| 摘要 |
In a method and a device for introducing granular or pulverulent explosive into drill holes the introduction is suitably carried out by means of a hose like or tube like conduit (2) introducable into the drill hole, the explosive being transported through the conduit, e.g. with pressurized air. To obtain an explosive power reduced in relation to that obtained by complete filling of the drill holes with the explosive, only partial filling of the drill holes is carried out by either a) providing the conduit (2) with a tool (12), which on withdrawal of the conduit out of the drill hole leaves an air filled cavity in the drill hole, or b) arranging in the drill hole elongated filler means (24) and carrying out feeding of the explosive while said means is located within the drill hole. |
