The paper presents the results of express research using the natural pulses of the Earth’s electromagnetic field in the Solotvyno salt anticline structure in the Transcarpathia to assess the current stress-strain state of rock mass, to determine local heterogeneities and development of dangerous geological processes forecast. Measurements were made at 410 monitoring points located on 14 profiles. The obtained results were recounted in the complex signal, the values of which vary from 49.25 to 2297.68. In order to assess the variability of the complex signal, its gradients were calculated. Within the mine field of the mine № 9 and along the structure’s north wing the maximum value of the integrated signal and its gradients were established, indicating the maximum mass stress state of these areas. In the region of the southwest periclinal of the structure in the Zaton area the minimum values and gradients were established. Completed research complex allowed to predict the development of deformations of the salt rock mass along the peripheral zones of the mine fields and beyond the forecast subsidence area, including the southern slopes of Mount Mahura with the risk of landslide deformations activation.

Full Text

1. Kuzmenko Ye.D., Bagrii S.M., 2011. About the suitability of karst research within potash and rock salt deposits using electric methods, Geodynamics, vol. 2 (11), pp. 134-137. (In Ukrainian).
2. Kuzmenko Ye.D., Bagrii S.M., Shtogrin N.V., 2003. To the problem of salt karst mapping in the Transcarpathia region, Scientific Bulletin of the National Mining Academy, vol. 6., pp. 82-87. (In Russian).
3. Methodological recommendations for rocks stress condition study using the technique of Natural Pulse Electromagnetic Field of the Earth (NPEMFE), 1991, 27 p. (In Russian).
4. Petrashkevych M.Y., Lozyniak P.Yu., 1983. Report. Scientific substantiation of oil and gas exploration directions in the Transcarpathian through, UkrDHRI fonds, 79 p. (In Ukrainian).
5. Pikarenia D.S., Orlinskaia O.V., 2009. The technique of natural pulse electromagnetic field of the Earth (NPEMFE) applying experience for solving engineering geological and geological problems, 120 p. (In Russian).
6. Salomatin V.N., Zhilenko O.B., 2006. Overview of the application areas of the geophysical express method NPEMFE, Construction and industrial safety, vol. 15-16, pp. 213-216. (In Russian).
7. Salomatin M.V., Shkitsa L.Ye., 2003. Mechanical and electric transformations in solids with defective structure and possibilities of its application for geoecological problems solution, Scientific Bulletin of the Ivano-Frankivsk National Oil and Gas Technical University, vol. 1 (5), pp. 77-80. (In Ukrainian).
8. Selyanchin M.I., 1995. Report. Additional exploration deep horizons of mine №8 Solotvyno rock salt deposit in 1992- 1995, Geoinform of Ukraine, inv. № 55852, vol. 1, 328 p. (In Ukrainian).
9. Tumanov V.V., Savchenko A.V., Bogak M.Yu., Shurkhovetskyi S.A., 2007. Minefields geodynamic structure evaluation using geophysical methods, Scientific works of the UkrNDMI NAS of Ukraine, vol. 1, pp. 115-127. (In Russian).
10. Cheban V.D., 2001. The technique of natural pulse electromagnetic field of the Earth. Application aspects, Geophysical Journal, vol. 23, №4, pp. 112-121. (In Ukrainian).
11. Shekhunova S.B., Aleksieienkova M.V., Stadnichenko S.M., Siumar N.P., 2015. The integrated geological model of Solotvyno structure as a tool to assess geological sustainability of Solotvyno rocksalt deposit, Collection of Scientific Works of the Institute of Geological Sciences NAS of Ukraine, vol. 8, pp. 233-250. (In Ukrainian).
12. Shupikov A.R., Sabov Yu.V., Vasilev I.N., Tasсhi V.M., 1970. Report. Additional exploration in 1967-1970 of Solotvyno rock salt deposit (Transcarpathian region), Geoinform of Ukraine, inv. № 32263, vol. 1, 120 p. (In Russian).