BİLDİRİLER

BİLDİRİ DETAY

Mahmut SARI, Selçuk ALEMDAĞ, Mehmet AVCIL
DETERMINATION OF OLD-OPERATED MINE GALLERIES BY ELECTRIC RESISTANCE TOMOGRAPHY (CASE OF STUDY KARAMUSTAFA/GÜMÜŞHANE)
 
Geophysical survey techniques can be successfully applied in near-surface space exploration and cave detection. In this study, the gallery spaces opened in a previously operated mine area were tried to be determined by geophysical techniques. Resistivity information was obtained from a depth of approximately 50 m using the Electrical Resistivity Tomography (EÖT) method, one of the geophysical techniques in the study area. By using the Wenner-Schlumberger array, vertical and lateral separation and hollow structure elements were revealed in the study area. Zones with high resistivity values (>10000 Ohm.m) in the obtained 2D ERT sections were estimated to be gallery voids. The research drillings made to verify these gaps cut the galleries operated at the same depths, revealing the sensitivity of the geophysical method applied. In addition, it is estimated that there is water in the zones where low resistivity values between 30-50m are observed (between 100-200 Ohm.m) in the ERT sections. After that, resistivity in values in the range of 500-5500 Ohm.m indicate limestone units. As a result, the variation and spread of previously operated underground galleries with depth were precisely determined by geophysical survey techniques, and this was confirmed by the exploration drillings in the cavities determined by ERT. ll

Anahtar Kelimeler: Research Drilling, Electrical Resistivity, Gallery, Underground Operation



 


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