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pro vyhledávání: '"Wenhua HAO"'
Publikováno v:
Meitan xuebao, Vol 49, Iss 3, Pp 1332-1344 (2024)
Coal pillars in soft and thick coal seam are often tall and have large exposed coal walls, and the coal quality is soft with some developed cracks, which can easily cause an instability of coal pillars and make roadway maintenance difficult. This pap
Externí odkaz:
https://doaj.org/article/0d8805ad090440799ed635f71b5971cf
