Abstract: The Ashele Copper Mine is gradually approaching a depth of 1 000 m, with deep ore fragmentation and increased stope stress, resulting in increasing stability problems in the stope.In order to ensure the stability of the deep stope of the Ashele Copper Mine and ensure the safety of the recovery operation, it is necessary to optimize the structural parameters of the stope based on the engineering geological data.Through on-site research, the uniaxial compressive strength of typical underground ore is obtained, the ground stress of the middle section of -100 m is measured, and the rock mass classification is carried out on the underground ore, and then the Mathews diagram method is used to analyze the stability of the top plate and the side gang for the directional layout and vertical direction layout of the stope, and the rock stress coefficient, joint azimuth coefficient and gravity adjustment coefficient are reasonably selected based on the engineering geological data, and the correlation between the Mathews stability coefficient and the allowable hydraulic radius is obtained.The final analysis determined the optimal structural parameters to keep the stope stable when the stope width is less than 24 m, the stope roof is always stable.The length of the stope must be less than 22.5 m when the vertical ore body of the stope is arranged and the side ore is pyrite, and the length of the stope must be less than 12.5 m if the side gang is tuff.The relevant conclusions can provide a basis for the optimization of the structural parameters of the Ashele Copper Mine, and can provide a reference for the structural design of similar mines in China.