Nestled in the heart of
Canada, the 777 Mine is the
flagship mine of Hudson Bay
Limited in Flin Flon, Manitoba,
owned by HudBay Minerals Inc.
The 777 Mine is set to achieve
full production by year’s end.
Since the feasibility study was
completed in April 1999, the
777 deposit has been constructed
to be a world-class
producer of copper and zinc.
HudBay Minerals Inc.
Hudson Bay Mining and
Smelting Co., Limited,
including its Flin Flon
December 21, 2004, for
$316 million plus
adjustments from Anglo
American plc. Following
the acquisition, the
management and operations
team did not change, and day to day running of the
777 Mine remains unchanged.
Located approximately 0.5 kilometres south of the
underground workings at Callinan Mine and adjacent to the
Flin Flon metallurgical plant facilities, at commencement
the ore body contained 14.53 million tonnes at 2.51 per
cent copper and 4.68 per cent zinc. The top of the ore body
is at approximately 900
metres below surface, dipping
at an average of 41
degrees. The mine has
been designed for production
to 1.35 million tonnes
without modifications to
the mine’s infrastructure.
The company is both ISO
14000 and OHSAS 18001
certified, and 777 is fully
compliant with regulatory
and company standards.
The development of the
777 ore body incorporated
a new concrete-lined 6.7
metre diameter shaft,
1,530 metres deep, and
lateral development. The
shaft incorporates two 16-
tonne skips, a man/material
cage and counterweight,
and a Maryanne
cage. There are two double
drum hoists, a 4100 kW
production hoist, and a
1300 kW cage/counterweight
men and material
hoist, and a single drum
820 kW Maryanne hoist.
included the crusher chamber,
ore and waste bins,
load-out facilities, main
underground shop, a dewatering
system, and access to the deposit on three horizons.
The 777 Mine surface facilities consist of the hoisthouse,
headframe/collar/bin complex, intake fans, exhaust
fan, office/dry building, electrical substation, pumphouse,
and warehouse. The hoisthouse, headframe/collar/bin
complex, electrical substation, pumphouse, and warehouse
were completed prior to the commencement of shaft sinking.
The fans were commissioned in conjunction with the
start of the lateral development and the office/dry building
was completed during the summer of 2003.
The 777 today
In the final year of ramping up to design capacity, the
777 Mine levels are now interconnected via an internal
ramp system from the Callinan Mine. Eight mining areas
are now fully developed to allow production at a blended
grade for the Flin Flon concentrator. All areas have a network
of paste fill piping, allowing high speed filling of the
mined out stopes. The mining plan has been successful,
with a longhole open stope approach in a primary/secondary
method in wide ore widths and longitudinal retreat
methods in areas where the ore widths are relatively small.
“We have achieved a number of
milestones on this project,” said H.
Russell Rood, president, mining division,
HudBay Minerals Inc. “We have
had an extremely good safety record
from the start of the project to date.
The capital project was completed on
time and on budget, and there has
been a successful paste plant startup
and operation, as well as a successful
transition from Major Project to
Operations control. We’ve maintained
our scheduled ramp-up of tonnage,
and are set to proceed smoothly to