The results of investigation of degradation of KMA ferruginous quartzite samples in strong high-gradient pulsed magnetic fields with magnetic induction up to 1Tl and pulse duration of 240µs are presented. The effect of micro- and macro-cracks formation, electrical resistance drop by 3-4 orders of magnitude and increase of ultrasonic waves absorption in the range from 0.3 to 5 MHz was found. Known effects do not provide an explanation for the obtained results. It is suggested that the magnetokinetic effect of moving magnetite grains in nonmagnetic quartz matrix under the action of a strong high-gradient pulsed magnetic field with the subsequent process of destruction and dickering, accompanied by the development of microcracks at the boundaries of mineral grains.
Currently, only two large deposits of the Turgai ore belt - Sokolovskoye and Sarbaiskoye - are being developed. However, the development of Kacharskoye, Lomonosovskoye, Kurzhunkulskoye and other new deposits is envisaged in the coming years. Due to the similar geological and structural conditions of the deposits of this group, the patterns of changes in the engineering and geological conditions of the development of Sokolovskoye and Sarbaiskoye deposits can be used in the design of new mining enterprises. ...
