Based on the shortcomings of traditional sand box simulation anchor rod pull-out test,a model test similar material preparation scheme for simulating soft rock anchoring performance was developed based on similarity theory.The main materials used were air dried soil,cement,water,and soil solidifying agent.Existing proportioning test results showed that satisfactory similar materials for simulating soft rock can be obtained by adjusting the proportion of different additives.The two selected soil materials in the experiment can simulate similar materials for soft rock with compressive strength of 0.2～2.0 MPa and elastic modulus of 7～160 MPa,which have mechanical performance requirements for soft rock.This indicates that this similar material is an ideal soft rock simulation similar material and has low cost and easy model preparation characteristics.
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