TITLE:
Risk Analysis of Coal and Gas Outburst of Single Coal Seam in China: A Case Study
AUTHORS:
Weichao Xue
KEYWORDS:
Coal and Gas Outburst, Single Coal Seam, Outburst Risk, Gas Pressure, Gas Content, Xi’An Coalmine, Jilin Province
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.14 No.7,
July
22,
2026
ABSTRACT: Determination of coal and gas outburst proneness in a coal seam is an important fundamental task for coal mine safety production. Based on the engineering geological conditions of a single coal seam in the Beiliu Area of Xi’an Coal Mine, Jilin Province, the coal and gas outburst risk of the Danyi Coal Seam was comprehensively assessed by observing and testing indicators, such as coal damage type, initial velocity of gas diffusion (Δp), coal hardness coefficient (f), virgin relative gas pressure (P), and coal seam gas content (W). The results show that the coal damage type is Class II, the maximum initial velocity of gas diffusion is 9.2 mmHg, the minimum coal hardness coefficient is 0.60, the maximum relative gas pressure is 0.14 MPa, the maximum gas content is 2.92 m3/t, and the average gas content is 1.85 m3/t. None of the individual outburst risk indicators reached the critical values, and no gas dynamic phenomena such as blowout or drill pipe jamming occurred within the assessment zone. Accordingly, it was determined that the coal seam has no coal and gas outburst risk within the area at a burial depth of less than 806.2 m (elevation −496.2 m). The research results can provide a reference for outburst risk determination of single coal seams under similar geological conditions.