Mining is increasingly relying on wireless communication for a diverse set of functions in the mine. As additional wireless devices and systems are added to the mining cycle, they must continue to function acceptably in the presence of the other wireless devices and systems currently in use. This paper presents a case study to illustrate the importance of testing for wireless coexistence in the mining sector. A commercial wireless Emergency Stop (E-Stop) system is evaluated for wireless coexistence with another technology commonly found in mines: IEEE 802.11 WLAN. Two hypothetical E-Stop application use cases are presented. Functional wireless performance and key performance indicators are defined, and testing is performed. Analyses of the results are shown as they pertain to each application use case. The results indicate that unintended signals can impact the wireless performance of the E-Stop system devices in certain circumstances. The conclusion is that evaluating and understanding wireless coexistence performance can lead to safer and more reliable wireless system deployments on or around safety-critical mining equipment. © 2024 IEEE.