahau Regent Area, East of Kalimantan. Based on geology, this area lie in the north side of Kutai basin that consist of Tertiary sediment with Eosen until Mio Pliosen age. The research area, especially, lie in the Wahau Formation. This formation consists of interbedded of claystone, , quartz sandstone, clayey sandstone, and coal intercalations limestone at the bottom of formation. The age of this formation is between Late Oligocene until Early Miocene. The purpose of this final project research are to decide the coal layer of seam A, seam B, seam C, seam D and seam E based on each physic characteristic, to know the geology structure and coal sedimentation form in the research area, to know the direction of thickening and thinning of coal layer for each seam and to know the volume of coal resources of seam A, seam B, seam C, seam D and seam E that found in the research area. The research method of this final project research is secondary survey method and the analysis method are qualitative and quantitative methods. Qualitative method are consists of seam appointment analysis, making structure correlation section profile, making isopach map, making coal distribution map and calculating of seam thickness. Even though, quantitative method are consists of wide calculating step with grid method and volume calculating step with kerucut terpancung method or kerucut method and silinder method. Based on seam appointment analysis got to know that seam A, seam B, seam C, seam D and seam E can be decided based on equal of each seam physic characteristic which are coal layer thickness factor, roof and floor layer characteristic, log curve form characteristic, and parting characteristic which found in the coal layer. Based on structure correlation section profile got to know that geology structure that found in the research area is fold which are anticline and sincline and the coal sedimentation form is fold. Based on isopach map got to know the direction of thickening and thinning of coal layer and volume of coal resources for each seam. The seam thickness for coal resources calculating is clean coal thickness and start from coal which has thickness  1m. Based on calculating result of isopach map got to know the volume of coal resources of seam A is 51.195.201 m3, seam B is 226.101,18 m3, seam C is 361.123,05 m3, seam D is 360.748,25 m3 dan seam E is 817.466,05 m3. So, total volume of coal resources in the examination area is 3.316.633.7 ton .