State Administration of Work Safety

Particle-scale discrete-element analysis of soundless cracking agent-induced fracture evolution in coal under laboratory-informed radial loading

Soundless cracking demolition agents (SCDAs) provide a non-explosive method for coal fracturing, but the particle-scale evolution of force transmission and bond failure under laboratory-informed loading remains unclear. This study combines free-volume expansion, steel-tube confin...

Coal Combustion-Related Acoustics: A Three-Stage Framework for Temperature Diagnosis During Oxidation and Conversion

Coal combustion-related acoustics comprise self-generated responses during coal oxidation and conversion and may enable non-contact temperature-related diagnosis. This review classifies these signals into three families: (i) thermally induced acoustic emission (AE), (ii) fluid–th...

Quantification and Mechanism of the Interborehole Effect in Coal Seam Gas Drainage

Abstract Coal seam gas drainage is crucial for reducing carbon emissions and ensuring safe coal mine production. In engineering, multiborehole combined drainage is widely adopted. However, the interaction among boreholes leads to the complex superposition of their respective infl...

Pressure-ControlledDynamic Conversion of Replacement–DisplacementMechanisms During ECBM Recovery

Abstract Gas injection pressure is a key parameter controlling enhanced coalbed methane (ECBM) recovery, as it directly influences gas adsorption–desorption, diffusion-seepage, and the dominance of replacement-displacement mechanisms. In this study, carbon dioxide (CO2) and nitro...