Oktavia P. Stability Analysis of Pit B Slope Using RMR (Rock Mass Rating) And GSI (Geological Strength Index) Methods At PT. Halo Tambang Berjaya, Kalianda District, South Lampung Regency. icsiger [Internet]. 2025 Dec. 9 [cited 2026 Jun. 27];1(1). Available from: https://conference.lppm.unila.ac.id/index.php/icsiger/article/view/36