Self-propelled Abrasive Jet Reamer/miner for Deviated Boreholes in Rock.
Archibald-JH; Miller-AL; Savanick-GA
Ch 48 in Proceeds: 1991 :11 pages
As part of its continuing research on selective mining, the U.S. Bureau of Mines has made progress toward developing a tool capable of remotely extracting hard minerals through a borehole. As the successor to the successful borehole miner, which extracted soft materials through a straight borehole, this new device has several innovative features: (1) it can propel itself in and out of an 8-in borehole, (2) it can cut hard rock with an abrasive jet and transport the cuttings to the surface, and (3) it can negotiate deviated boreholes--the feature that enables it to follow a vein and extract only the values. This paper describes the development and feature testing of the reamer-miner.
Ch. 48 in Proceeds: 1991 Rapid Excavation & Tunneling Conference, SME, 829-839