blind borer

blind borer

[′blīnd ′bȯr·ər]
(mining engineering)
A shaft-boring machine that does not require a pilot hole.
References in periodicals archive ?
This year, South Africa-based Master Drilling showed their concept 600-ton monster blind borer to sink shafts up to 2 km deep in one continuous process.
A model drawn up by engineering consultants WorleyParsons on a case study gold mine showed the blind borer would sink a shaft in 18 months, instead of three years by conventional means.