JUSTIFICATION OF OPTIONS FOR THE SYSTEM OF OPENING UP CONTOUR RESERVES IN OPEN-PIT AND UNDERGROUND DEVELOPMENT OF ORE DEPOSITS IN MOUNTAIN AREAS. MBU [Internet]. 2026 Mar. 16 [cited 2026 Aug. 8];1(104):35-9. Available from: https://journal.nsumt.uz/academy/index.php/MBU/article/view/73