The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Jan. 08, 1999
Johann Mey, Parow, ZA;
Denel (Proprietary) Limited, Pretoria, ZA;
Abstract
A method of breaking rock (,), e.g. in underground mining, includes drilling a hole in the rock mass by means of a drilling machine (,) having an articulated boom (,) and a drilling tool (,) at the end of the boom (,). After drilling, the drilling tool (,) is retracted, charge means is indexed with the hole, and a rock breaking charge (,) is charged into the hole. The charge (,) includes a propellant, a fuse head (,), and a tamping medium (,), conveniently contained in the casing (,). The tamping medium (,), e.g. a two-component resin, is discharged into the hole and allowed to set around and rearward of the propellant. The driving machine (,) is removed and the propellant is actuated from a remote position, e.g. electrically.