Submitted by admin on Thu, 01/18/2018 - 16:26 c_cosidx: 260c_moddate: 2010-01-19 14:40:20c_orderno: 6c_weekno: 6course: Rock Mechanicstopics_long: Failure theory: Tresca, Mohr-Coulomb, Hoek-Brown , Griffith, etc.