Mechanism research and application on distributed optical fibre temperature measurement in coalmine goaf area based on the sensor network

摘要

The coal spontaneous combustion disasters exist in nearly 60% of coal mines of China. Among them, the goaf spontaneous combustion accounts for a large proportion. Optical fibre, as a new temperature-measuring device, has been more and more widely used in the coal seam spontaneous combustion fire prevention and control work. The paper, based on optical fibre online monitoring mechanism research, designs the overall temperature measurement system, carries out the field test and processes the test data by software to get more intuitive reaction of temperature changes in the goaf area. The experimental results show that compared with the return airway, the start value and maximum values of temperature in intake airflow roadway are not the same, but the oxidation and heat accumulation zone and the temperature rising range are roughly the same and the calefactive interzone is 100 similar to 170 m.