ISO13584 (PLIB) is an international standard, which is established to realize computer's identification ofdata expression and data exchange of part library.
This paper studies the effect of ground stress, pore gas pressure and adsorbed methane on methane transport in coal seam, and researches into the applicability
Observations from the field and the laboratory show that en echelon fractures within fracturc zones have a Riedel within Riedel structure. The tcnsile failure m