Abstract: Water inrush disaster caused by Qixia limestone karst water in Longyong coalfield becomes a direct threat to the region as a major factor in coal mine safety production. Regarding the water inrush accident of the south of Baisha Mining Area as an example, on the basis of the introduction of the geological situation in the area, the article expounds three times water inrush conditions and hazards, and analyzes and researched water source, water quantity, water quality characteristics, water inrush channel and other factors of the "10.20" water inrush accident. The results show that the water inrush source is mainly from Qixia limestone fissure-karst confined water, and water inrush channel is mainly F₀ tectonic fracture zone and F₅ or F_t tectonic fracture zone.