blast underground

基本解释

The hard top-coal pre-weakening blast is an especial kind of the mine underground blast.
坚硬顶煤预先弱化爆破是一种井下特殊爆破形式。
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.
续昨天报道，为了逃避圣诞而付钱租住地下核堡的英国人科林·伍德在平安夜溜出地堡，为得竟是一个全英国男人都会为之喝彩的理由：一品脱啤酒！
When a nuclear blast that large goes off underground, it sends a shockwave of disturbed air into the ionosphere.
当核爆破离开地下，它会传递一种干扰空气的震荡波到电离层。

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