Overview
Stage | Permitting |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Room-and-pillar
- Drift & Fill
- Cemented rockfill
|
Mine Life | 11 years (as of Jan 1, 2021) |
The Energy Fuels intends to continue its permitting and related activities at the Roca Honda Project during 2024. Permitting efforts in 2024 include the integration of the Adjacent Roca Honda Properties into the permitting efforts underway for the Roca Honda Project properties, including the submittal of a revised National Pollutant Discharge Elimination System (“NPDES”) permit application to the EPA and continuation of the Supplement to the Draft EIS through the USFS. |
Source:
p. 99,100
Since May 27, 2016, the Roca Honda Project has been held solely by Strathmore Resources (US) Ltd (Strathmore), which is a wholly owned subsidiary of Energy Fuels Inc.
Contractors
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Summary:
Mineralization
The uranium mineralization found in the Mine area is contained within five sandstone units of the Westwater Canyon Member. Zones of mineralization vary from approximately one foot to 30 ft thick, 100 ft to 600 ft wide, and 200 ft to 3,000 ft in length in elongated pods. Uranium mineralization in the Mine area west to east, and northwest to southeast depending on general area within the Mine area, consistent with trends of the fluvial sedimentary structures of the Westwater Canyon Member, and the general trend of mineralization across the Ambrosia Lake subdistrict.
Core recovery from the 2007 drilling program indicates that uranium occurs in sandstones with large amounts of organic/high carbon material. Non-mineralized host rock is much lighter (light brown to light grey,) and it has background to slightly elevated radiometric readings.
Uranium mineralization in the Mine area is believed to be predominantly primary ("trend") mineralization, with some secondary mineralization due to oxidation and mobilization of uranium near permeable geologic structures. Uranium mineralization consists of dark organic-uranium oxide complexes. The uranium in the Mine area is dark grey to black in color and is found between depths of approximately 1,380 ft to 2,600 ft below the surface. Although coffinite and uraninite have been identified in the Grants uranium district, their abundance is not sufficient to account for the total uranium content in a mine ........
Mining Methods
- Room-and-pillar
- Drift & Fill
- Cemented rockfill
Summary:
As currently envisaged, mining at the Project will be based on an average production rate of 1,050 stpd using a combination of step room-and-pillar (SRP) and drift-and-fill (DF) mining methods. Rubber tired mechanized mining equipment will provide operational flexibility in the mine in response to changing orebody geometry. Broken mineralized material will be transported by truck to ore passes leading to a skip pocket and hoisted to surface from either the Section 16 or Section 17 shaft. Cemented rockfill will be placed in mined out areas for ground control. Mining will prioritize the highest-grade areas first by Section, and in the case of stacked mineralized zones, top-down. Mineralized material will be stockpiled on surface and hauled by truck to EFR's White Mesa Mill for processing.
Mine surface infrastructure will be based at the Section 16 shaft area and include all support buildings, mine ventilation fans, batch plant, ore and waste stockpiles, pump infrastructure and a water treatment plant with associated holding ponds.
A minor amount of infrastructure will also be required on Section 17 (Lee Ranch) to support mine operations. A concrete lined shaft, with a 14 ft finished diameter, exists in Section 17 to a depth of 1,475 ft. An additional 186 ft of sinking is required to reach its design elevation. Existing infrastructure on Section 17 includes line power, a hoist house, maintenance building, and a one-acre pond used to hold water during shaft ........
Source:
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Flow Sheet:
Summary:
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Source:
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Projected Production:
Commodity | Units | Avg. Annual | LOM |
Uranium
|
M lbs
| 2.5 | 28 |
All production numbers are expressed as U3O8.
Operational Metrics:
Metrics | |
Daily ore mining rate
| ...... |
Daily mining capacity
| ...... |
Daily processing rate
| ...... |
Daily processing capacity
| ...... |
Annual ore mining rate
| ...... |
Annual processing capacity
| ...... |
Waste tonnes, LOM
| ...... |
Ore tonnes mined, LOM
| ...... |
Tonnes processed, LOM
| ...... |
* According to 2021 study.
Reserves at December 31, 2021:
Mineral Resources are estimated at a uranium cut-off grade of 0.19% U3O8.
Category | Tonnage | Commodity | Grade | Contained Metal |
Measured
|
208 k tons
|
U3O8
|
0.477 %
|
1,984 k lbs
|
Indicated
|
1,639 k tons
|
U3O8
|
0.477 %
|
15,638 k lbs
|
Measured & Indicated
|
1,847 k tons
|
U3O8
|
0.477 %
|
17,622 k lbs
|
Inferred
|
1,513 k tons
|
U3O8
|
0.457 %
|
13,842 k lbs
|
Corporate Filings & Presentations:
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