REVIEW OF OPERATIONS: SOUTH AFRICA REGION
OVERVIEW
Location: South Deep is situated in the
districts of Westonaria and Vanderbijlpark
(Gauteng Province), some 45 km southwest
of Johannesburg at latitude 26º 25’S and
longitude 27º 40’E. It is accessed via the
R28 provincial road between Westonaria
and Vereeniging, and is located in the major
gold mining region of South Africa, being the
Witwatersrand Basin. Infrastructure: South
Deep operates one gold plant and is accessed
from surface through two shaft systems, the
new Twin shaft complex of which the main
shaft comprises a single-drop to a depth of
2,995 metres, and the original mine’s South
shaft complex. The mine has been subdivided
into two main areas, namely “above current
infrastructure” to 110 level (2,888 metres below
surface), and below current infrastructure to 135
level (3,250 metres below surface). Geology:
Exploiting auriferous palaeoplacers (reefs), i.e.
the Ventersdorp Contact Reef (VCR) of the
Venterspost Formation and conglomerates
that comprise the Upper Elsburg Reefs of the
Mondeor Formation. Mine type and depth:
A large developing deep level gold mine (>2,000
metres below surface). Employees in service:
The mine has 2,273 permanent employees and
2,382 contractors.
SAFETY AND ENVIRONMENT
There has been a steady improvement in the
safety performance year on year. The standout
safety statistic was a fatality free year for F2009.
The serious injury frequency rate decreased
from 5.25 to 2.08, an improvement of 60 per
cent, the lost day injury frequency rate decreased
from 16.81 to 5.26, an improvement of 69 per
cent, and the injury free days for the year of 218
is a new record for the mine. South Deep is now
100 per cent on trackless mechanised mining
methods and this has significantly contributed
to the improved safety performance. The mine
has adopted a ‘one pass system’ for support,
which covers all development headings across
the mine. No Section 54s were issued to South
Deep by the Department of Mineral Resources
during the year. Various internal and external
audits were conducted during the year.
South Deep has received ISO14001:2004
(Environmental Management System)
accreditation, and became the first of Gold Fields’
operations to be fully compliant and accredited
with the requirements of the ICMI Cyanide Code.
In F2010, OHSAS18001 certification is planned.
PROJECT REVIEW
South Deep is a capital project and remains a
developing mine. Excellent progress has been
made on the infrastructure to support the F2010
target of producing 300,000 ounces of gold and
the F2014 target of achieving full production
of between 750,000 and 800,000 ounces of
gold. The ore body has been remodelled and
scheduled for the next 30-years, the fleet is in
place and South shaft has been refurbished.
Re-investment in the South shaft complex
during the year has seen rock winding facilities recommissioned, which is in line with the
strategy for F2010 with approximately 60,000
tons per month to be hoisted at the South
shaft complex. At the Twin shaft complex
the Ventilation shaft brattice wall was safely
installed during F2009 and the first of four
surface fans has been commissioned. The fans
will be utilised in the build-up to full production
when the mine design requires the additional
ventilation. Everything is on track for the
completion of the Ventilation shaft early in 2012
and the subsequent full commissioning of the
entire Twin shaft complex to its design capacity
of 330,000 tons of ore hoisted per month. This
is a critical path milestone required for the mine
to achieve full production, as planned by the
end of F2014.
The surface exploration drilling programme has
progressed in F2009 and the currently planned
12 boreholes will be completed by the end
of F2011. In addition, long incline boreholes
(LIB) have been drilled underground and
this has resulted in a better understanding of
the area below 95 level and has reduced the
development required on 110 level to access
and open up the ore body.
The mining rights conversion application was
submitted in December 2008 and the mine is
advancing the commitments as set out in the
Social and Labour Plan.
Mechanised de-stress mining commenced in
the three targeted project areas in the current
mining horizons during F2009. Innovative mine
design has resulted in the application of a
horizontal de-stress mining cut and the same
low profile mechanised equipment is applied for
the regular mining and the de-stress cut mining.
The horizontal method has the benefit of
enhancing the de-stress mining grade and will
facilitate access to the long hole stoping mining
layouts for the new ground below 95 level.
Construction of the new South Deep tailings
storage facility has commenced and is
scheduled for first tailings deposition in
February 2010. Construction is expected to be
completed by July 2010.
OPERATIONAL REVIEW
Gold produced decreased by 25 per cent from
7,220 kilograms in F2008 to 5,434 kilograms in
F2009. This was due to the cessation of VCR
mining in January 2007 because of a major
geological fault causing the depletion of ore
availability.
Tons milled decreased from 1.37 million tons in
F2008 to 1.24 million tons in F2009. This was
mainly due to lower surface tons milled and
the cessation of the VCR mining. Surface tons
decreased from 0.30 million tons to 0.20 million
tons due to the depletion of surface dump
material. The majority of the surface material
processed in F2009 was from surface clean-up.
Main development increased from 5,850 metres
to 7,152 metres in F2009. Development below
95 level gained momentum in January 2009,
after the interruptions caused by the shaft
accident in May 2008.
Revenue increased from R1,342 million in
F2008 to R1,398 million in F2009. The higher
gold price received was partially offset by the
lower production.
Operating costs decreased by six per cent
from R1,264 million in F2008 to R1,188 million
in F2009. This decrease was mainly due to
labour restructuring early in the year which was
necessary because of the depletion of ore at
the labour intensive VCR mining area.
Total cash cost increased from R169,889 per
kilogram (US$727/oz) in F2008 to R207,803
per kilogram (US$717/oz) in F2009 as a result
of the lower production.
Operating profit, before amortisation, increased
from R78 million in F2008 to R210 million in
F2009. Operating margin increased from six per
cent in F2008 to 15 per cent in F2009.
Capital expenditure increased from R785 million
in F2008 to R1,021 million in F2009. The
majority of this increase was due to expenditure
on development and infrastructure below
95 level.
Notional cash expenditure increased from
R283,712 per kilogram (US$1,214/oz) in F2008
to R406,423 per kilogram (US$1,403/oz) in
F2009, due to the significant capital investment
needed to bring this mine to full production.
F2010 Focus Areas
- Safe production management;
- Completion of all shaft infrastructure in
support of achieving full production by
December 2014;
- Development to ramp up to 17.4 km from
7.2 km waste and reef metres; and
- Creating mining flexibility at South shaft.
|
Lost Time Frequency Rates
per million man hours worked


|
|
South Deep Gold Mine
| |
|
|
|
|
2009 |
|
2008 |
|
2007* |
|
| |
Main development |
|
km |
|
7.2 |
|
5.9 |
|
2.9 |
|
| |
Main on-reef (development) |
|
km |
|
4.3 |
|
3.1 |
|
1.7 |
|
| |
|
|
g/t |
|
5.9 |
|
6.0 |
|
6.2 |
|
| |
Area mined** |
|
'000m |
|
0 |
|
42.0 |
|
48.0 |
|
| |
Tons milled |
Underground |
'000 |
|
1,038 |
|
1,066 |
|
776 |
|
| |
|
Surface |
'000 |
|
203 |
|
301 |
|
328 |
|
| |
|
Total |
'000 |
|
1,241 |
|
1,367 |
|
1,104 |
|
| |
Yield |
Underground |
g/t |
|
6.1 |
|
6.5 |
|
6.2 |
|
| |
|
Surface |
g/t |
|
1.3 |
|
0.8 |
|
0.9 |
|
| |
|
Combined |
g/t |
|
4.4 |
|
5.3 |
|
4.6 |
|
| |
Gold production |
Underground |
kg |
|
5,178 |
|
6,967 |
|
4,783 |
|
| |
|
Surface |
kg |
|
256 |
|
253 |
|
293 |
|
| |
|
Total |
kg |
|
5,434 |
|
7,220 |
|
5,076 |
|
| |
|
Total |
'000oz |
|
175 |
|
232 |
|
163 |
|
| |
Operating costs |
Underground |
R/ton |
|
1,134 |
|
1,170 |
|
896 |
|
| |
|
Surface |
R/ton |
|
53 |
|
54 |
|
75 |
|
| |
|
Total |
R/ton |
|
957 |
|
924 |
|
652 |
|
| |
Gold sold |
|
kg |
|
5,434 |
|
7,220 |
|
5,166 |
|
| |
Total cash cost |
|
US$/oz |
|
717 |
|
727 |
|
595 |
|
| |
|
|
R/kg |
|
207,803 |
|
169,889 |
|
137,689 |
|
| Notional cash expenditure |
US$/oz |
|
1,403 |
|
1,214 |
|
854 |
|
| |
|
|
R/kg |
|
406,423 |
|
283,712 |
|
197,636 |
|
| |
Net loss |
|
Rm |
|
(10.9) |
|
(143.1) |
|
(46.8) |
|
| |
Capital expenditure |
|
Rm |
|
1,020.5 |
|
784.7 |
|
283.4 |
|
*South Deep for seven months from 1 December 2006
**VCR conventional mining was stopped in F2008 |
|