Purpose. The articles aims to substantiate the nature of injecting liquid concentrate with the help of quantitative evaluation of both capacity and crossflow parameters of water-bearing formation involving geomechanical changes occurring in a rock mass. Methodology. Numerical modeling of hydrodynamical and hydrochemical processes with repressive component under boundary conditions involving the model identification on the physical and dynamical analogy as well as solving filtration and crossflow problems; carrying out analytical study concerning conditions of vertical hydraulic fracturing of reservoir bed. Findings. Both filtration and capacity parameters of water-bearing formation as well as crossflow parameters of low permeable separating formations have been substantiated. Changes in hydrodynamic and hydrochemical nature of underground water of reservoir bed and productive water-bearing formations under the conditions of injecting liquid concentrate and further relaxation of hydrodynamic repression in time and space have been evaluated. Geomechanical processes within the nearfield area have been taken into consideration by means of simulation selection of penetration parameters according to losses and injection pressure involving pulsation character of hydraulic fracturing of reservoir bed fissures. Originality. For the first time ever mathematical model for liquid concentrate injection into water-bearing filtration with contiguous water extraction and pulsatory hydraulic fracturing character of the concentrate suction has been developed. Practical value. Recommendations concerning a technically feasible and environmentally friendly operation mode of reservoir bed of liquid concentrate have been developed and implemented. Capacity reserves of reservoir bed have been evaluated according to a predictive category.

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