QIAN, Sifa. Study on Optimization of Face Length of Fully Mechanized Caving Face in Extra-thick Coal Seams. International Core Journal of Engineering, [S. l.], v. 11, n. 6, p. 132–137, 2025. DOI: 10.6919/ICJE.202506_11(6).0015. Disponível em: http://icj-e.org/index.php/ojs/article/view/15. Acesso em: 18 apr. 2026.