Abstract: In order to efficiently develop mineral resources and ensure mine infrastructure and pro⁃ duction safety，through the analysis and study of the regional geological structure of Luohe Iron Mine，the morphological characteristics of folds and faults in the strata of the mining area are summarized，and the in⁃ fluence of mine geological structure on engineering geology and hydrogeology is analyzed，so as to provide basis for mining engineering design. The tectonic deformation is mainly Yanshanian orogenic movement. The development time of geological structure is F1 series，F3/F4 series，F2 series and fold from early to late，the basement uplift is later than the basement fault. F1 series faults are the main ore-controlling struc⁃ tures，and other faults and folds are formed later than ore bodies. F2 series fracture is the main water chan⁃ nel. The Z1 and Z2 series folds control the fluctuation of the roof and floor of the ore body and affect the sta⁃ bility of the ore rock. The original fracture of parent rock is beneficial to alteration mineralization.

Key words: geological structure, fracture, fold, underground mining