Photoelastic study of the influence of irregularities in the rock contour of horizontal excavations on the stress state of the contour zone of the rock massif
Abstract
At present, considerable experience of experimental and theoretical studies on stress distribution around excavations of different cross-sectional shape has been accumulated. Most of these studies have been carried out in relation to workings with a smooth contour, however, it is known that the drilling and blasting method of sinking produces an uneven contour of the excavation. Technological irregularities formed in this process, and also occurring in some cases rock dumps, cause redistribution of stresses with the formation of zones of increased concentration. In full-scale conditions it is difficult to determine the value of stress concentration in these zones. Therefore, studies are usually carried out on models.
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