Accession Number : ADA122039

Title :   Flame Jet Drilling and Chambering to Great Depths in Crystalline Rock.

Descriptive Note : Final rept. 1 Mar-31 Aug 82,

Corporate Author : BROWNING ENGINEERING CORP HANOVER NH

Personal Author(s) : Browning,James A.

Report Date : NOV 1982

Pagination or Media Count : 18

Abstract : A flame-jet drill consuming 34cu. m of compressed air at 20 kg/sq cm has drilled a 40 cm diameter hole in Barre, Vermont granite to a depth of 130 meters. With a cost of less than $10 per foot of hole it is recommended that depth capability be increased significantly. (Author)

Descriptors :   *DRILLING, *JET FLAMES, PERFORMANCE(ENGINEERING), GRANITE, BOREHOLES, AIR COMPRESSORS, SPALLATION, OIL BURNERS, DEEP DEPTH, HOSES.

Subject Categories : Geology, Geochemistry and Mineralogy
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE