Implementation the sublevel stopping method to increase productivity in the exploitation the anthracite coal deposits in Callejón de Huaylas – 2018. AS [Internet]. 2023 Dec. 20 [cited 2026 Jun. 10];16(2):Pág. 102-114. Available from: https://revistas.unasam.edu.pe/index.php/Aporte_Santiaguino/article/view/1024