Abstract: This invention relates to a booster explosive support device 10 for use in boreholes 87. The device 10 includes a securing arrangement 12 which is configured to secure an explosive booster 100 to the device 10, and a spacing element 39 which protrudes from the securing arrangement 12. The spacing element 39 has a free end which in use abuts against a closed end or bottom of a borehole, thereby supporting the securing arrangement 12 and hence an explosive booster 100 at a desired spacing from the bottom of the borehole 87. The spacing element 39 may be elongate. The invention also relates to a method of securing an explosive booster 100 at a pre-determined position in a borehole 87. The method includes spacing the explosive booster 100 away from a closed end of the borehole 87 by supporting the explosive booster 100 from an operatively lower position thereof.

Abstract: This invention relates to a booster explosive support device 10 for use in boreholes 87. The device 10 includes a securing arrangement 12 which is configured to secure an explosive booster 100 to the device 10, and a spacing element 39 which protrudes from the securing arrangement 12. The spacing element 39 has a free end which in use abuts against a closed end or bottom of a borehole, thereby supporting the securing arrangement 12 and hence an explosive booster 100 at a desired spacing from the bottom of the borehole 87. The spacing element 39 may be elongate. The invention also relates to a method of securing an explosive booster 100 at a pre-determined position in a borehole 87. The method includes spacing the explosive booster 100 away from a closed end of the borehole 87 by supporting the explosive booster 100 from an operatively lower position thereof.

Abstract: A drill hole (350) extends into rock to be blasted. A blasting accessory (310) includes a container portion (312) for holding a predetermined volume of stemming material, and a spacer (330) for spacing the stemming material a predetermined distance from a surface, e.g. a blind bottom of the drill hole. The container portion has a top (320) surrounded by a dilatable, inverted skirt forming a seal (342), and forms a support for a blasting substance like an explosive.