Methods and practices for identifying coal and gas outburst risks

CHEN Xuexi; JIA Yiyun

doi:10.19956/j.cnki.ncist.2026.01.001

Abstract：Coal and gas outbursts are among the most severe dynamic disasters in Chinese coal mining,where the instability and failure of the coal body are induced by the coupled effects of in-situ stress and gas pres-sure.Accurate assessment of outburst hazards is fundamental to ensuring safe mining operations.This paper provides a systematic overview of the historical development of outburst hazard assessment agencies in China,tracing the evolution of their certification and management systems,and profiling the primary qualified institu-tions operating today.It further analyzes the developmental trends in assessment standards and indicator frame-works,clarifying the scientific rationale behind the transition from early methods based on gas-dynamic phe-nomena to modern comprehensive judgments using measured indicators.This evolution signifies a logical pro-gression from focusing on mechanical properties to the material's fundamental basis—namely,gas content and pressure.Leveraging the practical experience of the North China Institute of Science and Technology as a case study,this paper details a complete workflow for outburst hazard assessment,including methodologies for geo-logical unit delineation,optimal placement of measurement points,and advanced techniques for determining key parameters such as gas pressure,gas content,coal firmness coefficient,and initial gas desorption velocity.The accuracy and representativeness of these measurement results are validated through a reliability analysis of field data from regions including Xinjiang,Shanxi,and Henan.The study concludes that China's approach to out-burst hazard assessment is advancing towards greater procedural standardization,more scientific indicator sys-tems,and systematic data verification,thereby providing a robust technical foundation for the prevention and control of gas-related disasters in coal mines.