Overview
Stage | Production |
Mine Type | Underground |
Commodities |
|
Mining Method |
|
Mine Life | 2041 |
The DMLZ has continued its ramp-up of production. As of December 31, 2021, the DMLZ underground mine had 174 open drawbells. |
Source:
p. 4
PT-FI is a limited liability company organized under the laws of the Republic of Indonesia. Freeport-McMoRan has a 48.76 percent share ownership in PT-FI and the remaining 51.24 percent share ownership is held by PT Indonesia Asahan Aluminium (an Indonesian state-owned enterprise).
Contractors
- Subscription is required.
Summary:
The DMLZ ore body lies below the DOZ underground mine at the 2,590-meter elevation and represents the downward continuation of mineralization in the Ertsberg East Skarn system and neighboring Ertsberg porphyry.
Summary:
The DMLZ ore body lies below the DOZ underground mine at the 2,590-meter elevation and represents the downward continuation of mineralization in the Ertsberg East Skarn system and neighboring Ertsberg porphyry.
The DMLZ has continued its ramp-up of production. Hydraulic fracturing operations have been effective in managing rock stresses and pre-conditioning the cave following mining-induced seismic activity experienced from time to time. Ongoing hydraulic fracturing operations combined with continued undercutting and drawbell openings in the two currently active production blocks are expected to expand the cave, supporting higher production rates that are expected to average approximately 68,000 metric tons of ore per day in 2022 and 69,000 metric tons of ore per day in 2023 from three production blocks. As of December 31, 2021, the DMLZ underground mine had 174 open drawbells.
The DMLZ fleet consists of over 390 pieces of mobile equipment, which includes 63 LHD units and 34 haul trucks used in production and development activities. Each production LHD unit typically carries approximately 11 metric tons of ore and transfers ore into the truck haulage system. The haul trucks have a capacity of 55 to 60 metric tons and load ore from chutes fed by the LHDs.
Source:
Summary:

- subscription is required.
Combined production numbers are reported under
Grasberg Complex
Operational Metrics:
Metrics | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
Daily milling rate
| ......  | ......  | ......  | 9,800 t | 3,200 t | 3,200 t |
^ Guidance / Forecast.
- Subscription is required.
Reserves at December 31, 2021:
Mineral Reserves Cut-off grade 0.71 % CuEq.
Mineral Resources Cut-off grade 0.58 % CuEq.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
Sulphide
|
91 Mt
|
Copper
|
0.89 %
|
1,527 M lbs
|
Proven
|
Sulphide
|
91 Mt
|
Gold
|
0.79 g/t
|
1,825 koz
|
Proven
|
Sulphide
|
91 Mt
|
Silver
|
4.21 g/t
|
7,922 koz
|
Probable
|
Sulphide
|
321 Mt
|
Copper
|
0.84 %
|
5,032 M lbs
|
Probable
|
Sulphide
|
321 Mt
|
Gold
|
0.71 g/t
|
5,794 koz
|
Probable
|
Sulphide
|
321 Mt
|
Silver
|
4.03 g/t
|
26,620 koz
|
Proven & Probable
|
Sulphide
|
412 Mt
|
Copper
|
0.85 %
|
6,559 M lbs
|
Proven & Probable
|
Sulphide
|
412 Mt
|
Gold
|
0.73 g/t
|
7,619 koz
|
Proven & Probable
|
Sulphide
|
412 Mt
|
Silver
|
4.07 g/t
|
34,542 koz
|
Measured & Indicated
|
Sulphide
|
546 Mt
|
Copper
|
0.67 %
|
8,075 M lbs
|
Measured & Indicated
|
Sulphide
|
546 Mt
|
Gold
|
0.57 g/t
|
10,091 koz
|
Measured & Indicated
|
Sulphide
|
546 Mt
|
Silver
|
3.44 g/t
|
60,389 koz
|
Inferred
|
Sulphide
|
74 Mt
|
Copper
|
0.66 %
|
1,088 M lbs
|
Inferred
|
Sulphide
|
74 Mt
|
Gold
|
0.42 g/t
|
999 koz
|
Inferred
|
Sulphide
|
74 Mt
|
Silver
|
3.05 g/t
|
7,291 koz
|
Total Resource
|
Sulphide
|
620 Mt
|
Copper
|
0.67 %
|
9,163 M lbs
|
Total Resource
|
Sulphide
|
620 Mt
|
Gold
|
0.56 g/t
|
11,090 koz
|
Total Resource
|
Sulphide
|
620 Mt
|
Silver
|
3.39 g/t
|
67,681 koz
|
Heavy Mobile Equipment as of December 31, 2021:
HME Type | Quantity |
Load-Haul-Dump (LHD)
|
.......................
|
Truck (haul)
|
.......................
|
- Subscription is required.
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.