EP 0248610 A1 19871209 - Rock breaking method and tool.
Title (en)
Rock breaking method and tool.
Title (de)
Verfahren und Werkzeug zur Gesteinszertrümmerung.
Title (fr)
Méthode et outil pour briser des roches.
Publication
Application
Priority
- ZA 862724 A 19860531
- ZA 866991 A 19860915
Abstract (en)
A method of breaking rock and a rock breaking tool for use therein in which a hole (8) is drilled in the rock, and substantially filled with water, and a barrel (1) of a rock breaking tool is inserted into the hole, the tool being operable to discharge a cartridge from a firing chamber (4) down the barrel, and discharging the cartridge down the barrel to cause an impulsive energy shock in the water to break up the rock, the barrel being short so as to be inserted in the entrance portion only of the hole and a blast absorbing mat is located over the tool to retain it substantially in position in the hole during discharge of the cartridge.
IPC 1-7
IPC 8 full level
E21C 37/12 (2006.01); F42D 5/05 (2006.01)
CPC (source: EP)
E21C 37/12 (2013.01); F42D 5/05 (2013.01)
Citation (search report)
- [X] US 4449754 A 19840522 - ORLOV NAUM Y [SU], et al
- [Y] CA 1019202 A 19771018 - ROBERTSON THOMAS A, et al
- [A] GB 1408541 A 19751001 - UK OTDEL V G P IZYSKATEL
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0248610 A1 19871209; AU 7361487 A 19871203; BR 8702782 A 19880301; ZW 9887 A1 19870902
DOCDB simple family (application)
EP 87304794 A 19870529; AU 7361487 A 19870528; BR 8702782 A 19870529; ZW 9887 A 19870529