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A network survivability analysis model of Mine Ethernet Passive Optical Network (M-EPON) system in the mine communication was proposed, the topologies of dual-bus and dual ring-shaped network were presented. Also, the network survivability of the traditional tree-shaped and above proposed two different topologies of M-EPON systems was studied respectively. Simulation results show that the survivability of proposed structure is better than that of the traditional tree-shaped structure, and the dual-bus and dual ring-shaped network structure are further to enhance robustness and availability of M-EPON system.

Simulating characteristics of human intelligent, a new intelligent controller was produced: human-simulation logical predictive controller (HLPC). This controller can utilize the advantage both in logical controller based on pan-boolean algebra and model-based predictive controller. It is a multi-logic hybrid dynamic system. Simulated results based on Matlab prove that HLPC shows good performance when predictive model matches and satisfactory results when model mismatches, represents better robustness and small overshoot . Compared with other artificial intelligent controller, HLPC has simple structure, clearly physics background and mathematical concepts, thus would make it easy for industrial application.

Stringing haulage motors were main underground conveyance equipments, but they were the strong electromagnetic interference sources. To resolve the problem of monitor system false alarm and mobile communication interruption, the interference generation mechanism and distribution characteristic were analyzed. The means of conducted interference circuit analysis and stray current quantitative analysis were adopted. The radiated interference of the stringing haulage motor was measured with Protek3201 field-intensity meter at the second mine of Pingdingshan coal Co. Ltd. The conducted interference, stray current and radiated interference were the main factors of gas monitor and mobile communication malfunction. The anti-interference measures were taken, which included the power supply isolation, equipotential earth and shield to radiated interference. Results indicate monitor system false alarm and mobile communication interruption have been eliminated completely. It is concluded that the electromagnetic compatibility of underground gas monitor and mobile communication has been enhanced evidently with these anti- interference measures.