2011年2月25日14:56,某公司高炉运行作业区行车工李立(女,38岁)在休息期间从行车上下来,准备去车间办公室办事。她应该从非危险区域到车间办公室,但为了抄近道,她经炉前区域去办公室,沿途要通过残铁地坑。正常情况下残铁地坑是有盖板盖住的。当天由于地坑盖板因作业需要吊开未盖上, At 25:45 on February 25, 2011, Li Li (female, 38 years old), a mechanic in blast furnace operation area of ​​a certain company, got off the road during the break and was ready to go to the office of the workshop. She should move from a non-hazardous area to a workshop office, but to get to the shortcut, she went to the office through the front of the furnace and went through a rubbish pit along the way. Under normal circumstances, the iron pit is covered with a cover. The same day as the pit cover due to the operation needs to be uncovered,