Assessment of Change in Rock Mass Permeability in the Vicinity of Underground Explosion from Experimental Data and Numerical Modeling

The plane and axially symmetric 2D numerical modeling of rock mass blasting is carried out using the Lagrangian tensor-based method. The results are compared with the actual direct measurements of rock mass permeability in the near zone of underground nuclear explosion Dnepr-1 in Khibiny in 1972. The post-explosion permeability of hard rocks is assessable at an admissible accuracy using the calculated shear strain intensity. A case-study of rock mass permeability change assessment in the near zone of blasting of a complex configuration charge is discussed.