Abstract: Blasting operations in underground non-coal mine stopes produce toxic gases such as carbon monoxide, nitrogen oxides, and sulfur oxides, posing serious safety risks to personnel. Current gas monitoring in stopes mainly relies on portable gas detectors, which cannot provide real-time online monitoring of toxic gas concentrations in blasting areas after detonation, resulting in monitoring blind spots and potential hazards. To achieve real-time perception of the stope environment and localized linked alarms after blasting, a real-time monitoring and linked alarm system based on edge computing was developed. This paper proposed the overall system architecture, elaborated on the system implementation methods, including toxic gas data acquisition, sensor deployment, online rule compilation, and multi-device linked alarm control, and detailed the technical approaches for each functional module. The system enabled real-time monitoring of toxic gas concentrations in the stope and intelligent judgment at the edge, allowing personnel to keep track of gas risks in real time even when stationed away from hazardous areas. By building a linkage control network centrally dispatched by an edge control host and integrating toxic gas sensors, voice audible-visual alarms, and display terminals, it significantly improved both safety and production efficiency in stope operations. Tests and field applications show that the system operates stably, with a full-chain response time of 1.9 s, the error is 0.3 s, from the moment gas concentration exceeds the threshold until the audible-visual alarm is triggered, thereby achieving online toxic gas monitoring and intelligent linked alarming. The system serves as an important supplement to the existing mine monitoring and control system. It is particularly suitable for scenarios such as the construction phase, in which the mandated "six major safety systems" have not yet been fully established or comprehensively covered and for high-risk working faces where development and blasting operations are frequent. It provides a flexible and reliable technical solution for enhancing the intrinsic safety level of blasting operations in non-coal mines.