Pengaruh Lingkungan Pengendapan terhadap Kualitas Batubara pada PIT "X" PT. Insani Baraperkasa, Kecamatan Loa Janan, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur = The Influence of Deposition Environment on Coal Quality in PIT "X" PT. Insani Baraperkasa, Loa Janan District, Kutai Kartanegara Regency, East Kalimantan Province

Pemodelan dan Perhitungan Estimasi Sumberdaya Batubara pada Formasi Muara Enim, Lapangan X, PT. Inti Putera Kanaan, Kecamatan Bayung Lencir, Kabupaten Musi Banyuasin, Sumatera Selatan = Modeling and Calculation of Coal Resource Estimates in Muara Enim Formation, Field X, PT. Inti Putera Kanaan, Bayung Lencir District, Musi Banyuasin Regency, South Sumatra

Analisis Kestabilan Lereng Desain Rencana Batas Penambangan Batubara PT. X, Kabupaten Kutai Barat, Provinsi Kalimantan Timur = Slope Stability Analysis of Coal Mining Boundary Plan Design of PT.X, West Kutai Regency, East Kalimantan Province

Karakteristik Batubara Berdasarkan Analisis Petrografi Organik dan Nilai Sulfur Site Gurimbang, PT Berau Coal, Kecamatan Sambaliung, Kabupaten Berau, Provinsi Kalimantan Timur = Coal Characteristics Based on Organic Petrographic Analysis and Sulfur Value at Gurimbang Site, PT Berau Coal, Sambaliung District, Berau Regency, East Kalimantan Province

Tingkat kepatuhan penggunaan alat pelindung diri masker n-series tipe 8211 dan gambaran fungsi paru pada pekerja tambang batubara PT.X di Kutai Kartanegara, Kalimantan Timur = Compliance of personal protective equipment ppe n series mask type 8211 and the description of lung function of the coal mining workers PT.X Kutai Kartanegara East Borneo