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Abstract The penetration resistivity of the homogeneous，layered and massive surrounding rocks anchored by crossing cable are researched by model tests based on the theory of similarity. The experimental results show that the type of (homogeneous，layered and massive) surrounding rock has little influence on the penetration depth. The higher quality of rock mass，the less increasing quantity of penetration resistivity. The largest penetration depth of the massive model rock，the least penetration depth of layered surrounding rock. In this article，the basic reasons which lead the penetration depth smaller between reinforced and unreinforced model rocks are analyzed；and the first condition to improve the penetration resistivity of model rocks is to improve the compression capacity of model rocks. The simulated rock mass containing lower rate of cable，though it can improve the simulation materials tensile strength，it fails to improve the bomb penetration ability of simulation rock mass. The results of the model tests are also simulated by LS-DYNA. The numerical simulation is in good agreement with the experimental results. The numerical simulations show that the change of angle and the space of anchors which influence on the penetration depth of rocks is small. Although the crossing cable fails to improve anti-bomb penetration of the simulated rock mass，the increase of the tensile strength and shearing capacity for material of rock mass can obviously reduce the deformation of the underground structure，conducive to the stability of the underground structure.
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Received: 12 April 2012
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2012, Vol. 31 
