DOI: https://doi.org/10.14710/jpii.2026.32346

Evaluasi Dampak Kehadiran Silicified coal Seam A011 dan B012 Terhadap Parameter Kualitas Batu Bara: Studi Kasus Pengendalian Mutu Produksi di Tambang 1 PT Gorby Putra Utama, Musi Rawas Utara, Sumatera Selatan

*Fandi Frananda  -  Program Studi Program Profesi Insinyur Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Hadiyanto Hadiyanto  -  Program Studi Program Profesi Insinyur Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275, Indonesia
Received: 30 May 2026; Revised: 29 Jun 2026; Accepted: 30 Jun 2026; Available online: 30 Jun 2026; Published: 13 Oct 2026.

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Abstract

Pengaruh kehadiran silicified coal terhadap kualitas batu bara serta efektivitas upaya pengendalian mutu di Tambang 1 PT Gorby Putra Utama, Musi Rawas Utara, Sumatera Selatan. Secara geologi, area penelitian termasuk ke dalam Formasi Muara Enim (Miosen Akhir–Pliosen Awal) dengan lingkungan pengendapan fluvial delta yang mengandung beberapa lapisan batu bara utama. Pengambilan sampel menggunakan metode chanel sampling yang diambil 2 titik dari seam A011 dan seam B012, memperlihatkan tingkat silifikasi yang berbeda akibat proses alterasi hidrotermal pasca deposisi. Lapisan A011 memiliki zona silicified coal setebal 10–15 cm termasuk pola patchy silicifition (spotting) dan lapisan B012 mencapai 40–50 cm yang berpola lenticular (melensa). Silifikasi menurunkan nilai kalori hingga 8–14% dan meningkatkan kadar abu lebih dari 2 kali lipat. Perbedaan ketebalan lapisan alterasi (silicified) berbanding lurus dengan tingkat degradasi mutu, sedangkan perubahan kadar sulfur cenderung lokal dan tidak seragam. Penggunaan excavator crusher memiliki efektivitas hingga 70–90% dalam menekan ketercampuran material yang tersilifikasi. Pengendalian mutu berbasis geologi berperan penting dalam menjaga konsistensi kualitas batu bara.

 

Kata kunci: Formasi Muara Enim, silicified coal, seam A011, seam B012, kualitas batu bara

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Section: Laporan Studi Kasus
Language : ID
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