The daily increase in hydrogen gas storage facilities reflects the growing demand and recognition of hydrogen as a promising fuel for the future, bringing numerous social, economic, and environmental advantages. Despite its potential benefits, the accidental explosions of hydrogen storage tanks have posed significant challenges, impacting the economy, infrastructure, and living conditions. This study used an 8 kg trinitrotoluene (TNT) explosion test between reinforced concrete walls for a 25 kg hydrogen gas explosion through the TNT equivalent weight method. The dimensions of the reinforced concrete wall were 2 m in height, 5 m in length, and 0.2 m and 0.25 m in width. In addition, the experimental pressure was compared with the TNT explosion simulation results. LS-DYNA, a commercial software, was used to study the TNT explosion near a reinforced concrete protection wall through simulation. The experimental and simulation pressure curves had a good agreement. For further simulation analysis, the TNT equivalent weight method was studied for hydrogen gas, and the behavior of the protection wall under explosion was analyzed. From experimental and simulation results, it was confirmed that pressure decreases when the upward flow of blast load increases at the time of near-field denotation. Numerical simulation concludes that increasing the thickness of the protection wall decreases the displacement on the protection wall.