Gong-kuang zidonghua (Mar 2014)
Proposal of revision for monitoring, communication and video surveillance of Coal Mine Safety Regulatio
Abstract
The paper put forward the revision of Coal Mine Safety Regulation should add content of mine mobile communication, broadcast communication, video surveillance, personnel positioning, coal production monitoring, monitoring of mine fire, mine pressure, hydrological monitoring and remote monitoring and so on. It presented that mine monitoring system sharing channel with video surveillance system is forbidden, the cable of dispatching communication system should be dedicated devices of the system, the trunk network should adopt mine Ethernet optical network with volume of gigabit or gigabit above which has function of redundancy, and mine mobile devices and wireless access should be preferred WiFi, ZigBee, 4G technologies. It put forward the core optical fiber and cable for coal mine safety monitoring system and dispatching communication system should be set up separately from different wellbores or different locations of a shaft into the underground, the optical fiber and cable should be provided with protection measures, and the optical fiber and cable should be buried under roadway floor crossover with laneway's side at the pit without serious floor heave. It put forward coal mine safety monitoring system should be equipped with functions of main ventilator monitoring, gas extraction monitoring, real-time on-line monitoring both for the breathing dust density and total dust concentration, air direction monitoring, and analysis of gas change rate, alarm of coal and gas outburst. It also presented that methane sensor for highly gassy and coal (rock) and gas outburst mines should be full range of high-low concentration which preference is given to laser or infrared methane sensor; methane detection equipment such as carrier catalytic element of methane sensor and portable methane detection alarming device should be calibrated regularly with standard gas and air sample, and the calibration is needed at least once every 15 days; methane overrun power cut function test is needed at least once every 15 days; mining face at the highly gassy and coal (rock) and gas outburst mines should setup methane sensor in upper corner which gas concentration for overrun alarm limit is 1.0% CH4, gas concentration for power cut limit is 1.5% CH4, and gas concentration for power regain limit is 1.0% CH4.
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