Abstract: The article analyzes the management of the technological process of underground mixing in a non-homogeneous environment and the development of a computer model of the process of underground mixing in a layered system environment to support decision making. A mathematical model of the management of the underground mixing process in the conditions of a layered system of development has been developed; the dynamics of the reagent concentration and pressure value at different values of the parameters affecting the technological process of underground mixing in the conditions of the layered system of development were studied; a computer model was developed to conduct numerical experiments and visualize the results in two- and three-dimensional graphics; a software package of the underground mixing process was developed to support technological decision-making in the management of the development of mineral deposits in the conditions of a stratified system of development. The developed computational algorithms and computer model can be used in decision-making, analysis and forecasting of parameters of the underground mixing process in order to optimally obtain minerals from real deposits developed in the stratified system of underground mixing.