125 © 2020 Copyright held by the author(s). Published by AIJR Publisher in “Abstracts of The Second Eurasian RISK-2020 Conference and Symposium” April 12- 19, 2020, Tbilisi, Georgia. Jointly organized by AMIR Technical Services LLC, Georgian Technical University, Institute of Geography (Kazakhstan) and Russian Institute of Petroleum Geology and Geophysics. DOI: 10.21467/abstracts.93 Interdisciplinary Risk Research: Remote Sensing, Radar Altimetry, GIS, etc Integration of the Electrical Resistivity Tomography and Seismic Refraction Survey Data to Identify the Structure of Oxidized Waterlogged Zones of the Mine Tailings (Western Siberia, Russia) Sofiya Grakhova, Petr Dergach, Nikolay Yurkevich, Dmitry Kucher IPGG SB RAS, 630090, Novosibirsk, Russia doi: https://doi.org/10.21467/abstracts.93.69 ABSTRACT Introduction. The current situation of mine wastes, ore dressing tailings, and slag from the metallurgical industry in direct access to oxidizing and transporting factors has radically changed the environmental conditions in mining regions, not only in Russia but also throughout the world. Water transport of potentially toxic elements from dumps is gaining momentum over time due to the destruction of the tailings mineral matrix and the transition of elements to mobile forms. The formation of highly mineralized solutions inside the body of dumps and the direction of their subsequent migration in the external environment are issues without which it is impossible to develop protective measures against the harmful effects of acidic drainage water [1]. To assess damage and monitor such objects, it is necessary to develop methods for continuous monitoring and testing. For several years we carried out electrotomography and geochemical studies on the Ur dump, and in 2019 the seismic tomography technique was tested. Study object located in the Barit village, Kemerovo region, it was formed in the 1930s. (Fig. 1). It is composed of barite-pyrite granularity from the oxidized zone of the Novo-Ursk deposit pyrite after gold extraction by cyanidation. The total iron content (in terms of Fe2O3) is 15%, sulfur (in terms of SO3) is 10%. A natural stream flows near its foot, becoming after a dump an acidic sulphate highly mineralizedsolutionwith pH 2.1, specific conductivity 3.9 mS/cm and high concentrations of metals and metalloids [2]. Methods. The electrical resistivity tomography (ERT) and Seismic refraction survey were carried out at the Ur dump in 2019. ERT was carried out by the multi-electrode electrical resistivity and induced polarization imaging instruments «SibER-48»(LLC«KB Electrometry», Novosibirsk) in cloudless weather with a slight wind. A single braid was used in the profile, the step between the electrodes was 5 m, the total length of the profile was 120 m, so the most informative depth is 5-10 m. Seismic observations were carried out along a 180-meter linear section with a distance of 1 m between adjacent geophones. Excitation was carried out using a sledgehammer on a metal plate with a step of 5 m. Figure 1. The layout of the Ur dump relative to the Ursk village.