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Abstract


ABSTRAK

Daerah penelitian adalah Blok timur Wilayah Izin Usaha Pertambangan PT.Sarolangun Prima Coal dengan luas 1024 Ha. Metode yang digunakan untuk mengestimasi sumberdaya batubara di daerah penelitian adalah metode Cross Section dengan pedoman perubahan bertahap (Rule of Gradual Change) dan dengan pedoman titik terdekat (Rule of Nearest Point). Prinsip dari  metode Cross Section Rule of  Gradual  Change, yaitu  dengan  menghubungkan  titik pengamatan terluar, endapan batubara dianggap sama sepanjang garis lurus tehadap penghubung 2 (dua) titik. Sedangkan pada metode Cross Section Rule of Nearest Point, yaitu berpedoman pada titik terdekat, dengan membuat batas terluar endapan secara linear, panjang garis linear sama dengan batas blok, setengah jarak antara dua titik.

Berdasarkan penaksiran sumberdaya batubara dengan menggunakan metode Cross Section dengan pedoman perubahan bertahap (rule of gradual change) dengan jarak antar sayatan 100 meter dan diperoleh sumberdaya batubara terukur (Measured Coal Resource) seam A dan  seam B adalah sebesar  28.304.358,40  Ton.  Volume overburden  dan  interburden  yang  didapatkan adalah sebesar 182.835.816 Bcm dengan  Stripping Ratio(SR) 6 : 1. Metode Cross Section dengan pedoman titik terdekat (rule of nearest point) dengan jarak antar sayatan sebesar L1 50 meter dan L2 50 meter diperoleh sumberdaya batubara terukur (MeasuredCoal Resource) seam A dan seam B adalah sebesar 29.232.773,1 Ton, serta volume overburdendan interburden yang didapatkan adalah sebesar 189.104.302,6 Bcm. dengan Stripping Ratio(SR) 6 : 1.

ABSTRACT

The  research  area  is  at  the  Region  east  block  of  Licensed  Mining  Company  of  PT. Sarolangun  Prima Coal with area of 1024 Ha. The method being used to estimate the coal resource at the research area is Cross Section method with Rule of Gradual Change and with Rule of Nearest Point. The principle of   Cross Section Rule of Gradual Change method is by relating the outermost observation points, the coal deposits considered to be the same throughout straight line connecting the two points. Whereas, at the Cross  Section Rule of Nearest Point method, which is based on the nearest line, it is by making the outer boundary deposit linearly, where the length of the linear line is the same as the block boundary, it is a half distance between two points.

Based on the coal estimation using Cross Section Rule of Gradual Change method with the distance between slices is 100 metres, the Measured Coal Resource of seam A and seam B is as big as 28.304.358,40 Tons. The acquisited overburden and the interburden volumes are as big as 182.835.816 Bcm with 6:1 Stripping Ratio (SR). Cross Section Rule of Nearest Point method where the distance between slices of L1 is 50 meters and L2 is 50 meters, a Measured Coal Resource of seam A and seam B can be acquisited as big as 29.232.773,1 Tons. The obtained overburden and interburden volumes are as big as 189.104.302,6 Bcm with 6:1 Stripping Ratio (SR)

Kata kunci: Sumberdaya Batubara, Metode Cross section, Stripping Ratio