EARTH SCIENCES. General and regional geology
Chernysh O.
OLGA G. CHERNYSH, Candidate of Geological Sciences, Associate Professor, Department of Life Safetyin Emergencies and Environmental Protection, School of Engineering, Far Eastern Federal University. Vladivostok. 8 Sukhanova St., Vladivostok, Russia, 690950, e-mail: xanfia@yandex.ru
The assessment of strained massif state aimed to improve mining safety
The trouble geodynamic situation in a number of mines of the North Uralian Bauxite Basin that manifests itself in frequent rock bumps in the zones of tectonic disturbances necessitated structural tectonophysic investigations in a number of excavations and natural exposures. Various deformations of the massif enabled one to reconstruct the parameters of tectonic stresses that had occurred. The method of kinematic analysis of fractured tensile structure elaborated by O.I. Gushchenko and refined by V.A. Korchemagin was used for that. As basic parameters of tectonic movements the method has the pointing vectors of shifts and the spatialisation of shear fractures. It makes it possible to make use of the entire of faults and relaxed surfaces caused by displacements to reconstruct the parameters of stressed fields. As a result, compression stresses have been found to take place in the massif, whose magnitude considerably exceeds a theoretical value calculated for the corresponding depth without regard for tectonic forces. The orientation of maximal compression stresses is sublatitudinal that is perpendicular to the strike of the Ural structures. The minimal compression has been registered along the strike of the structures.
Key words: strain elements, stress fields, kinematic analysis, dynamic effects, fault zone.
REFERENCES
1. Baybatsha A.B. Models of nonferrous metals deposits. Almaty, Ministry of education and science of Republic of Kazakhstan, KazNTU. 448 p. (in Russ.).
2. Beseda A.P., Dudnik V.A., Korchemagin V.A., Pavlov I.O. Features of paleotectonic stress fields in outburst-hazardous zones of Donetsk–Makeevka and Central regions of Donbas. Proceedings of the Donetsk National Technical University. Mining Geology Series, 125, p. 19–23. (in Russ.).
3. Ermakov N.I. Causes of mining shock origin on ore deposits (on NUBR example). Mining information-analitical newsletter. 2001;8:218-228. (in Russ.).
4. Sim L.A. Overview of the state of knowledge on paleotectonic stresses and their implications for solution of geological problems. Geodynamics&Tectonophysics. 2013(4);3:341-361. (in Russ.). doi:10.5800/GT-2013-4-3-0105. URL: http://gt.crust.irk.ru/images/upload/tblarticle114/magazin114.pdf
5. Sim L.A. Some methodological aspects of tectonic stress reconstruction based on geological indicators. Comptes Rendus Geoscience. 2012(3–4):174-180. URL: http://dx.doi.org/10.1016/j.crte.2011.11.003.
