PANGGABEAN, B. D.; PUTRA, A. Y. U. ANALYSIS OF NATURAL UNDERGROUND TUNNEL BASED ON ROCK MASS RATING CLASSIFICATION IN TASANGKA AREA, JAYAPURA CITY. INTAN Jurnal Penelitian Tambang, [S. l.], v. 9, n. 2, p. 59–68, 2026. DOI: 10.56139/intan.v9i2.460. Disponível em: https://jurnal-intan.ac.id/index.php/intan/article/view/460. Acesso em: 7 nov. 2026.