Abstract
China is rich in coal resources, especially in Northwest China. However, due to the complex geological conditions, some low permeability and high gas seams often accompany abnormal gas emission during mining, which poses a serious threat to the safety of coal mine. This paper takes East 102 working face of Weijiadi Coal Mine in Jingyuan mining area of Gansu Province as the research object. Aiming at the abnormal gas emission phenomenon during the initial discharge period of working face, the causes of abnormal gas emission are analyzed. The prevention of abnormal gas emission should be carried out from five aspects: strengthening ventilation management, perfecting gas extraction system, perfecting safety monitoring and control system, strengthening power supply management and emergency management on site.
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