Dynamic rock pressure manifestations in open-pits
Rybin V.V., Konstantinov K.N., Kalyuzhny A.S.
Mining Institute Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation
Russian Mining Industry №S1 / 2023 р. 56-60
Abstract: Since the 2000s, the Mining Institute of the Kola Science Centre of the Russian Academy of Sciences has been studying the parameters of the rock mass stress-strain state at active open-pits. The studies included the de-stressing method in the end measurements version, the core disking method, the method of recording the geological boreholes deviations and other methods. As the result it was demonstrated that the level of the effective stresses in the rock mass adjacent to the open-pits can be very significant during the deep pit excavations in solid rock masses, reaching values at which rock pressure manifestations can occur. Under the conditions of gravitational-tectonic stress field, the level of effective stresses can be high even at relatively shallow depths. At that, the authors have revealed the tendency for the absolute stress values to increase with the increasing depth. Distribution of stresses was also studied in the immediate vicinity of the open-pit excavation contour. The high horizontal stresses in the rock massif have an ambiguous effect on the slope stability. On the one hand, they create additional load, normal to the faces of the structural blocks, perpendicular to the open-pit contour, which increases the friction force at the contact surfaces of the rock blocks and, as a consequence, enhance the slope stability in general. On the other hand, dynamic rocks destruction can occur due to the forecasted level of the effective stresses at the open-pit bottom, comparable with the strength of uniaxial compression of the rocks composing the pit wall. At the present time, while operating deep open-pits the specialists observe the cases of rock failure under the influence of high stress or disking of cores from research boreholes, which is an evidence of potential manifestations of the dynamic rock pressure in open-pit mining.
Keywords: dynamic rock pressure manifestations, stress-strain state, rocks, open-pit mining, open-pits
For citation: Rybin V.V., Konstantinov K.N., Kalyuzhny A.S. Dynamic rock pressure manifestations in open-pits. Russian Mining Industry. 2023;(1 Suppl.):56–60. https://doi.org/10.30686/1609-9192-2023-S1-56-60
Article info
Received: 19.01.2023
Revised: 01.02.2023
Accepted: 04.02.2023
Information about the authors
Vadim V. Rybin – Dr. Sci. (Eng.), Associate Professor, Chief of Laboratory of Geomonitoring and Slope Stability, Rock Mechanics Department, Mining Institute Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Konstantin N. Konstantinov – Researcher, Laboratory of Geomonitoring and Slope Stability, Rock Mechanics Department, Mining Institute Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation; e-mail: k.konstantinov@ ksc.ru
Anton S. Kalyuzhny – Researcher, Laboratory of Geomonitoring and Slope Stability, Rock Mechanics Department, Mining Institute Kola Science Centre of the Russian Academy of Sciences, Apatity, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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