Patent ID: 9702226
Date: 2017-07-11
CPC Classifications: E21B,F42B,F42D

Claim:
1. A booster explosive support device for use in boreholes, the device including: a securing arrangement configured to secure an explosive booster to the device; and an elongate spacing element which protrudes from the securing arrangement, the spacing element having a free end which in use abuts against a closed end or bottom of a borehole thereby supporting the securing arrangement and hence an explosive booster at a desired spacing from the bottom of the borehole, the elongate spacing element including an elongate stem, one end of which is connected to the securing arrangement, and a foot or anchor formation connected to the other end of the stem, the foot, or anchor formation defining an operatively upper anchor surface onto which primary explosive material can be introduced when the device is positioned in a borehole, in order to aid in securing/anchoring the device in the borehole.