are mined using a combination of longitudinal and transverse mining.
The 1995 ZCCM feasibility study proposed a backfill primary and secondary stope
mining method advancing upward to create a closure pillar below 4440 level (1,350 m).
It occurs in a wide "graphitic" shear zone in the 44-11-1 stope
The development of the next four stopes
is progressing well, and we are on track to achieve commercial production in the fourth quarter of 2017.
has a trough drive at the base, and a reef drive on the hanging wall, which is used to determine the reef contact position, control ventilation and assist with backfilling.
The reduced head- grade reflects the mix of the stopes
mined and is, to a large extent, a timing issue.
development for sublevel caving will produce waste rock in the amount of 25% of the ore extracted and there is no place to leave any of it underground when this mining method is employed.
Golden Star plans to begin longitudinal stoping of the B Shoot in the first quarter of 2017, with larger, transverse stopes
expected to be accessed in the third quarter of the year.
JDS) was retained to oversee the trial stope
mining, processing of ore through Continentals small-scale milling facility and verification of all reconciled results.
A prefeasibility study conducted in October 2003 pegged the capital cost of underground development and drilling at $3 million, and stope
development and equipment at $2.
Snowden continues to develop the underground stope
optimisation software, Stopesizor, which is now used routinely in-house for mine optimisation studies.
The purpose of this exercise will be to compile data pertinent to: dilution, deletion, stope
ore grade, mill recovery and mining productivity, again providing more reliable planning and budgeting metrics.