  We study the phenomenology of TeV-scale black holes predicted in theories
with large extra dimensions, under the further assumption that they are
absolutely stable. Our goal is to present an exhaustive analysis of safety of
the proposed 100 TeV collider, as it was done in the case of the LHC. We
consider the theories with different number of extra dimensions and identify
those for which a possible accretion to macroscopic size would have timescales
shorter than the lifetime of the Solar system. We calculate the cross sections
of the black hole production at the proposed 100 TeV collider, the fraction of
the black holes trapped inside the Earth and the resulting rate of capture
inside the Earth via an improved method. We study the astrophysical
consequences of stable micro black holes existence, in particular its influence
on the stability of white dwarfs and neutron stars. We obtain constraints for
the previously unexplored range of higher-dimensional Planck mass values.
Several astrophysical scenarios of the micro black hole production, which were
not considered before, are taken into account. Finally, using the astrophysical
constraints we consider the implications for future 100 TeV terrestrial
experiments. We exclude the possibility of the charged stable micro black holes
production.
