Breaking or blasting or splitting of rock
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United States of America Patent
Stats
-
Nov 20, 2001
Grant Date -
N/A
app pub date -
Jan 8, 1999
filing date -
Dec 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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