New technologies and new equipments of coal mine monitoring

The paper analyzed the national coal production，the total number of accidents, the death rate per million tons and the changes of serious accidents. On average per year, the coal production had increased by 194 million tons, the number of accidents had decreased by 337, the death number of personnel had decreased by 551 and the death rate per million tons had decreased by 0.310.It proposed that mine-used thermal catalytic methane sensor should be used in low gas mine and high gas mine, mine-used laser methane sensor should be used in coal (rock) and gas outburst mine; mine-used wireless sensor should be used in the upper corner of working face, on heading face, in high risk location and on mining equipment and transportation equipment, and the mine-used wireless sensor should use wireless power transmission to supply power; mine-used gas telemetering sensor should be used for gas detection in inconvenient place for people to reach such as area of harmful gas advanced detection by the rescue team, the area of goaf and high risk roof; the automatic zero set of sensor should be used in portable gas detector and wireless sensor. It also put forward axial layout method and serpentine layout method for monitoring fire accident in goaf of mine-used distributed fiber temperature measurement system; the mine-used distributed fiber temperature measurement system should be used to monitor fire accident of underground coal mine belt, cable and electrical equipment. Meanwhile, it proposed that automatic coal mining should use memory coal cut mode based on coal mining model and remote control method, energy saving control of belt conveyor should use laser belt scale and mine power supply system should use fiber longitudinal differential protection and fiber interlock and comprehensive anti override trip system.