2024-03-29T06:13:54Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/379732019-03-18T09:34:55Zhdl_2115_37368hdl_2115_37318hdl_2115_139Acoustic Emission Activity in Bed Rock Surrounding Underground Working Faces in Deeplevel Coal SeamsWatanabe, YoshiteruNakajima, Iwao500Hokkaido UniversityDepartmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/37973https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/37973/1/15%281%29_1-18.pdf0368-9379AA00732467Memoirs of the Faculty of Engineering, Hokkaido University1511181979-01engpublisher