Abstract: In coal seam mining, the overlying strata are subjected to structural damage, forming a three-zone configuration comprising the caved zone, water-conducting fracture zone, and bending subsidence zone. The water-conducting fracture zone, acting as a hydraulic channel between the goaf and aquifers, may trigger roof water inrush or mine water leakage when its height exceeds the impermeable key stratum or extends into aquifers. Existing prediction methods for fracture zone height primarily rely on empirical formulas or static monitoring, which suffer from low spatial resolution and insufficient dynamic monitoring capabilities, thus failing to meet the high-precision detection requirements for the three-dimensional dynamic evolution of mining-induced fractures. To achieve full-space dynamic monitoring of fracture zone development, a borehole resistivity dynamic monitoring method is developed by integrating parallel electrical data acquisition, three-dimensional full-space resistivity inversion, and time-lapse resistivity imaging, based on the general failure patterns of overlying strata. This method employs borehole-deployed electrode arrays to capture the electric field response of the strata, reconstructs subsurface resistivity structures through three-dimensional inversion, and dynamically tracks the evolution of the water-conducting fracture zone by analyzing spatiotemporal resistivity variations via time-lapse imaging. In the engineering practice at the 1302N working face of Changcheng Fifth Mine, the proposed method is applied to monitor the development of the water-conducting fracture zone. Multi-phase resistivity inversion profiles reveal a dynamic evolution characterized by “initial expansion, accelerated development, and stable formation” with the final fracture zone height determined as 58 m. The consistency between this result and water injection observation data confirms the reliability of the dynamic monitoring approach. The methodology demonstrates strong engineering applicability and scientific robustness in detecting mining-induced fracture development. It not only provides reliable technical support for water hazard prevention in Changcheng Fifth Mine and adjacent mining areas but also enhances both practical value and economic benefits in coal mine safety management.