Coal Mining Energy Utilization and Environmental Impact Management Strategy Using the LCA Method

Abstract

Coal mining processing and the clearing of land require that materials which have been removed be carefully inspected before it is reused. In this study, the boundary of our model starts with excavation and ends with material recovery. Therefore, further processing of the material to be recovered (recycling, reprocessing) is excluded from the model. In this study, the topsoil layer was collected in three pits numbered one, two, and three, from January to December 2020. The use of the LCA method gives results after the inventory data is carried out, which results in global warming. The results showed material removal unit process generated a total CO2 value of 32.44 kg CO2- eq.tonne-1 of coal, and the coal mining unit process generated a total CO2 value of 255.99 kg CO2- eq.tonne-1 of coal, for the impact of global warming. When compared to the material removal process, the results of the coal mining unit process show the highest global warming impact. Coal processing gives a yield of 25.61 kg CO2- eq.tonne-1 of coal. So that the resulting impact as a whole is 314 kg CO2- eq.tonne-1 of coal. The total emissions resulting from B30 fuel (314 kg CO2- eq.tonne-1 of coal) are smaller than B20 fuel (320 kg CO2- eq.tonne-1 of coal), 6 kg CO2-eq.tonne-1 of coal. The coal mining process includes fuel used in coal extraction, coal hauling, coal stockpiling, blasting, water pumps, and water tracks.

Keywords

• coal mining, global warming, heavy equipment, life cycle assessment