Method of mining ore

• US 9,845,676 B2
• Filed: 09/04/2014
• Issued: 12/19/2017
• 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:
  US14/477,120
• Publication Number:
  US 20150048668A1
• Time in Patent Office: 1,202 Days
• 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 comprising 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 with manned resources and unmanned resources, the open cut mine including an area to be mined bounded by a perimeter, the area to be mined having separate unmanned and manned zones within the perimeter, the perimeter including a first manned resource access location including a roadway, the perimeter also including a separate second unmanned resource access location including a roadway, the method including:

providing access to the unmanned zone for unmanned resources at the first unmanned resource access location in the perimeter, providing separate access to the manned zone for manned resources at the second manned resource access location in the perimeter, carrying out mining operations with manned resources and unmanned resources operating in the separate unmanned and manned zones within the perimeter, and changing the manned and unmanned zones as mining operations progress within the perimeter in response to requirements of the mining operations.

2. The method defined in claim 1, comprising carrying out mining operations within the perimeter with unmanned haulage trucks operating in the unmanned zones within the perimeter.

3. The method defined in claim 2, comprising providing identifiable access roadways for manned and unmanned haulage trucks within the perimeter.

4. The method defined in claim 1, comprising, after a new section of the perimeter is drilled and blasted or otherwise made ready for excavation, increasing the size of the unmanned zone that is proximate the new section to allow unmanned resources in the form of unmanned haulage trucks to move into the new section and be loaded with ore.

5. The method defined in claim 1, comprising carrying out different mining operations in different sections of the manned zone as mining operations progress within the perimeter.

6. The method defined in claim 1, comprising carrying out different mining operations in different sections of the unmanned zone as mining operations progress within the perimeter.

7. The method defined in claim 1, comprising precluding access of unmanned resources into the manned zone or precluding access of manned resources into the unmanned zone.

9. The method defined in claim 1, comprising providing at least three resource access locations for manned resources in the form of manned haulage trucks and unmanned resources in the form of unmanned haulage trucks.

10. The method defined in claim 1, comprising establishing new resource access locations to the perimeter as mining operations progress within the perimeter so as to maintain separation of unmanned and manned mining operations within the perimeter.

11. The method defined in defined in claim 1, comprising:

changing the resource access locations in the perimeter as mining operations progress within the perimeter to allow access of manned and unmanned resources to new manned zones and unmanned zones, respectively, to allow efficient mining operations to continue within the perimeter.

12. The method defined in defined in claim 1, comprising changing the size of an unmanned zone for the haulage of ore out of the perimeter in response to changes in the location of loading of ore for haulage out of the perimeter.

13. The method defined in defined in claim 1, comprising changing the size of an unmanned zone for the haulage of ore out of the mine area perimeter and retaining the same resource access location or locations in the perimeter to the unmanned zone.

14. The method defined in defined in claim 1, comprising minimizing the amount of disruption to the unmanned resources within the unmanned zone 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 by changing the amount of use of each resource access location by manned and unmanned resources.

15. The method defined in claim 1, comprising increasing the proportion of the unmanned zone as the mining operations progress within the perimeter until, ultimately, the whole of the perimeter has been mined and is substantially an unmanned zone within the perimeter.

16. The method defined in claim 1, comprising establishing new resource access locations in the perimeter as mining operations progress within the perimeter to allow access of manned resources and unmanned resources to new manned and unmanned zones, respectively, within the perimeter.

17. The method defined in claim 3, comprising retaining existing resource access locations in the mine area perimeter as mining operations progress within the perimeter and allowing access of manned resources and unmanned resources to new manned and unmanned zones, respectively, within the perimeter via the existing resource access locations.

18. The method defined in claim 1, comprising retaining existing resource access locations in the perimeter as mining operations progress within the perimeter and changing the function of the existing access locations so that an access location allows access of manned resources for one time period and access of unmanned resources at another time period.

8. The method defined in 1, wherein the operations in the manned zone comprise any one or more of grading the zone, taking samples of ore in the zone 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.