EP 0059910 A3 19840404 - MINING METHOD FOR DEEP COAL SEAMS
Title (en)
MINING METHOD FOR DEEP COAL SEAMS
Publication
Application
Priority
DE 3108425 A 19810306
Abstract (en)
[origin: US4451088A] A process for gaining access to the coal of very deep seams, and for extracting this coal with the aid of a conveying liquid, which is fed to the seams via boreholes and is thence brought back again to the surface with coal which has been detached, wherein agents for detaching and breaking up the coal are admixed to the liquid.
IPC 1-7
IPC 8 full level
E21B 43/263 (2006.01); E21B 43/29 (2006.01)
CPC (source: EP US)
E21B 43/263 (2013.01 - EP US); E21B 43/29 (2013.01 - EP US); E21B 43/292 (2013.01 - EP US)
Citation (search report)
- [Y] US 3964792 A 19760622 - ARCHIBALD PAUL B
- [Y] US 3993146 A 19761123 - POUNDSTONE WILLIAM N, et al
- [A] US 3070361 A 19621225 - PEW III JOSEPH N
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0059910 A2 19820915; EP 0059910 A3 19840404; EP 0059910 B1 19860507; AU 543253 B2 19850404; AU 8115782 A 19820909; DE 3108425 A1 19820923; DE 3270947 D1 19860612; DK 96782 A 19820907; IN 156662 B 19851012; NO 158516 B 19880613; NO 158516 C 19880921; NO 820684 L 19820907; US 4451088 A 19840529; ZA 821463 B 19830223
DOCDB simple family (application)
EP 82101531 A 19820227; AU 8115782 A 19820305; DE 3108425 A 19810306; DE 3270947 T 19820227; DK 96782 A 19820305; IN 144CA1982 A 19820205; NO 820684 A 19820304; US 34820082 A 19820212; ZA 821463 A 19820305