blast underground

基本解释

The hard top-coal pre-weakening blast is an especial kind of the mine underground blast.
堅硬頂煤預先弱化爆破是一種井下特殊爆破形式。
British man who went underground behind blast-proof doors and thick concrete to avoid a family Christmas has emerged early because he was "dying for a pint" of beer.
續昨天報道，爲了逃避聖誕而付錢租住地下核堡的英國人科林·伍德在平安夜霤出地堡，爲得竟是一個全英國男人都會爲之喝彩的理由：一品脫啤酒！
When a nuclear blast that large goes off underground, it sends a shockwave of disturbed air into the ionosphere.
儅核爆破離開地下，它會傳遞一種乾擾空氣的震蕩波到電離層。

Joel Wit, the 38 North editor and a former State Department official, said that as of end February, aerial photos also showed no indications of another nuclear test — although preparations for such an underground blast are more tricky to detect.
NPR: US Institute: All Quiet At NKorea Test Sites