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ANALYSIS OF STRESS STATE IN SLOPE WALL TO EXPLOITATION IN CETATE QUARRY - ROSIA MONTANA
Abstract
Rosia Montana deposit is made up of several ore bodies; the natural factors are characteristics of each ore body. The deposit is accompanied by an extensive area of hydrothermal alteration, whose distribution has a complex character. Fast alteration and humidity were one of the factors that have been taken into account in order to achieve quarry. The quarry platform has reached at the level of the upper bottoms in the breccia area, which involves passing to the exploitation of the reserves included in these pillars and floors. The integral quarrying of Cetate rock massif from Rosia Montana was made in the conditions of underground existent voids networks under the quarry platforms resulted from the old exploitations. By exploiting progressively the deposit, it reached a situation where the quarry activity would take place directly over the overlapping goals network of underground. Therefore, the security working on the surface is due to the stability of the pillars and floors system of underground. This paper presents analysis mode of stress state that occurs in slope walls in this situation, to ensure the stability of upper floor which is actually the quarry floor but also the equilibrium of whole of resistance structure that support this floor.
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References10
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Glodeanu, E., Study concerning the exploitation in quarry of pillars and floors previously contoured by underground exploitation, E.M. Rosia - Montana, between levels +906 m and +873 m (in Romanian);
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Toderaș, M., Rock characteristics of Cetate quarry perimeter from Rosia Montana. Annals of the University of Petrosani, Mining engineering, Petroșani, vol. 14 (XXXXI), Universitas Publishing House, pag.31-40, Petrosani, ISSN 1454-9174, 2013;
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Todorescu, A., Rock Properties, (in Romanian), Technical Publishing, Bucharest, 1984;
*** Technical and geological documentation from Rosia Montana (in Romanian).
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