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A scheme is put forward in this paper of master-slave PLC control network based on distributive control model for fulfilling the vast control scope and adapting to the sordid conditions in coal mine signaling centralized and locking system. The implementation of controlling hardware is well discussed. The software is analyzed as well, primarily consisting of supervision program and communication programs...
According to characteristics of coal mine goaf, a suitable routing mechanism based on LEACH protocol was proposed. The mechanism's improvement including two sides: Firstly, LEACH cluster heads selection mechanism was improved. Secondly a routing algorithm of wireless sensor network was designed with the multi-path routing mechanism. Finally, the NS2 simulation result show that this new routing mechanism...
Through the analysis of major fatal accidents occurring in China's coal mines, it showed that human errors account up to 96.5% for total causes. Therefore, in order to prevent the miners' unsafe behavior and accidents analyze the factors of unsafe behaviors with the object study of G mine's N1301 face's miners, and determine a factors' set which consists of 4 first-level factors and 16 second-level...
The primary goal of this research is to solve these problems such as low efficiency, human errors and unenlightened mode for social insurance fund management in coal mine currently. It gives three-layer B/S system structure and three key modules including information publication and management, social insurance fund management, system management on the basis of requirements analysis, general design...
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