Semi-rigid sinuous blasting charge and borehole loading method

Details Semi-rigid sinuous blasting charge and borehole loading method Semi-rigid sinuous blasting charge and borehole loading method

F - Mech Eng,Light,Heat,Weapons

42

D

102/8

F42D 3/00 (2006.01) F42B 3/087 (2006.01) F42B 3/28 (2006.01)

Patent

CA 1062542

Abstract of the Disclosure A blasting charge, e.g., for pre-splitting, easy to load into boreholes and to maintain in wet boreholes when the charge density is low, comprising an elongated sinuous length of semi-rigid tubing, e.g., polyethylene, laden with explosive, e.g., a water-bearing explosive, the charge having sufficient rigidity that when unwound from a coil and fed into a borehole it retains a degree of curva- ture and exerts pressure against the wall of the borehole. Loading explosive into a borehole by unwinding a coiled length of semi-rigid explosive-laden tubing and feeding the tubing into the hole, the leading end of the tubing being provided with explosives-retaining means, e.g., a 180° bend in the tubing together with a sleeve fitting over the bent portion of the tubing. -1-

224528

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