Invention Grant
- Patent Title: Block caving method
- Patent Title (中): 块塌方法
-
Application No.: US13580280Application Date: 2011-02-22
-
Publication No.: US08820847B2Publication Date: 2014-09-02
- Inventor: Max Edward Oddie , Colin Ian Jones , Pierre Labrecque , Fredric Christopher Delabbio
- Applicant: Max Edward Oddie , Colin Ian Jones , Pierre Labrecque , Fredric Christopher Delabbio
- Applicant Address: AU Melbourne, Victoria
- Assignee: Technological Resources Pty. Ltd.
- Current Assignee: Technological Resources Pty. Ltd.
- Current Assignee Address: AU Melbourne, Victoria
- Agency: Banner & Witcoff, Ltd.
- Priority: AU2010900726 20100222; AU2010902511 20100608
- International Application: PCT/AU2011/000187 WO 20110222
- International Announcement: WO2011/100808 WO 20110825
- Main IPC: E21C41/22
- IPC: E21C41/22

Abstract:
A method of block cave mining comprising excavating undercut tunnels (21) at an undercut level; drilling undercut blast holes (25) through the undercut tunnel roofs and setting and detonating explosive charges in those holes to blast rock above the undercut tunnels to initiate the formation of broken rock caverns (26) above the undercut tunnels (21); excavating extraction level tunnels (22) at an extraction level below the undercut level; drilling drawbell blast holes (33) upwardly from the extraction level tunnels at selected drawbell locations toward the broken rock caverns (26) and setting and detonating explosive charges in those holes to blast drawbells (32) through which broken rock falls down into the extraction level tunnels (22); and progressively removing such fallen rock from the drawbell locations through the extraction level tunnels (22); wherein some of the excavation is done mechanically by tunnel boring machinery.
Public/Granted literature
- US20130106165A1 UNDERGROUND MINING Public/Granted day:2013-05-02
Information query