Abstract: Internet of Things (IoT) is very suitable for remote real-time monitoring on coal mine,however its reliability needs to be further studied and improved.Based on the characteristics of coal mine,such as long and narrow tunnel and severe interference,a 3D uniform IoT sensor deployment method which is suitable for the major hazards monitoring is proposed.Furthermore,the related mechanisms to improve the topological reliability of IoT are studied on the basis of accurate monitoring data,such as the distance redundancy between nodes and the unequal redundancy of cluster head.At the same time,several relevant parameters are quantitatively analyzed.From the view of theoretical analysis and simulation results,the method have characteristics of high coverage,balanced energy consumption,and flexible scalability,which have significant effect on improving the topological reliability of coal mine major hazards remote monitoring with IoT.

Key words: Internet of Things, Coal mine, Monitoring, Topology, Reliability, Optimization