2024-03-29T15:43:45Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/622502019-06-24T04:00:00Zhdl_2115_20045hdl_2115_139Roof Fall Accidents during Rainy Season in Underground Coal Mines in MalawiYasidu, Umali MuhammadManeya, G.Fujii, YoshiakiFukuda, DaisukeKodama, Jun-ichiMalawiCoial mineRoof fallRainy season560資源・素材学会北海道支部Conference Paperapplication/pdfhttp://hdl.handle.net/2115/62250https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/62250/1/MMIJ-H%2c2016%2c47-48.pdfProc. MMIJ Spring Meeting201647482016-06-18engauthor