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Basic Rock Disintegration Mechanisms
Drilling and Kerfing Equations
Combination Drilling Systems
26 other sections not shown
advance rate Barre granite basalt Berea sandstone BHRA Fluid Engineering bit drilling borehole borehole mining Carstens cavitating jets cm deep cm diameter cm/sec compressive strength conducted a series Cranfield craters cut kerfs decreased detonator Drill Bit drill shown drilling mud drilling rate drilling tests drillpipe electrical electron beam Excavation explosive capsules explosive drill flame jet granodiorite hard rock heat high pressure jets hole bottom Hydraulic impact increased Indiana limestone J/cc jet assisted jet bits Jet Cutting Tech jet drilling jet kerfing jet pressure kerf depth kerfing tests laser beam m/hr Maurer mechanism melt Newsom nozzle nozzle diameter penetration plasma power output produced projectiles pump quartzite roller bit rotating Schumacher shaped charge shown in Fig spalling spark drill specific energy specific kerfing energy stagnation pressures standoff distance STRATAPAX bits Subterrene Symp Table temperature traverse speed tunnel boring machine tunneling machine U.S. Patent velocity water jets
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