矿井供电系统常采用中性点不接地方式或经消弧线圈接地方式，由于井下环境的特殊性和复杂性，其单相接地故障选线问题一直没有得到很好的解决。分析并比较了2种接地方式的优缺点和系统发生单相接地故障时的选线难点。介绍了矿井供电系统发生单相接地故障时的主动式选线法、被动式选线法（包括基于稳态信息选线法和基于暂态信息选线法）以及智能算法融合选线：主动式选线法主要通过检测注入信号判断故障线路；被动式选线法则基于故障发生后的稳态信息量和暂态信息量完成选线；智能算法融合选线能充分利用故障特征，发展前景广阔。针对目前故障选线方法未进行扰动识别、单一故障选线方法可靠性差、智能算法融合选线优势明显但未能得到很好应用等问题，提出了矿井供电系统故障选线方法的发展趋势。

The mine power supply system usually adopts the neutral point ungrounded mode or the arc suppression coil grounded mode, due to the particularity and complexity of underground environment, the problem of single-phase grounding fault line selection has not been well solved. This paper analyzes and compares the advantages and disadvantages of the two grounding methods and the difficulty of line selection when single-phase grounding fault occurs in the system. This study introduces the active line selection method, passive line selection method (including the line selection method based on steady state information and the line selection method based on transient information) and the intelligent algorithm fusion line selection when the single phase grounding fault occurs in the mine power supply system. The active line selection method mainly detects the fault line by detecting the injected signal. The passive line selection rule is based on the steady state information and transient information after the fault occurs. Intelligent algorithm fusion line selection can make full use of fault characteristics and has a broad development prospect. In view of the problems such as no disturbance identification, poor reliability of single fault line selection method, obvious advantages of intelligent algorithm fusion line selection but not well applied, the development trend of fault line selection method of mine power supply system is proposed.