By an overview of the grounding system of several power supplies, a grounding system is selected for the coal supply. The measures should be taken to the various types of ground make more detailed descriptions and analysis. The electrical protection of mine power supply and grounding methods are made appropriate recommendations.%通过对几种供电接地系统的概括介绍,筛选出适合作为煤矿供电接地系统,并对其所应采取的各类接地措施作了较为详尽的说明与分析,对煤矿供电应采取的电气保护与接地方法提出了适当的建议.
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