## 4 Conclusions  
1. The shrinkage method is one of the earliest and most widely used mining methods in underground mining in China, with the advantages of a simple structure, convenient management, small development engineering, easy to master process, and easy to acquire the required equipment. However, its disadvantages cannot be ignored, including high ore loss and dilution rate, high manual labor intensity, low production efficiency, difficulty in tailings disposal, safety hazards in void areas, and financial losses and safety hazards from centralized dumping of ores.
2. Compared with the shrinkage method, the backfilling method shows significant advantages in ore recovery. It has a larger daily production capacity and a lower loss and dilution rate. At the same time, the filling method can also bring significant economic benefits. More importantly, the filling operation not only ensures the safety of the operators in the ore recovery process, but also effectively eliminates the potential threat of goat collapse to surface personnel and buildings. In addition, the backfilling method also helps to relieve the storage pressure of tailings on the surface.
3. Suichang Gold Mine has experienced many years of ore recovery by the shrinkage method, and is now facing many problems. Through the transformation from the shrinkage method to the filling method, the safety of workers' operation is guaranteed, the trouble of full loads in tailings ponds is alleviated, and the safety of a large number of residential areas on the surface and the national mining park is ensured. Both technical and economic indicators have improved. Taking the test quarry of +180 m to +260 m in the middle section of the V-1 orebody of Suichang Gold Mine as an example, the total revenue increased by 18,151,000 RMB.
4. In conclusion, due to the shortcomings of the mining shrinkage method, it is difficult to meet the country's requirements for high-quality development of the mining industry and the development needs of enterprises themselves. However, due to the advantages of the backfill method, the backfill method has become a better choice than the shrinkage method.  
In conclusion, the authors state that this paper only serves as a guide to start the conversation. In future research, the authors will continue to study the transformation of mining methods in domestic mines, and hope that more experts and researchers will be interested and become involved in this area of research.  
Conceptualization, S.L.; Resources, S.L.; Writing-original draft preparation, L.Y.; Writing-review and editing, L.Y.; Visualization, T.Y. and Z.D.; Supervision, Z.D.; Project management, S.L. and J.C.; Funding acquisition, S.L.; Management, S.L. All authors have read and agreed to the published version of the manuscript.  
The authors appreciate the financial support from the Science and Technology Innovation Program of Hunan Province (Grant No. 2023 RC3035) and the Natural Science Foundation of Hunan Province (Grant No. 2021J40745).  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
The authors declare no conflicts of interest.