Prediction of the stress state of the shotcreting support under repeated seismic load

The article assesses the impact of repeated blasts on stress-strain state shotcreting support, which negatively affects bearing capacity support and can lead to formation local rock falls in places significant degradation strength. Despite fact that a single seismic load usually does not have technical condition dynamic loading development negative processes affect safety. considers unreinforced dispersed-reinforced concrete as support. Models deformation been studied. To describe model mass, an elastic–plastic based Hook-Brown plasticity has accepted, accurately describes elastic-plastic behavior fractured medium. When performing prediction plastic with accumulation Concrete Damage Plasticity (CDP) was adopted, allows comprehensively consider process both under conditions uniaxial compression stress, minor edging draft. At first calculation stage, forecast waves propagation immediate vicinity explosive initiation site made. second forecasts mine working were On basis performed studies, methodology for assessing is proposed.