tunnel blasting

tunnel blasting

[′tən·əl ‚blast·iŋ]
(engineering)
A method of heavy blasting in which a heading is driven into the rock and afterward filled with explosives in large quantities, similar to a borehole, on a large scale, except that the heading is usually divided in two parts on the same level at right angles to the first heading, forming in plan a T, the ends of which are filled with explosives and the intermediate parts filled with inert material like an ordinary borehole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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"We'll have to go back and get some of your big tunnel blasting powder, Tom," suggested Ned.
A miner died from an accident during a tunnel blasting operation at a small-scale mine in Itogon town in Benguet province on Wednesday morning (April 26), according to a belated report from the Cordillera police.
[31] used FDM to analyze dynamic response of ground structures induced by underground tunnel blasting. Lu et al.
Once the portal on both sides is cut back and secured the main tunnel blasting begins.
Having witnessed the wind tunnel blasting of both the Johnny Patrick and Fat Chops Big Bands in the last few months the BBC Big Band sounded much more sedate from the vantage point of Symphony Hall's Level 5.