Abstract:Purpose: The downward open stoping with subsequent backfill mining method, as a new mining technology, is primarily suitable for extracting orebodies with average to extremely poor rock mass quality or in deep high-stress environments. One of the key technologies of this method involves rapidly constructing cutting slots to create free surfaces and compensation spaces for blasting. This study aims to develop a safe and efficient slot construction technology to enhance the mining efficiency of deep, thick, and fractured orebodies. Method: Therefore, this study proposes a construction method of the cutting slots, named "successive well formation + single lateral blasting" . To verify the feasibility of this solution, a field test was conducted at the Sanshandao Gold Mine, combined with numerical simulation and theoretical calculation Result: This study demonstrates that the proposed method can be used to construct cutting slots safely and efficiently when the rock mass in deep mining is unstable and the stope roof is built with cemented backfill. Conclusion: This method not only significantly improves the safety and efficiency of rock blasting but also reduces blasting disturbances, yields good blasting effects, and exhibits strong adaptability, providing an important reference for the construction of the cutting slots in similar mines.