toe hole

toe hole

[′tō ‚hōl]
(engineering)
A blasting hole, usually drilled horizontally or at a slight inclination into the base of a bank, bench, or slope of a quarry or open-pit mine.
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References in periodicals archive ?
If the toe holes are too tight, cut a snip at the base of each toe--directions on how to do this are included.
Similarly, the systems help identify hard material so toe holes can be charged appropriately, for better fragmentation
No two players could have better expressed a game that suggested Palace was finally cutting toe holes to climb their abyss - while Wednesday were about to fall into it.