Surface fires in coalfields like Jharia and Raniganj have been burning since the 1920s-1930s, covering large areas and blocking access to millions of tons of coal. These fires are often caused by spontaneous combustion of coal refuse piles, quarry dumps containing carbon material, or underground fires spreading to the surface. Prevention methods include proper storage and compaction of coal and refuse, sealing sites, and regular inspections. Fighting fires involves techniques like digging, trenching, direct water quenching, or blanketing with inert materials. Coal stack fires also result mainly from spontaneous heating and can be addressed through proper ventilation, layering and compaction during storage.