摘要
为了研究乌达煤矿煤火特征的分布及变化,采用3种不同的遥感反演温度算法(单窗算法、单通道算法、Artis算法),并通过阈值分割法提取2005年的乌达煤田火区温度,与叠加的实测煤火矢量图进行对比分析。结果表明,提取的温度异常区域与直接采用星上亮度温度图提取区域基本相同,其中Artis算法重叠度最低,单窗算法和单通道算法重叠度相同,而直接用星上亮度温度重叠度最高。通过比对分析该地区的地表覆盖类型和数字高程模型(DEM),发现乌达煤矿出现的北部高温异常和中部低温异常与地表覆盖类型和地形变化相关,在南部受干扰较小的区域与实测区重叠度达60%以上。选择该地区11号煤火区为研究区域,对比2005—2012年的煤火时空变化,结果表明2005—2010年的煤火温度异常的范围表现为波动的变化,2010年后的煤火范围缩小,煤火得到一定控制,未发生明显反复。
In order to analyze the changes and distribution of coal fire in wuda area, three different remote sensing tem- perature retrieval algorithms such as Single-window algorithm, Single-channel algorithm and Artis algorithm were ap- plied, it was extracted coal fire temperature of Wuda coal field with mutli-threshold density slice method in 2005 and compared with the vector diagram of the field work. But it was obtained the similar overlapping with the at-sensor brightness temperature. The Artis algorithm obtained the lowest results. Single-window algorithm and Single-channel al- gorithm has the same coverage. However, it should be the best choice for the direct application of the at-sensor bright- ness temperature, where it obtained the same overlapping. Analyzed the distribution of land cover and Digital Elevation Model（DEM） in Wuda, it show that the high temperature abnormality in North and the low temperature abnormality were related with the land cover and topographic change in Wuda coal field. It was the 60% overlapping in the less in- terference of north area. Finally, taking the 11 th coal fire area as the studying example and comparing the temporal and spatial variation from 2005 to 2012, it was conclusion that the coal fire temperature anomaly area was fluctuation from 2005 to 2010, and the range of coal fire reduced after 2010 because the coal fire was controlled and not increased.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2014年第A01期105-111,共7页
Journal of China Coal Society
基金
国家自然科学基金资助项目(41101423)
中国博士后科学基金资助项目(2011M500128
2012T50499)
关键词
数字高程模型(DEM)
温度反演
乌达煤田火区
遥感
digital elevation model（DEM）
temperature retrieval
Wuda coal fire area
remote sensing
