TY JOUR TI Modern geophysical research of salt mines KW Potash mine KW water-protective layer KW seismic-electrical and gravity exploration KW geomechanical forecast KW mine shaft KW interchamber pillar JO Vestnik AGGE AU Sanfirov, I.A. AU Yaroslavtsev, A.G. AU Stepanov, Y.I. AU Bychkov, S.G. PY 2025 IS 0 PB Association of Geologists, Geophysicists and Engineers