Determination Of Relative Error in Coal Resource Classification Based On Geostatistical Drill Hole Spacing Analysis: A Case Study of Coal Deposits at Batang Hari, Jambi

Generally, the determination of resource classification is only qualitative based on geometric factors and geological complexity that control it. However, as prospect area found to have a reasonably heterogeneous sediment characteristic, method needed can be used increase level confidence in determining Optimum Drill Hole Spacing. Therefore, this study uses application geostatistics with global estimation variance (GEV) relative error value each parameter, namely thickness geometry quality form Ash VM. This research was carried out Jangga Aur village, Bathin XXIV District, Batang Hari Regency, Jambi Province, Working Area PT Berkat Bara Persada Jobsite Inti Nusalima.The Spacing Analysis (DHSA) results will obtain optimum spacing values, 0-10% for measured resources, 10-20% indicated 20% Inferred resources on-seam reference. Based study, it seam reference Seam D, then distance drill hole coal area, which had an average 80 m, geostatic analysis could increased up 250 m 450 800 m.