Predicting the Stress-Strain State of the Fractured Rock Massif on the Example of Interchamber Pillars
Vladislav Trifonov1, Ivan Emelyanov2, Viachslav Sinegubov3

1Vladislav Trifonov*, OOO Geotechnicheskoe Buro, St. Petersburg, Russia.
2Ivan Emelyanov, OOO Geotechnicheskoe Buro, St.Petersburg, Russia.
3Viachslav Sinegubov, OOO Geotechnicheskoe Buro, St.Petersburg, Russia.
Manuscript received on November 16, 2019. | Revised Manuscript received on 26 November, 2019. | Manuscript published on December 10, 2019. | PP: 4228-4233 | Volume-9 Issue-2, December 2019. | Retrieval Number: B7648129219/2019©BEIESP | DOI: 10.35940/ijitee.B7648.129219
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Abstract: The article describes the finding of the qualitative differences in the formation of the stress-strain state of a disturbed rock massif on the example of interchamber pillars with various methods of accounting for the structural disturbance and different spatial geometry of the cracks. Three numerical models are created with different methods of accounting for the disturbances in the massif continuity: in the first model, the strength of the massif is described by the Hoek and Brown criterion; the second and the third models are rock massifs for which violations in the continuity are formed explicitly, using ready-made templates of the systems of cracks presented in the Phase2 software product. The results obtained for the different models illustrate the inaccuracies occurring in assessing the disturbance of rock massif using score criteria. Models with underrated strength properties of the rock inaccurately describe the real mechanisms of the fractured massif: the qualitative description is not consistent with the results of field observations and geological surveys of rocks in general. 
Keywords: Interchamber Pillar, Stress-Strain State, Rock Massif, Fracturing, Continuity Breach, Crack.
Scope of the Article: Rock Mechanics and Mining Sciences