This basalt rocks exploration define the following necessary rock melt parameters and the quality of the fibre obtained with the stated properties: chemical and mineralogical composition of rocks, melt homogenization temperature, dependence of viscosity of the composition on temperature, working temperature of the melt during CBF production, melt holding time, melt level during CBF production, die temperature, melt flow rate per die, pulling speed per fibre diameter, determination of fibre diameters, fibre thermal stability, fibre chemical resistance, and other characteristics of basalt rocks of gabbro and andesite basalt compositions.