Study on the influence of periodic roof fracturing on the mechanical disturbance characteristics of coal and gas outburst behavior in the mining face.

ABSTRACT: To elucidate the stress evolution characteristics of coal and the gas-dynamic response mechanism during periodic roof fracturing in longwall mining, the 3DEC numerical simulation software was employed to investigate the distribution characteristics of the abutment pressure at the instant of roof fracturing and elastic rebound. Based on the coupling relationship between abutment pressure and gas pressure, the gas occurrence characteristics in the mining face were further analyzed. The results indicate that, with increasing mining advance, the stress distribution after roof fracturing-affected by the roof suspension length and elastic rebound behavior-differs significantly from conventional patterns. As the mining face advances, the length of the overlying hard roof increases, and the elasti

SUBMITTER: Zhang C 

PROVIDER: S-EPMC12904452 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature