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DEFINING CONDITION OF PRESSURE AROUND THE UNDERGROUND OPENING TRAPEZOIDAL IN SHAPE, SUBSTRUCTURED BY ANCHORS IN MULTILAYERED DEPOSITS INVESTIGATED BY THE METHOD OF FINAL ELEMENTS

By
Semir Fejzić ,
Semir Fejzić

BCC Tuzla Canton, Tuzla, Bosnia and Herzegovina

Jovo Miljanović ,
Jovo Miljanović

Faculty of Mining, Prijedor, University of Banja Luka, Banja Luka, Bosnia and Herzegovina

Edin Fazlić
Edin Fazlić

PC Elektroprivreda ZD Mines “Kreka Tuzla Ltd, Tuzla, Bosnia and Herzegovina

Abstract

The computer program ADINA is used for the pressure analysis on the model of the underground opening, trapezoidal in shape in layers of lignite. An analysis was made before, during and after the setting of three and five anchors. The theory about pressure distribution for secondary and tertiary pressure condition in the roof and board sides of the opening by setting anchors has been proven. In order to check the result, test of pulling out anchors from the roof of the opening has been done. The examinations and research conducted at the level of obtained results show the efficiency of setting underground opening by using anchors where there are multilayered deposits of lignite. The results of the research provided in this paper can also be used for underground openings in different shapes in multilayered deposits.

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