ABSTRAKBatubara yang cocok untuk kegiatan gasifikasi bawah permukaan harus memenuhi persyaratan, antara lain kondisi geologis, ketebalan, kedalaman, kadar air total dan kadar abu. Berdasarkan persyaratan ini, tidak semua batubara dalam bisa dimanfaatkan untuk kegiatan gasifikasi bawah permukaan. Kegiatan eksplorasi batubara perlu dilakukan untuk meminimalisasi risiko geologis dan untuk mengetahui kondisi batubaranya. Berdasarkan hasil permodelan, ditemukan lapisan batubara D dengan kriteria kedalaman 200-300 m, ketebalan >5 m, kadar total air lembab+kadar abu <60%, nilai kalor 4.912-6.275 kkal/kg, reflektansi vitrinit 0,23-0,44 (lignit-subbituminus). Perhitungan sumber daya batubara dengan menggunakan software yang ada dan mengacu pada aturan SNI 5015-2011, menghasilkan sumberdaya tereka 3.316.578 ton, tertunjuk 1.909.560 ton dan terukur 2.479.951 ton.Kata kunci: batubara macang sakti, kualitas, gasifikasi batubara bawah permukaan, perhitungan sumberdaya. 4,912-6,275 kcal/kg, a vitrinite reflectance of 0.23-0.44 (lignite-sub bituminous). Calculation of the coal resource is conducted by using software and applying SNI 5015-2011, resulting in inferred resource of 3,316,578 tons, indicated resource of 1,909,560 tons and measured resource of 2,479,951 tons ABSTRACT
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