PRIMER CASING AND METHOD OF CHARGING A BLASTHOLE
    7.
    发明公开
    PRIMER CASING AND METHOD OF CHARGING A BLASTHOLE 有权
    保险盖和方法填充孔

    公开(公告)号:EP1194728A4

    公开(公告)日:2004-06-16

    申请号:EP00941794

    申请日:2000-07-07

    IPC分类号: F42D1/22 F42B3/103

    CPC分类号: F42D1/22

    摘要: Primer casing (1) comprising sleeve portion (5) and leading portion (5a), wherein sleeve portion (5) includes tabs (6) to retain primer (11) and blasthole engagement means (2), and wherein leading portion (5a) comprises nose cone (8). Engagement means (2) comprises an array of rigid, multiple projections that are hinged and movable between a retracted position and a blasthole engagement position. Explosive loading hose (13) locates within hose receiving sleeve (7) and can be used to push primer casing (1) into the desired location within the blasthole prior to filling the blasthole with bulk explosive. Methods of loading a blasthole comprising inserting primer (11) into primer casing (1) and positioning primer casing (1) at a desired location in a blasthole are also described and claimed.