Zobrazeno 1 - 1
of 1
pro vyhledávání: '"Jiankang Man"'
Publikováno v:
Mining Science and Technology (China). 21:573-579
As the excavation of roadway, new fractures will be formed and the pre-existing fractures extend with the redistribution of stress in surrounding rocks. Eventually, fracture zone and bed separation are formed in rocks because of the developed fractur