Abstract: With the continuous increase in global energy demand, coalbed methane, as an important unconventional natural gas resource, has received increasing attention for its development and utilization. However, the frequent explosion accidents during its extraction process pose a serious threat to the sustainable development of the entire coal industry. To explore the fire-blocking performance and pressure attenuation effects of porous materials on explosions involving coalbed methane containing heavy hydrocarbons, experiments on methane/ethane mixed gas explosions with a volume fraction of 9.0% are conducted using a custom-built gas explosion dynamics platform. The study compares the dynamic changes of methane/ethane mixed gas explosion flames and the pressure attenuation patterns under conditions involving empty tubes and porous materials. The results show that changes in the thickness or porosity of porous materials significantly affect the explosion flame wave and pressure wave. Porous materials with small porosities and low thickness fail to quench the flame, acting as turbulence elements that accelerate the propagation of the flame wave, intensifying the explosion and increasing the maximum flame speed by 78.41%. Increasing the porosity or thickness of the porous materials successfully blocks the flame wave, allowing it to propagate only upstream; an increase in the solid-phase structure proportion of the porous materials leads to attenuation of the pressure wave, with a maximum attenuation of 25.38%. The 1 cm-60 PPI combination is most effective in suppressing explosions, hence, in practical engineering, it is necessary to comprehensively consider the dual effects of the porosity and thickness of porous materials on blocking explosions, in order to reduce the phenomenon of intensified coalbed methane containing heavy hydrocarbons explosions caused by improper selection of porous materials leading to quenching failures.