Heri Prabowo, Tri Gamela Saldy, Syari Rahma Yanti, Rangga Agung Pribadi Heriawan
In coal stockpiles, Spontaneous Combustion symptoms often occur. This research aims to determine the effect of stacking time on coal temperature, determine the effect of rainfall on coal temperature, and determine the effect of self-burning on coal quality. This research uses an experimental approach and laboratory analysis to study the effect of Spontaneous Combustion on changes in coal quality. Data was collected for 14 days by monitoring coal temperature. The results of this research show that the length of time the pile lasts greatly influences the increase in temperature. This research also shows that if there is high rainfall, the temperature in the coal pile decreases and the occurrence of self-burning greatly affects the quality of the coal. From the results of measuring the temperature of the stockpile coal pile, it can be concluded that the length of time in which the stockpile lasts is very influential on the rise in temperature. The longer the stockpile takes, the more the temperature will rise. The test sample has a regression coefficient value of (R2) = 0.9301. The occurrence of spontaneous combustion greatly affects the quality of coal, where the ash content increases by 2.11% and calories decrease due to the increase in ash content. The increase in volatile matter content by 13.76% causes coal to produce heat, accumulate and eventually burn itself due to the presence of flammable gases. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
Department of Mining Engineering, Universitas Negeri Padang, Padang, Indonesia
