原锦州铁路分局管内除沈山、秦沈线外,其他8条线路均采用半自动闭塞,传输通道一直沿用传统的电通道(长途明线或电缆)。许多铁路线光电双缆或明线同用,存在许多不足之处,已不能适应现代化铁路运输发展的需要,应尽快进行改造。1半自动闭塞工作过程半自动闭塞是由甲站(发车站)值班 The original Jinzhou Railway Branch Pipeline except Shen Mountain, Qin Shen Line, the other eight lines are semi-automatic occlusion, the transmission channel has been using the traditional electric channel (long-distance light or cable). There are many shortcomings in many railway lines with double cables or wires, which have not met the needs of the development of modern railway transportation and should be rebuilt as soon as possible. A semi-automatic blocking process semi-automatic occlusion is a station (departure station) on duty