Blast hole slotting: Reducing over breakage during coal mine blasting

Stockwell, Matt and Tadic, Dihon (2010). Blast hole slotting: Reducing over breakage during coal mine blasting. In: Bevan B. Beamish and David Cusack, 2010 Australian Mining Technology Conference : Technology changing the mining business footprint. 2010 Australian Mining Technology Conference: Technology Changing the Mining Business Footprint, Perth, WA, Australia, (47-56). 13-15 September 2010.

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Name Description MIMEType Size Downloads
Author Stockwell, Matt
Tadic, Dihon
Title of paper Blast hole slotting: Reducing over breakage during coal mine blasting
Conference name 2010 Australian Mining Technology Conference: Technology Changing the Mining Business Footprint
Conference location Perth, WA, Australia
Conference dates 13-15 September 2010
Proceedings title 2010 Australian Mining Technology Conference : Technology changing the mining business footprint
Place of Publication Pinjarra Hills, Qld, Australia
Publisher CRC Mining
Publication Year 2010
Sub-type Fully published paper
ISBN 9781921522277
Editor Bevan B. Beamish
David Cusack
Start page 47
End page 56
Total pages 10
Collection year 2011
Language eng
Abstract/Summary CRCMining’s blast hole slotting system offers a potential means of reducing coal loss and dilution via an innovative method to control fracture propagation during blasting in open cut coal mining. The Centre has developed high-pressure water jet technology to cut a slot into the wall at the base of a blast hole to create a narrow disc-shaped cavity. These slots act to protect the coal seam during blasting by directing fractures radially from the base of each hole. Mine site blasting tests demonstrated that an area of slotted blast holes can reduce energy transfer and subsequent blast damage to the rock below the blast hole toe horizon. Slotting reduced the average depth of fragmentation by 58% when compared to an equivalent set of conventional blast holes. This encouraging result provides a clear indication that slotting has the capability to improve coal recovery whilst maintaining the desired fragmentation in the target zone.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 25 Mar 2011, 16:12:08 EST by Deanna Mahony on behalf of School of Mechanical and Mining Engineering