The paper is devoted to research on the interaction of artificial soil blends which may be used for soil rehabilitation of mining dumps and soil saprophages (Diplopoda). The mutual influence of mining spoil/rock, chernozem soil and litter of Robinia pseudoacacia L. on Diplopoda biomass and carbon dioxide emission of artificial soil blends has been studied. Mathematical models that describe the dependence of vegetable-eating milliped's biomass and carbon dioxide emission changing upon experimental factors (blends composition) are presented. A significant decrease of body mass of the millipeds inhabiting mining gobs, and an increase in response to the addition of Robinia pseudoacacia L. leaf litter to the soil blend, were found. Experiments testified that biological activity of soil blends increases in the presence of invertebrate saprophages. The experimental results show that this will help enhance the quality of the overall soil media and so reduce the potential polluting effects from surface run-off from mining spoil and reduce erosion risks.