Overview
Stage | Production |
Mine Type | Open Pit & Underground |
Commodities |
- Coal (metallurgical)
- Coal (thermal)
|
Mining Method |
- Truck & Shovel / Loader
- Dragline
- Continuous
- Bord-and-pillar
|
Production Start | ...  |
Mine Life | 20 years (as of Jan 1, 2019) |
The Gregory Crinum mine, comprises the Crinum underground mine and Gregory open cut mine. Production commenced at Gregory in 1979, Crinum mine (longwall) commenced in 1997. Production at Gregory open-cut mine ceased in October 2012. Production at Crinum underground mine ceased in November 2015. On 27 March 2019, BMA completed the sale of Gregory Crinum Mine to Sojitz Corporation. The underground mining area was successfully re-entered in late October 2020. On Nov. 4, 2021, Mastermyne has restarted surface works at the Crinum coal mine in Queensland following an incident involving a fall of ground in September 2021. |
Source:
On 27 March 2019, BHP Mitsubishi Alliance (BMA) joint venture partners BHP and Mitsubishi Development Pty Ltd (Mitsubishi) confirmed completion of the sale of the Gregory Crinum Mine in central Queensland, to Sojitz Corporation.
Contractors
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Summary:
The Bowen Basin in Central Queensland contains most of Australia’s high quality metallurgical (coking and pulverised coal injection (PCI)) coal reserves, as well as significant deposits of thermal coal.
Bituminous coal is mined from the Permian German Creek Coal measures.
Mining Methods
- Truck & Shovel / Loader
- Dragline
- Continuous
- Bord-and-pillar
Summary:
Gregory–Crinum, a hard-coking coal mine 60 km north east of Emerald, reopened after being placed in care and maintenance by previous owners.
Sojitz acquired the Gregory Crinum metallurgical coal mine from BMA in 2019 and is currently mining from the open cut area, with a further strategy to investigate the viability of re-opening the previously sealed Crinum underground mining area.
Crinum mine
During 2020, Sojitz appointed Mastermyne to undertake a feasibility study focusing on the development of a high productivity bord and pillar mining operation. In parallel, Mastermyne were also engaged as the Mine Operator to undertake the re-entry process. The underground mining area was successfully re-entered in late October 2020, with no issues encountered. Mastermyne has continued as the Mine Operator whilst Sojitz finalised internal approvals.
The project scope includes the re-establishment of the underground infrastructure including conveyor systems, ventilation, associated mine services, remediation works and surface infrastructure all of which is expected to take approximately 6 months. Following the re-establishment works the mine will immediately transition into production with a staged ramp up to 3 bord and pillar mining units. The underground mine will produce approximately 11 million tonnes ROM (run of mine) over the life of the project. Mining production is planned to commence late this calendar year.
At full production, ........

Source:
Summary:

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Production:
Commodity | Units | 2022 | 2021 | 2020 |
Coal (metallurgical)
|
t
| ......  | ......  | ......  |
Coal (thermal)
|
t
| | | ......  |
All production numbers are expressed as clean coal.
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Operational Metrics:
Metrics | 2022 | 2021 | 2020 |
Coal tonnes mined
| ......  | ......  | 1,119,338 t of ROM coal |
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Reserves at June 30, 2018:
Cut-off criteria:
Coal Resources UG: 2.0m seam thickness
Category | OreType | Tonnage | Commodity | Marketable Coal |
Proven
|
In-Situ (OP)
|
6.6 Mt
|
Coal (metallurgical)
|
5.4 Mt
|
Probable
|
In-Situ (OP)
|
0.3 Mt
|
Coal (metallurgical)
|
0.2 Mt
|
Proven & Probable
|
In-Situ (OP)
|
6.9 Mt
|
Coal (metallurgical)
|
5.6 Mt
|
Measured
|
In-Situ (OP)
|
7.9 Mt
|
Coal (metallurgical)
|
|
Indicated
|
In-Situ (OP)
|
0.7 Mt
|
Coal (metallurgical)
|
|
Indicated
|
In-Situ (UG)
|
112 Mt
|
Coal (metallurgical)
|
|
Inferred
|
In-Situ (UG)
|
0.3 Mt
|
Coal (metallurgical)
|
|
Total Resource
|
In-Situ (OP)
|
8.6 Mt
|
Coal (metallurgical)
|
|
Total Resource
|
In-Situ (UG)
|
113 Mt
|
Coal (metallurgical)
|
|
Type | Material | Diameter | Length | Description |
HME Type | Model | Quantity | Leased or Contractor | Ref. Date |
Continuous Miner
|
|
.......................
|
|
May 31, 2021
|
Dragline
|
.......................
|
.......................
|
|
Jul 31, 2019
|
Excavator
|
.......................
|
.......................
|
|
Jul 31, 2019
|
Excavator
|
.......................
|
.......................
|
|
Jul 31, 2019
|
Excavator
|
|
.......................
|
|
Jul 31, 2019
|
Truck (haul)
|
|
.......................
|
|
Jul 31, 2019
|
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Corporate Filings & Presentations:
Document | Year |
Other
|
2022
|
...................................
|
2021
|
...................................
|
2020
|
...................................
|
2019
|
Annual Report
|
2017
|
Annual Report
|
2015
|
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- Subscription is required.