Investigation of coal mining subsidence area using remote sensing images in Weihuliang, Xinjiang
Du Xishihui1,2,3, Zhou Kefa1,2, Wang Jinlin1,2, Zhou Shuguang1,2,3, YU Hao4, Sun Weidong4
1. Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Ürümqi 830011;
2. Xinjiang Key Laboratory of Mineral Resources and Digital Geology Ürümqi 830011;
3. University of Chinese Academy of Sciences, Beijing 100049;
4. Information Center of Bureau of Geology and Mineral Resources of Xinjiang, Ürümqi 830000
The mining history of Weihuliang coal mine is more than 50 years. The long-term underground mining had caused serious surface subsidence. This study took coal mining subsidence area of Xinjiang Weihuliang as the research area to extract the subsidence area information by using the high resolution IKONOS remote sensing images and ArcGIS software package. Furthermore, according to field verification, geological hazards which had been caused by the subsidence were analyzed. The results showed that the number of ground fissures with large scale located in the tensile zone and collapse pits distributed in subsidence troughs were 64 and 94 respectively. Meanwhile, the area of backfillings was up to 0.92 km2 in 2013. Besides, three new collapse pits have been found in the backfilling. The study ilustrated that the remote sensing technology charactered by macroscopic and rapid features is an cost-effective way to investigate actual situation of the subsidence hazards.