  We study the production of Mueller-Navelet jets at 13 TeV LHC, within
collinear factorization and including the BFKL resummation of energy logarithms
in the next-to-leading approximation. We calculate several azimuthal
correlations for different values of the rapidity separation $Y$ between the
two jets and evaluate the effect of excluding those events where, for a given
$Y$, one of the two jets is produced in the central region.
