Research status and evolutionary trends of buried gas pipeline leakage and gas dispersion based on knowledge graph

This paper explores the research status and evolutionary trends of buried gas pipeline leakage and gas dispersion through knowledge graph analysis. Bibliometric analysis was performed on Chinese and English literature samples using CiteSpace and VOSviewer. Specifically, temporal trends in publication volume, journal distribution, institutional contributions, and the evolution of research hotspots were analyzed. Findings indicated a steady global increase in publications regarding buried gas pipelines. Chinese journals primarily address risk assessment, factors influencing leakage and gas dispersion, and numerical simulation, whereas international journals focus on hydrogen energy safety, hydrogen blending, hydrogen concentration prediction, and soil-gas interaction mechanisms. Academic cooperation on buried gas pipelines at home and abroad is mainly led by universities. The research in China evolved through three stages-basic mechanisms, coupled modeling, and in-depth exploration-while international research progressed from framework establishment to the integration of hydrogen energy and intelligent technologies, ending in comprehensive fusion.