作者: Ashok Jaiswal , B.K. Shrivastva
DOI: 10.1016/J.IJRMMS.2008.11.003
关键词:
摘要: … It is almost similar to the Bieniawski formula where in-situ coal strength could be correlated with strength of 1 in 3 coal specimen: (19) Pillar strength ( MPa ) = σ c 0.66 2.39 [ 0.36 ( w / h ) …