Abstract: In view of the problems of complex mine geological structure,frequent override trip of power supply network,low efficiency of equipment relocation,high safety risk and others in Nanling Coal Industry,the study proposes a systematic optimization scheme based on digital technology,big data analysis,and ecological mine theory.Through introducing intelligent zero time limit current protection technology,a three-level optical fiber ring network architecture is constructed to achieve μs level fault positioning and collaborative protection,and solve the difficult problem of override trip;An integrated self moving device for excavation is developed,combined with hysteresis tension sensor and CAN bus control,the equipment relocation time is shortened to 8 min/time;HRB500 anchor rod and ultra-fine cement grouting are adopted to optimize roof support,vibrating string type stress gauge and gas sensor are integrated to construct a safety monitoring network.After implementation,the roof accident rate is decreased from 63% to 18%,the cost per ton of coal is decreased by 9.3 yuan,the annual increase in benefits is 8.37 million yuan,and the internal rate of return is 24.8%,which provides a technical paradigm for safe and efficient mining and sustainable development of mines under complex geological conditions.