Isbn: 9787030681539 - 深部煤层充填开采覆岩运移控制技术理论与实践博士后文库 王方田 (1 risultati)

paperback. Condizione: New. Paperback. Pub Date: 2021-03-01 Pages: 189 Language: Chinese Publisher: Science Press. Filling mining is an effective technical way to ensure the safety of deep coal seam mining. increase resource recovery rate and protect the ecological environment.?Deep Coal Seam Filling and Mining Overlying Strata Movement Control Technology Theory and Practice aims at the bottleneck problem of the overlying rock movement control technology for ultra-high water filling mining in deep coal seams. Based on t.…