Multi-dimensional analysis and prevention and control strategies for gas over-limit accidents of coal mines
Yuan Liang
Zhang Qinghua
Xu Tengfei
Wang Qixiang
Nie Baisheng
Zhang Junwen
Li Jiangong
Li Zhiheng
Abstract：This study analyzes patterns of gas over-limit accidents in Chinese coal mines from 2023 to 2024,considering factors such as mine type,accident location,timing,enterprise type,and accident categories.The analysis reveals that over-limit accidents are most prevalent in outburst mines and high-gas mines,representing 54%and 28%of incidents,respectively.The regions with the highest numbers of these accidents are Southwest China,North China,and Northwest China.Areas with severe gas hazards are more susceptible to over-limit events.From March to May and August to December,gas over-limit accidents occur most frequently,which is primarily influenced by the production organization of coal enterprises.Non-state-owned enterprises accoant for 67.90%of gas over-limit accidents.Poor mining and excavation management is the main cause of such accldents,and climate-driven"breathing"phenomena in mines contribute to such accident in Northwest China.To reduce the occurrence of gas over-limit accidents,greater emphasis must be placed on both technical improvements and management practices.This includes risk prediction and graded control,advanced large-scale gas control measures,stable operation of ventilation and extraction systems,high-reliability monitoring system,and precise prevention and control strategies,based on atmospheric pressure fluctuation monitoring.These integrated efforts are essential to ensure safe and efficient mine production.
Keywords：gas over-limitmine safetyaccident causation analysisrisk classification and controlatmospheric pressure response
Publication Date：2026-02-28
Online Publishing Date：2026-03-25(First online date of this platform, not the publication date of the document)
Pages：8( 1-8 )