the hard connecting rod is affected by the driving vibration of the battery car. According to the information of Sohu. com, at 22: 19 on February 6, 2123, a transportation accident occurred in the transportation gateway of No.15218 working face of Hecaogou No.1 Coal Mine Co., Ltd., Yan 'an City, Shaanxi Province, resulting in 1 deaths. The accident was caused by two employees of the fully mechanized mining team, Bai and Li, placing the hard connecting rod between the battery car and the mine car on the battery car cover and driving the battery locomotive to the 991 meters of the transportation gateway of the 15218 working face. The hard connecting rod was affected by the driving vibration of the battery car. The forward direction of the hard connecting rod was deviated, and it went out of the battery car cover and hit the pipeline hook of the roadway side. The back end hit the head of Li, a car attendant, causing his head injury and died after being rescued.