Estimation of Radio Attenuation Constants for Underground Mine Communication Systems Using Radio Wave Propagation Simulation

Abstract

This study aims to validate the estimation of radio wave attenuation constants in underground mine communication systems using propagation simulation. Unlike open-pit mines, underground mines necessitate stringent safety measures to protect workers in the event of mechanical failures or rock falls. Early detection and warnings of potential hazards are crucial for safety, prompting the implementation of monitoring systems. Wireless communication is increasingly favored for its ability to simplify the complex installation of these systems in underground environments. However, designing an effective communication system must account for factors such as radio wave attenuation and the influence of physical obstacles. Simulations can estimate the required number and locations of wireless communication devices, aiding in system design. In this study, RSSI (Received Signal Strength Indicator) values at the Osarizawa mine were calculated using Wireless InSite software and were compared to measured values, showing an error of 4.41 dB. The radio wave attenuation constant was determined to be 4.90 ×10− 2 dB/m.