Abstract: A physical model for the footwall slope of the Nanfen open-pit mine, China is established using a self-developed deep geological engineering disaster model test system.Model scale NPR anchor cables are installed inside the model to carry out deep mechanical monitoring.The digital speckle technique is used to monitor displacement of the slope model.From an experimental point of view, the variation law of shear strength parameters of weak structural plane and the mechanical support characteristics of NPR anchor cable under the condition of large landslide deformation and failure are examined.Results of this model test show that slope failure has four distinct stages:soil compaction stage, crack generation stage, crack propagation stage, sliding surface penetration stage.During slope failure, the NPR anchor cable experiences large deformation but incurs no damage, indicating that the NPR anchor cable can be continuously monitored and reinforced during deformation and failure of the landslide.The stress characteristics of NPR anchor cables during the test are consistent with the monitoring results of the Newtonian force at the landslide site, which proves that NPR anchor cable is effective and reasonable in landslide monitoring and early warning.