  A mechanism for the dynamical mass generation of a non-Abelian gauge field
which is based on taking into account the contributions of the gauge field
vacuum configurations into the formation of the physical vacuum is considered.
For a model of the physical vacuum as a superposition of Abelian configurations
the gauge field propagator is calculated in the leading order of
$1/d$-expansion ($d$ is a space-time dimension). One-particle spectrum of the
model corresponds to the gauge sector of SU(2) Georgi-Glashow model.
