US 12,448,889 B2
Raise caving method for mining deposits, and a mining infrastructure, monitoring system, machinery, control system and data medium therefor
Horst Wagner, Leoben (AT); Tobias Ladinig, Diex (AT); and Matthias Wimmer, Jukkasjärvi (SE)
Assigned to LUOSSAVAARA-KIIRUNAVAARA AB, Luleå (SE)
Appl. No. 17/999,198
Filed by LUOSSAVAARA-KIIRUNAVAARA AB, Luleå (SE)
PCT Filed May 20, 2021, PCT No. PCT/SE2021/050477
§ 371(c)(1), (2) Date Nov. 17, 2022,
PCT Pub. No. WO2021/236002, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 2050595-4 (SE), filed on May 20, 2020; and application No. 2150606-8 (SE), filed on May 12, 2021.
Prior Publication US 2023/0203946 A1, Jun. 29, 2023
Int. Cl. E21C 41/16 (2006.01); E21B 7/04 (2006.01); E21C 37/00 (2006.01); E21C 39/00 (2006.01); F42D 3/04 (2006.01)
CPC E21C 41/16 (2013.01) [E21B 7/04 (2013.01); E21C 37/00 (2013.01); E21C 39/00 (2013.01); F42D 3/04 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An integrated raise caving mining method for mining deposits in rock mass comprising:
developing at least one raise in the rock mass,
developing a drawbell in the rock mass, wherein at least a portion of the drawbell is excavated from the at least one raise,
initiating caving through undercutting, wherein at least a part of an undercut is created by gradually expanding the drawbell in upwards direction by excavation,
developing at least two drawpoints into the drawbell, wherein the drawpoints are arranged on different levels, and
progressively drawing fragmented rock from the at least one drawbell through the drawpoints.