A Simplified Approach to Estimate Anchoring Capacity of Blocky Rock Mass with Pressure Arch Theory

Abstract In this paper, a simplified method for predicting rock mass resistance against tensile forces from anchors (anchor) is presented. The interaction of and was investigated using three-dimensional discontinuous numerical modelling. Several patterns discontinuities were assumed in the modelling while single anchor embedded it. results show that existence discontinuity set sub-parallel to significantly improves force anchors. This phenomenon due block interlocking at set. Rock generates zone stress concentration inside which has an arch shape (i.e., pressure arch), resisting anchor's force. load-bearing capacity plays significant role anchor. A voussoir beam analogy utilised study arch. analytical approach developed assess beams. Then, it used combination with weight mobilised by maximum anchoring (anchoring capacity). suggested calibrated relevant published pull-out test results. technique paper shows significance size, shear behaviour discontinuities, Young's modulus mass, uniaxial compressive strength intact masses.