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Nowadays, there are many underground working areas, such as mines and tunnels, which are considered with the scope of the hazardous working area. The use of wireless sensor network (WSN) technologies to ensure the safety of the workers as well as the efficient use of the resources in these areas provides great benefits. Our study aims to design a safe system with the help of WSN technologies developed for disaster cases. The proposed architecture using the IEEE 802.15.6 standard on each worker consists of several wireless sensor nodes for sensing temperature, air-flow, humidity, dust, gas concentration, and etc., and a coordinator that manages all these nodes. The performance of the proposed architecture is evaluated using the Riverbed Modeler simulation program in terms of throughput, end-to-end delay, and energy consumption metrics. The analysis shows that the IEEE 802.15.6 standard creates a …