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blast (v.): Old English blæstan "to blow, belch forth," from the root of blast (n.). Since 16c., often "to breathe on balefully." Meaning "to blow up by explosion" is from 1758. Related: Blasted; blasting. Blast off (n.) is attested from 1950.
sand-blast (v.): 1878 (implied in sand-blasted), from sand (n.) + blast (v.). Related: Sand-blasting.
tamp (v.): 1819, "to fill (a hole containing an explosive) with dirt or clay before blasting," a workmen's word, perhaps a back-formation from tampion, that word being mistaken as a present participle (*tamping).
tonite (n.): explosive used in blasting, 1881, from Latin tonare "to thunder" (see thunder (n.)) + -ite (2).
gelignite: "A high explosive made from a gel of nitroglycerine and nitrocellulose in a base of wood pulp and sodium or potassium nitrate, used particularly for rock-blasting", Late 19th century: probably from gelatin + Latin (l)ignis 'wood' + -ite¹.