Defining the values of stress and strain around development workings
Stability of reusable development workings depends on the size and nature of the stress distribution in the marginal massif. One of the measures to ensure the stability of workings may be the marginal unloading of the massif. Unloading of the massif is done by creating a zone of low voltage from the current lava in the marginal massif. The zone of low voltage is created under the blasting impact in the area of marginal zone of the working. For the conditions under consideration there has been simulation performed of the deformation of marginal massif taking into account the characteristics of rocks, location of development workings, protection of the workings by support and unloading of the marginal massif.