今年2月23日,昆明钢铁公司龙山熔剂矿决定在石灰石采场作一次装炸药3,282公斤的深孔大爆破作业。起爆前采矿工区派出工人,手持红绿旗,到通道路口警戒,从11点半钟起撤出警戒区内的一切人员、车辆。 谁料到,在路口担任警戒的青年工人王学云、周建新以为离起爆时间还早,就到食堂吃 February 23 this year, Kunming Iron and Steel Company Longshan flux mine decided to limestone stope for loading a deep hole blasting 3,282 kg large blasting operations. Prior to the detonation, workers were dispatched from the mining area and armed with red and green flags to alert the passageways. All personnel and vehicles within the security zone were evacuated from 11:30 onwards. Surprisingly, Wang Xueyun, a young worker who served as a guard at the crossing, thought Zhou Jianxin was still early from the time of detonation and went to the canteen to eat