ABSTRACT
The mechanism of quasi-plastic joint formation and operation, on our opinion, is presented by following (Figure 2). During the bending of rock layer
of the zone I with thickness Im1 its neutral axe NX moves towards to the activity of compression
stresses Ix by the reason of objectively excess of rock deformation modulus on compression and modulus of deformation on tension. On a site 20 Y
stresses Ix are absent as a result of fracture forma-
tion; on a site 10 Y compression stresses I x , dis-
tributed according to the law, closing to linear (Pysarenko 1979) along coordinate Y , with maximum
operate. On the contact of rock layer in vertical di-
rocks of the zone II. Using well-known for rocks, the Coulomb-Moor theory of strength (Ruppeneit
© 2012 Taylor & Francis Group, London, ISBN 978-0-415-66174-4
where Icom – limitation of rock compressive
strength of the first rock layer of the zone I; I – internal friction angle of rocks.
