ring holes

ring holes

[′riŋ ‚hōlz]
(mining engineering)
The group of boreholes radially drilled from a common-center setup.
References in periodicals archive ?
Slotted clamp ring holes offer extra clearance for mounting hardware, resulting in a noticeably easier installation.
Slotted clamp ring holes offer 187% extra clearance for mounting hardware, resulting in a noticeably easier installation," explains Matt Wolford, product manager for Dodge couplings.
2) definition drilling involving 44 ring holes setting up on 8 drill bays spaced at 40m intervals from 14910E to 15180E.