When the competent strata is not within reach of ordinary roof bolts or does not exist, rockbolts can still be applied to bind thin and weak individual layers together to form a “beam”. The internal rockbolts through the weak layers can provide direct shear resistance to the horizontal movement that occurs between the rock beds and can also increase the friction between the layers by applied normal force perpendicular to the bedding plane (Luo, 1998). Figure opposite explains the fundamental function of rockbolts used for the beam building.