COAL QUALITY CONTROL FROM PIT TO STOCKPILE
L Pulungan, V Arbianto *
Faculty of Engineering, Bandung Islamic University
*) linda.lindahas[at]unisba.ac.id
Abstract
In general, coal quality parameters used are calories, moisture content, volatile matter, ash content, carbon content, sulfur content, size, etc. At the research location, there are 4 seams, including seam A1, seam A2, seam B and seam C. The next discussion is focused on mining activities seam C divided into 3 layers of coal stripping, namely layer 1, layer 2, and layer 3 with thickness each 2 meters each. In seam C identified 2 clay partings, with thickness 10 cm on layer 1 and 20 cm on layer 2. Based on the coal classification table for trade, the percentage change in the quality of coal from mining that shows a significant change is the ash content. The percentage change in ash content for each layer, 112.1%, 106% and 114%. The percentage change in ash content exceeds the range 37.5 - 60% (classified in the medium ash ). Efforts to mitigate changes in the quality of coal from mining are the implementation of selective mining by taking into account when mining the transition zone of the layer between the over burden layer and coal, separating the quality of different coal, and coal washing studies, to improve coal quality
Keywords: Coal Quality, seam, steam coal, ash content
Topic: Mining Engineering