Initiation is chosen so that during the blasting and collapse procedure, the bridge is subjected to as much stress as possible . 选择的起爆方法应使桥梁在爆破及坍塌的过程中，受到尽可能大的应力。
They could see the grass-thatched shed lift and collapse, while a froth of foam cleared the crest of the sand and ran down to the lagoon . 他们瞧见那棚屋的草顶往上一掀，坍塌下来，一道溅着白沫的波浪越过沙堤，流进湖内。
Now, just as he had fought his way to the top, his hold had given way and he was pitching down head-long into darkness . 而现在，正当他奋力找到了一条通向顶峰的道路时，攀缘之处突然坍塌，他正在头朝下向黑暗的深渊坠落下去。
They died after the roof collapsed on top of them 他们是在屋顶坍塌之后死亡的。
After three years his life had caved in 就这样过了3年之后，他的生活开始坍塌了。
Cause analysis for collapse accident of a silo top 某筒仓仓顶施工坍塌事故原因分析
They died after the roof collapsed on top of them 消防队员是在屋顶坍塌后死亡的。
Horizontal hole springing and rock breaking - out blasting 平孔药壶坍塌爆破技术
Analysis of borehole collapse cycling time for shale 泥页岩井壁坍塌周期分析
The roof is dangerous and could cave in at any time 屋顶很危险，任何时候都会坍塌。
