REVIEW OF OPERATIONS: SOUTH AFRICA REGION
OVERVIEW
Location: Driefontein is situated some 70 km
west of Johannesburg, at latitude 26°24’S
and longitude 27°30’E, near Carletonville in
the Gauteng Province of South Africa. The
site is accessed via the N12 highway between
Johannesburg and Potchefstroom. Geologically
the mine is located on the North Western Rim
of the Witwatersrand Basin. Infrastructure: It
comprises eight producing shaft systems that
mine different contributions from pillars and
open ground, and three gold plants of which
1 plant processes mainly underground ore,
2 plant processes both underground ore and
surface material and 3 plant processes surface
material only. Geology: Three primary reefs
are exploited; the Ventersdorp Contact Reef
(VCR) located at the top of the Central Rand
Group; the Carbon Leader Reef (CL) near
the base and the Middelvlei Reef (MR), which
stratigraphically occurs some 50 metres to
75 metres above the CL. Mine type and depth:
It is a large, well-established deep to ultra deep
level gold mine to 50 level (the lowest working
level) some 3,400 metres below surface.
Employees in service: The mine has 15,501
permanent employees and 2,244 contractors.
SAFETY AND ENVIRONMENT
During the year under review, seven employees
lost their lives in four mining related accidents.
Of the seven deceased, six were fatally injured
in seismic induced falls of ground and one in
a tramming related accident. The fatal injury
frequency rate improved from 0.26 in F2008
to 0.16 in F2009. The mine continued with the
‘Masiphephe’ safety programme during the
year, and overall safety performance improved
on all indices year on year. On 12 June 2009,
the mine recorded in excess of 2.85 million
fatality free shifts, which is a record achievement
for the mine and set a new benchmark for deep
level gold mining. The lost day injury frequency
rate improved from 7.02 for F2008 to 4.90 in
F2009 with about a third of accidents caused
by falls of ground, which remain the major
cause of accidents.
During F2009, Driefontein received, and complied
with, various instructions to stop operations
(known as Section 54s) from the Principal
Inspector of the Gauteng area of the Department
of Mineral Resources (DMR). Following additional
inspections, including the Health and Safety
Audits that ensure legal compliance of the mine,
the DMR has expressed its satisfaction with the
mine’s remedial measures. Driefontein was also
exposed to the external audit by DuPont as well
as an internal audit on the full compliance safety
management system. Remedial action plans
which address the recommendations emanating
from these audits will provide the platform for
continuous health and safety improvements.
Driefontein maintained its OHSAS18001 and
ISO14001:2004 (Environmental Management
System) accreditation through the various
external audits conducted in F2009.
OPERATIONAL REVIEW
Gold production decreased by 11 per cent
from 28,865 kilograms in F2008 to 25,814
kilograms in F2009. This was due to two major
interventions, to improve safety performance
and address business interruptions. Firstly,
it was necessary to address the rapidly
deteriorating backlog in secondary support at
1, 4 and 5 shafts and secondly, a major pillar
and remnant pillar mining review led to the
suspension of stoping at 6 tertiary and 10 shaft
and the stopping of numerous high grade pillars
across the mine. These interventions had a
severe impact on gold production.
As a result underground tons milled decreased
from 3.27 million tons in F2008 to 3.14 million
tons in F2009. In order to fully utilise mill capacity
surface tons milled increased from 2.71 million
tons in F2008 to 3.08 million tons in F2009.
Main development decreased from 27,459
metres in F2008 to 20,074 metres in F2009
due to the redeployment of development crews
to address the historical backlog secondary
support.
Revenue increased from R5,502 million in
F2008 to R6,546 million in F2009. The higher
gold price received being partially offset by the
lower production.
Operating costs increased by 20 per cent from
R2,933 million in F2008 to R3,531 million in
F2009. This increase was mainly due to higher
electricity tariffs, labour costs and an increase
in raw material prices, especially in the first half
of F2009.
Total cash cost increased from R96,293 per
kilogram (US$412/oz) in F2008 to R129,837
per kilogram (US$448/oz) in F2009 as a result
of the higher costs and lower production.
Operating profit, before amortisation, increased
from R2,569 million in F2008 to R3,015 million
in F2009. Operating margin decreased slightly
from 47 per cent in F2008 to 46 per cent in
F2009.
Capital expenditure increased from
R1,016 million in F2008 to R1,034 million in
F2009. The majority of this increase was due to
housing upgrades and an increase in capitalised
ore reserve development.
Notional cash expenditure increased from
R136,806 per kilogram (US$585/oz) in F2008
to R176,838 per kilogram (US$610/oz) in
F2009.
F2010 Focus Areas
- Safe production management;
- Eliminating the backlog on secondary
support;
- Volume, value and quality;
- Increasing mining flexibility by accelerating
development;
- Advancing the optimisation study on
mining below 50 level;
- Reducing electricity consumption; and
- Advancing the commitments as set out
in the Driefontein Social and Labour
Plan.
|
Fatal Injury Frequency Rates
per million man hours worked


|
|
Driefontein Gold Mine
| |
|
|
|
|
2009 |
|
2008 |
|
2007 |
|
2006 |
|
| |
Main development |
|
km |
|
20.1 |
|
27.5 |
|
28.0 |
|
27.4 |
|
| |
Main on-reef (development) |
|
km |
|
4.1 |
|
5.8 |
|
5.3 |
|
4.2 |
|
| |
|
(value) |
cm g/t |
|
877 |
|
1,242 |
|
1,307 |
|
1,454 |
|
| |
Area mined |
|
'000m |
|
530 |
|
579 |
|
653 |
|
680 |
|
| |
Productivity |
|
m2 /TEC* |
|
2.6 |
|
2.8 |
|
3.2 |
|
3.4 |
|
| |
Tons milled |
Underground |
'000 |
|
3,137 |
|
3,273 |
|
3,812 |
|
3,867 |
|
| |
|
Surface |
'000 |
|
3,080 |
|
2,708 |
|
2,840 |
|
3,000 |
|
| |
|
Total |
'000 |
|
6,217 |
|
5,981 |
|
6,652 |
|
6,867 |
|
| |
Yield |
Underground |
g/t |
|
7.5 |
|
8.1 |
|
7.6 |
|
8.1 |
|
| |
|
Surface |
g/t |
|
0.7 |
|
0.8 |
|
1.0 |
|
1.4 |
|
| |
|
Combined |
g/t |
|
4.2 |
|
4.8 |
|
4.8 |
|
5.2 |
|
| |
Gold produced |
Underground |
kg |
|
23,658 |
|
26,591 |
|
28,815 |
|
31,441 |
|
| |
|
Surface |
kg |
|
2,156 |
|
2,274 |
|
2,803 |
|
4,314 |
|
| |
|
Total |
kg |
|
25,814 |
|
28,865 |
|
31,618 |
|
35,755 |
|
| |
|
Total |
'000oz |
|
830 |
|
928 |
|
1,017 |
|
1,150 |
|
| |
Operating costs |
Underground |
R/ton |
|
1,044 |
|
830 |
|
653 |
|
579 |
|
| |
|
Surface |
R/ton |
|
83 |
|
79 |
|
65 |
|
60 |
|
| |
|
Total |
R/ton |
|
568 |
|
490 |
|
402 |
|
352 |
|
| |
Gold sold |
|
kg |
|
25,814 |
|
28,865 |
|
31,618 |
|
35,755 |
|
| |
Total cash cost |
|
US$/oz |
|
448 |
|
412 |
|
348 |
|
315 |
|
| |
|
|
R/kg |
|
129,837 |
|
96,293 |
|
80,457 |
|
64,870 |
|
| |
Notional cash expenditure |
|
US$/oz |
|
610 |
|
585 |
|
476 |
|
403 |
|
| |
|
|
R/kg |
|
176,838 |
|
136,806 |
|
110,269 |
|
82,872 |
|
| |
Net earnings |
|
Rm |
|
1,421.3 |
|
1,233.3 |
|
1,004.3 |
|
645.0 |
|
| |
Capital expenditure |
|
Rm |
|
1,034.4 |
|
1,016.4 |
|
815.0 |
|
543.3 |
|
*TEC = Total Employees Costed |
|