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:
Oct. 30, 1990
Filed:
Jan. 17, 1986
Applicant:
Inventor:
Gwyn Harries, Elsternwick, AU;
Assignee:
ICI Australia Limited, Victoria, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
299 13 ; 166271 ; 166259 ; 299-4 ; 102311 ;
Abstract
The invention provides a process for converting subterraneous ore overlain by an adjacent formation of porous rock into an enclosed zone of fragmented ore by first blasting a void space in the porous rock and secondly explosively expanding the ore into the void space. The invention also provides a process for the extraction and recovery of values from a subterraneous ore overlain by an adjacent formation of porous rock. The invention is particularly useful for the extraction and recovery of carbonaceous values from subterraneous oil shale.