How is the classification of rocks classified?
Layered rock, good cementation3 hard lump rock, fissure closure without mud filling, Rb>60 MPax09 conglomerate, sandstone, limestone and other well cementationx09 hard rock in medium stable x091., Rb = 20~40 MPa
Layered rock layer, cementation, no soft rock x09 basalt, quartzite, quartz sandstone, limestone and Ordovician Maokou limestonex09 stable rock x091. is relatively hard, Rb = 40~60 MPa
Quality solutionExamples of classification of x09 x09 rock formationsClass x09 name x09x09x09 strong stable rock x091. hard, integrity, integrity, strong, not easy to weathering, Rb>60 MPa
