HAN, Junxiao. Research on the Retention of Small Coal Pillars in Goaf Excavation Along the Fully Mechanized Mining Face. International Journal of Natural Resources and Environmental Studies, [S. l.], v. 6, n. 3, p. 111–121, 2025. DOI: 10.62051/ijnres.v6n3.13. Disponível em: https://ojs.ijnres.org/index.php/IJNRES/article/view/5653. Acesso em: 10 aug. 2026.