Author(s): |
Xuren Wu, College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China Mengsheng Lu, College of Environment & Spatial Information, CUMT, Xu zhou 221008, China.;Shan dong Provincial Research Institute of Coal Geology Planning and Exploration, Taian 271000,China shiyan Fan, Shan dong Provincial Research Institute of Coal Geology Planning and Exploration, Taian 271000,China |