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分析了郑州矿区三对矿井井下泵房或变电所破坏的原因，提出了修复技术方案，并详细介绍了三种技术的支护方法及支护机理。
The reasons for the damage to the three underground pumping stations or substations in Zhengzhou mining area are analyzed, the technical solutions for the restoration are put forward, and the support methods and supporting mechanisms of the three technologies are introduced in detail.