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对于煤矿生产而言，其供电质量和稳定性都直接对煤矿的生产效率造成影响。本文首先对于煤矿井下变电所存在的问题进行了简要分析，之后以 SGZB-07A 保护器为例，介绍了新一代高压配电综合保护器的保护原理，总结了一些煤矿变电所高压配电装置的改造技术要点。经过相关技术改造，不仅提高了配电装置系统运行效率，同时也为煤矿井下供电系统创造了一个安全稳定的生产环境，提高了经济效益。“,”with the continuous development and progress of China’s economy and society, the demand for coal is increasing, which puts forward new requirements for coal mining. Coal mine water prevention and control work is an important part of coal mining, which is of great significance for the safety of coal mining. The detailed and complete hydrogeological data is the basis to ensure the smooth development of coal mine water prevention and control work. However, there are still some deficiencies in the water prevention and control work in China, and coal mine accidents still occur from time to time. Starting from the importance of hydrogeological work, this paper discusses the shortcomings existing in the current hydrogeological survey in China, and further puts forward countermeasures and suggestions to solve them.