基于遥感技术的乌达煤田火区变化监测

Change monitoring in Wuda coalfield fire area based on remote sensing

采用遥感反演、自然间隔点分割与空间叠加分析等技术手段,提取1989、2001、2005年的乌达煤田火区范围,分析煤田火区的空间分布格局、空间演变态势、变化速度与变化趋势。研究结果表明:1989—2005年乌达煤田火区面积增加了98.10万m2,每年新增约6.13万m2,年增加率为2.48%,乌达煤田南部的A(12、13与14号)火区面积在逐渐减少,其他火区的面积在逐渐增加,并向四周扩散蔓延形成新的燃烧带。

The methods of remote sensing,natural break and spatial overlay were adopted to extract coal fire area of 1989,2001,2005,in Wuda coalfield,Inner Mongolia.Coal fire spatial distribution,change speed and extend direction were analyzed.The results show that 981.0 thousand square meters coal fire zones were discovered with 61.3 thousand square meters and 2.48% increasing rate average year.Coal fire zones Nos.12,13 and 14 in south part of Wuda decrease gradually.However,other coal fire zones increase and extend around.Some new coal fire burning belts are formed.