New Data on the Geological Structure of the Meghri HPP Hydrotechnical Tunnel Route Territory (Based on Geophysical Investigations)

Enviromental technologies

  • S. S. Manukyan Yerevan State University
  • H. A. Igityan Institute of Geologicak Sciences
  • R. A. Karamyan Yerevan State University
  • R. S. Minasyan Institue of Geophysics and Engineering Seismology
Keywords: Meghri HPP, hydrotechnical tunnel, geophysical methods, geological survey.

Abstract

The article considers the results of complex geophysical studies performed in the south of the republic due to the planned construction of the Meghri HPP with the Iranian side. The main task was to obtain the necessary data for selecting the optimal route for the underground supply hydrotechnical tunnel. The accuracyand informativity of the geophysical investigations are important for such adifficult area, which is located near the Meghri pluton. The Meghri pluton is one of the main reasons in this area, that influencesthe structure of the rocks. The, about 18 km long, hydrotechnical tunnel, which is for transmitting water from thewater collecting dam to HPP, should avoid deep faults, fractured zones and underground water basins. The depth of its passage, depending on the surface, varies on average from 100 to 400 m. The necessary data on the thicknesses and depths ofintrusive andmodern sedimentary rocks and the presence of tectonic faults are obtained. These data will be used to select the direction of the optimal tunnel route. It is proposed to implement geophysical works in the remaining not-studied segments of the designed hydrotechnical tunnel, which will make the drilling – geological and geotechnical field works more effective

Author Biographies

S. S. Manukyan, Yerevan State University

Manukyan Sargis Sos
PhD student

H. A. Igityan, Institute of Geologicak Sciences

Igityan Hayk Albert

Cand. of Geol. sci.

R. A. Karamyan, Yerevan State University

Karamyan Raffi Ara
Cand. of Geol. sci., Deputy Director of Centre for Work with Students

R. S. Minasyan, Institue of Geophysics and Engineering Seismology

Minasyan Robert Sarbek

Dr. of Geol. sci., SR, Institute of Geophysics and Engineering Seismology after A. Nazarov

Published
2017-07-06