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Self-propelled Abrasive Jet Reamer/miner for Deviated Boreholes in Rock.

Archibald JH; Miller AL; Savanick GA

Ch 48 in Proceeds: 1991 :11 pages

10010859

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.

19910101

OP;

1991

OP 173-91

TCRC;

Ch. 48 in Proceeds: 1991 Rapid Excavation & Tunneling Conference, SME, 829-839