期刊
REMOTE SENSING
卷 8, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/rs8110951
关键词
multi-temporal InSAR; small baseline subset (SBAS); deformation monitoring; damage assessment; mining subsidence; Shendong Coalfield; Bu'ertai Mine
类别
资金
- National Natural Science Foundation of China
- Shenhua Coal Industry Group Co., Ltd. [U1261106, U1261206]
- Henan Province University Technological Innovation Team Support Program [13IRTSTHN029]
High-intensity coal mining (large mining height, shallow mining depth, and rapid advancing) frequently causes large-scale ground damage within a short period of time. Understanding mining subsidence under high-intensity mining can provide a basis for mining-induced damage assessment, land remediation in a subsidence area, and ecological reconstruction in vulnerable ecological regions in Western China. In this study, the mining subsidence status of Shendong Coalfield was investigated and analyzed using two-pass differential interferometric synthetic aperture radar (DInSAR) technology based on high-resolution synthetic aperture radar data (RADARSAT-2 precise orbit, multilook fine, 5 m) collected from 20 January 2012 to June 2013. Surface damages in Shendong Coalfield over a period of 504 days under open-pit mining and underground mining were observed. Ground deformation of the high-intensity mining working faces 22201-1/2 in Bu'ertai Mine, Shendong Coalfield was monitored using small baseline subset (SBAS) InSAR technology. (1) DInSAR detected and located 85 ground deformation areas (including ground deformations associated with past-mining activity). The extent of subsidence in Shendong Coalfield presented a progressive increase at an average monthly rate of 13.09 km(2) from the initial 54.98 km(2) to 225.20 km(2), approximately, which accounted for 7% of the total area of Shendong Coalfield; (2) SBAS-InSAR reported that the maximum cumulative subsidence area reached 5.58 km(2) above the working faces 22201-1/2. The advance speed of ground destruction (7.9 m/day) was nearly equal to that of underground mining (8.1 m/day).
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