Method of mining ore

• US 8,840,190 B2
• Filed: 12/08/2009
• Issued: 09/23/2014
• Est. Priority Date: 12/08/2008
• Status: Active Grant

• Current Assignee: Technological Resources Pty. Ltd. (Rio Tinto Limited)
• Original Assignee: Technological Resources Pty. Ltd. (Rio Tinto Limited)
• Inventors: Stokes, Andrew
• Primary Examiner(s): KRECK, JOHN J
• Application Number:
  US13/133,365
• Publication Number:
  US 20120001474A1
• Time in Patent Office: 1,750 Days
• Field of Search: 299/1.9, 299/19
• US Class Current: 299/1.9
• CPC Class Codes: E21C 41/00 Methods of underground or surface mining E21C45/00 takes precedence; Layouts therefor for peat E21C49/00
• CPC Class Codes: E21C 41/26 Methods of surface mining machines for obtaining, or the removal of, materials in open-pit mines E21C47/00; Layouts therefor
• CPC Class Codes: E21C 41/30 for ores, e.g. mining placers

Abstract

A method of open cut mining an ore is disclosed. The method comprises carrying out mining operations in an area of an open cut mine with manned resources and unmanned resources and providing separate access for these resources to the mine area at selected locations. Alternatively, or in addition, the method comprises carrying out mining operations in the mine area with manned resources and unmanned resources operating in selected, separate unmanned and manned zones, respectively within the mine area.

Claims

1. A method of open cut mining an ore in a mine area of an open cut mine with manned resources in the form of manned haulage trucks and unmanned resources in the form of autonomous haulage trucks, the method including:

providing access to the mine area for manned haulage trucks at a first location;

providing separate access to the mine area for autonomous haulage trucks at a second location; and

carrying out mining operations with manned haulage trucks and autonomous haulage trucks in the mine area, with the manned haulage trucks and autonomous haulage trucks operating in selected, separate unmanned and manned zones within the mine area; and

further comprising changing both the manned and unmanned zones as mining operations progress in the mine area having regard to the requirements of the mining operations.

2. The method defined in claim 1, comprising changing the size of manned and unmanned zones in response to changes in the location of loading ore for haulage out of the mine area.

3. The method defined in claim 2, comprising, after a new section of the mine area is drilled and blasted or otherwise made ready for excavation, increasing the size of an unmanned zone that is proximate the new section to allow autonomous haulage trucks to move into the new section and be loaded with ore that is picked up by excavators.

4. The method defined in claim 1, comprising providing at least three access locations for manned haulage trucks and autonomous haulage trucks.

5. The method defined in claim 1, comprising selecting the locations of the haulage truck access locations to maximise productivity of mining operations in the mine area.

6. The method defined in defined in claim 1, comprising providing timed access for autonomous and manned haulage trucks to travel through each haulage truck access location to minimise the risk of interaction.

7. The method defined in claim 1, wherein the access locations comprise vehicle drive-off sections to allow haulage trucks (manned or autonomous) to park temporarily while other haulage trucks move through the access locations.

8. The method defined in claim 1, comprising establishing new resource access locations to the mine area as mining progresses within the area so as to maintain separation of unmanned and manned mining operations within the area.

9. The method defined in claim 1, wherein the mine area includes a manned zone in which manned haulage trucks operate to the exclusion of autonomous haulage trucks, with the manned haulage trucks having access to the manned zone from the first location.

10. The method defined in claim 1 or claim 9, comprising providing identifiable access roads for manned and autonomous haulage trucks within the mine area.

11. The method defined in claim 1, comprising carrying out different mining operations in different sections of the unmanned zone or zones as mining operations progress in the mine area.

12. The method defined in claim 11, comprising carrying out different mining operations in different sections of the manned zone or zones as mining operations progress in the mine area.

13. The method defined in claim 1, comprising precluding access of autonomous haulage trucks into the manned zone or zones.

14. The method defined in claims 13, comprising precluding access of manned haulage trucks into the unmanned zone or zones.

15. The method defined in claim 1 or claim 9, wherein the operations in the manned zone or zones comprise any one or more of grading the zone or zone, taking samples of ore in the zone or zones for analysis, and drilling blast holes, charging explosives into the blast holes, and blasting at least a part of the zone to release ore for removal from the mine.

16. The method defined in claim 1 or claim 9, wherein the mine area includes an unmanned zone in which autonomous haulage trucks operate to the exclusion of manned haulage trucks, with the autonomous haulage trucks having access to the unmanned zone from the first location.

17. The method defined in defined in claim 16, comprising changing the haulage trucks access locations to the mine area as mining operations progress in the mine area to allow access of autonomous haulage trucks and manned haulage trucks to new unmanned zones and manned zones, respectively, to allow efficient mining operations to continue in the mine area.

18. The method defined in claim 16, comprising changing the size of an unmanned zone for the haulage of ore out of the mine area in response to changes in the location of loading of ore for haulage out of the mine area.

19. The method defined in claim 16, comprising changing the size of an unmanned zone for the haulage of ore out of the mine area to retain the same resource access location or locations to the unmanned zone.

20. The method defined in claim 16, comprising changing the amount of use of each haulage truck access location to minimise the amount of disruption to the autonomous haulage trucks within the unmanned zone or zones for the haulage of ore during any adjustment in the zones in response to a change in location of loading of ore for haulage out of the mine area.