A Study on the Propagation Trend of Underground Coal Fires Based on Night-Time Thermal Infrared Remote Sensing Technology

Underground coal fires in fields endanger the mine surface ecological environment, resources, threaten safety and workers’ health, cause geological disasters. The study of methods by which to monitor laws that determine way underground spread is helpful safe production smooth execution fire extinguishing projects. Based on night-time ASTER thermal infrared images 2002, 2003, 2005 2007 Huangbaici Wuhushan mining areas Wuda coalfield, an adaptive-edge-threshold algorithm was used extract time-series for areas. A method dynamic analysis geometric centers proposed propagation law development trend fires. results indicate that, due effective prevention external influences solar irradiance, topographic relief land cover, identification accuracy via use a image higher 7.70%, 13.19% 14.51% than daytime Landsat terms producer accuracy, user overall respectively. direction center can be represent There exists linear regression relationship between migration distance variable-area adjacent years, with correlation coefficient reaching 0.705, indicates area intensity variation This applied trends under both natural conditions human intervention. experimental show southeast increased 0.71 km2 during period 2002–2003. From 2003 2005, Wuda’s northwest conditions, decreased 0.30 closure some small mines. 2007, activities, east, south, west north, dramatically 1.76 km2.