ABSTRACT
The results of the experiments performed on two-dimensional models demonstrate that the governing factor affecting the value of the ultimate pullout force is the horizontal compression of the models simulating natural stresses in the rock mass. The disregard of this factor in the analytical relationships derived in the USSR and elsewhere may lead to a significant underestimation of the design ultimate force required for an anchor embedment pullout. This conclusion is valid providing the rock around the cone is sound enough.
