Open AccessSilicified coal characteristic and distribution at pt mitrabara adiperdana Tbk, north Kalimantan for efficient mine planning
Author(s) -
Tri Winarno,
Nurakhmi Qadaryati,
Rehnalemken Ginting
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1524/1/012092
Subject(s) - coal , outcrop , geology , overburden , mining engineering , coal mining , problems in coal mining , drill cuttings , mineralogy , geochemistry , drilling , archaeology , engineering , geography , drilling fluid , mechanical engineering
Silicified coal is formed by the enrichment of mineral in the coal seam. Due to the very hard form, silicified coal interferes with the effectiveness of mining causing more time for excavation. The purpose of this study was to determine the characteristics and distribution of silicified coal in PT. Mitrabara Adiperdana Tbk, which is used as a reference for selective mining. This research has conducted mapping which includes surface and subsurface data collection and laboratory tests. Surface data includes geological structure, stratigraphy, distribution patterns and observations of megascopic characteristics of silicified coal inseam 3. Subsurface data include drill point and coal seam cross-sections in Sector Y. Laboratory analysis is carried out from the outcrop coal sample and overburden of seam 3. Silicified coal inseam 3 has two types, which are type A, which is more fragile, and type B which is harder. In general, silicified coal in the research area was formed on the coal layer that has direct contact with the tuffaceous sandstones. In fault areas, silicified coals are found along the fracture zone where coal seams come in contact with tuffaceous sandstones. Thus, the recommended mining area is based on the silicified coal distribution map.