Breaking or blasting or splitting of rock

F - Mech Eng,Light,Heat,Weapons – 42 – D

Patent

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Details

F42D 3/04 (2006.01) F42B 3/00 (2006.01) F42D 1/10 (2006.01) F42D 1/20 (2006.01) F42D 1/24 (2006.01) F42D 3/00 (2006.01)

Patent

CA 2239823

A method of breaking rock (18), e.g. in underground mining, includes drilling a hole in the rock mass by means of a drilling machine (20) having an articulated boom (22) and a drilling tool (24) at the end of the boom (22). After drilling, the drilling tool (20) is retracted, charge means is indexed with the hole, and a rock breaking charge (30) is charged into the hole. The charge (30) includes a propellant, a fuse head (40), and a tamping medium (34), conveniently contained in the casing (32). The tamping medium (34), e.g. a two-component resin, is discharged into the hole and allowed to set around and rearward of the propellant. The driving machine (20) is removed and the propellant is actuated from a remote position, e.g. electrically.

Lors d'opérations minères, un procédé de rupture de roches (18) consiste à forer un trou dans la masse rocheuse à l'aide d'une foreuse (20) dotée d'un bras articulé (22), portant à son extrémité un outil à percer (24), puis à rétracter ce dernier, à positionner un dispositif contenant une charge en face de ce trou et à placer cette charge (30) de rupture de roche dans ledit trou. Cette charge (30) comprend un agent propulsif, une tête de mêche (40) et une bourre (34) disposés par commodité dans la douille (32). La bourre (34), à savoir une résine à deux composants, est déversée dans le trou où on la laisse prendre autour et à l'arrière de l'agent propulsif. On retire la foreuse (20) et on met à feu, électriquement par exemple, cet agent propulsif à distance.

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