(19)

(11)

EP 2 396 621 A1

(12)

(43) Date of publication: 21.12.2011 Bulletin 2011/51 (21) Application number: 10740830.4 (22) Date of filing: 09.02.2010

(51) International Patent Classification (IPC):  F42D 1/00(2006.01) E21C 41/16(2006.01) E21C 41/26(2006.01) F42D 3/04(2006.01) (86) International application number: PCT/AU2010/000130 (87) International publication number: WO 2010/091455 (19.08.2010 Gazette 2010/33)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 10.02.2009 AU 2009900532 (71) Applicant: Dyno Nobel Asia Pacific Pty Limited Southbank, Victoria 3006 (AU)	(72) Inventor: Dyno Nobel Asia Pacific Pty Limited Southbank, Victoria 3006 (AU) (74) Representative: Papula Oy  Mechelininkatu 1 a 00180 Helsinki 00180 Helsinki (FI)