The victim was carried to the health management room, where an industrial physician gave first aid (cooling of the injured part) to him.
The victim was taken to Gomi Clinic and received treatment.
* Girders were installed on the back side of the cover to prevent it from slipping to one side. But, because of structural problems, the edge of a cover can slip out of the fulcrum and collapse under feet when the cover at a joint section of pits slips, for example, to the location shown in the above figure.