Conventional presplit blasting techniques commonly utilize detonating cords paired with bamboo strips to achieve decoupled charge configurations. However, in certain Chinese regions with stringent civil explosives regulations, procuring detonating cords is challenging, significantly hindering final slope construction timelines and slope stabilization outcomes. To address this issue, this study develops an innovative presplit blasting technique that eliminates dependence on detonating cord, simultaneously addressing material procurement constraints and enhancing operational efficiency, cost-effectiveness, and detonation reliability. The proposed “non-detonating-cord presplitting blasting” technology incorporates two principal innovations: (1) High-precision industrial electronic detonators substitute detonating cords as initiation devices, enabling sequential hole initiation through programmed delay timing that leverages stress waves superposition for controlled fracture propagation; (2) ϕ 60 mm bulk emulsion explosives replace conventional ϕ 32 mm cartridges within an optimized deck charging configuration. Through strategic spacing adjustment of explosive cartridges, blast energy distribution is precisely controlled to ensure effective fracture propagation while maintaining borehole stability. The technology further optimizes critical parameters, including burden and spacing, linear charge density, stemming requirements, and inter-hole delay sequencing. Field validation confirms superior performance over conventional methods, demonstrating over 15 efficiency gains, a 23% reduction in material costs, and 92% labor cost savings, achieved through streamlined operational procedures and precise application of initiation components. Industrial electronic detonators facilitate comprehensive circuit resistance testing, ensuring complete verifiability of the initiation network while substantially improving safety and operational reliability. Post-blast evaluations reveal a slope half-cast factor exceeding 90% and uniformly fractured rock surfaces that meet long-term stability criteria. This research conclusively validates the feasibility and technical advantages of non-detonating-cord presplitting blasting technology using electronic detonators and ϕ 60 mm emulsion explosives in deck-charging configurations. The methodology effectively addresses presplitting challenges during detonating cord supply shortages while delivering simultaneous enhancements in operational efficiency, cost reduction, and safety performance. The solution offers reproducible and adaptable implementation frameworks for open-pit mine slope engineering under similar conditions, indicating significant potential for widespread industrial adoption.