ANALYSIS OF MINIMUM EXPLOSIBLE CONCENTRATION OF COAL DUST EXPLOSION OF 63-53 MICROMETER SIZE USING 20 LITER EXPLOSION CHAMBER ON LABORATORY SCALE

• Main Author: Luhur Sadewa, Pekerti
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/86359
• Institution: Institut Teknologi Bandung

Coal dust is one of the elements that can cause explosions in underground coal mines. In addition to causing explosions, coal dust can also damage the health of mine workers. Components that cause explosions include oxygen, coal dust as fuel, heat sources, dispersion, and confinement. This study aims to analyse the minimum explosive coal dust concentration (MEC) so that it can be a reference to avoid coal dust explosions. Coal dust explosion testing with a dust particle size of 63-53 micrometres using the Siwek Chamber 20 L coal explosion test equipment, based on references from SNI 9240: 2023. This study was conducted using coal samples from Jambi Province with varying coal dust concentrations, namely 100 g/m3, 120 g/m3, 130 g/m3, 140 g/m3, 150 g/m3, 200 g/m3, 250 g/m3, and 500 g/m3. The results of this study show that, the maximum explosion pressure value and the rate of increase in maximum explosion pressure will increase along with the increase in coal dust concentration; the explosion class at all tested concentrations belongs to explosion class 1 (weak explosion), and the Minimum Explosible Concentration value obtained is 120 g/m3. Furthermore, based on the comparison of the current research with previous research related to the effect of particle uniformity and particle size on the Minimum Explosible Concentration value, it is found that the smaller the particle size range (uniform) and the finer the size of coal dust, the lower the Minimum Explosible Concentration value.