  We solve Einstein equations on the brane to derive the exact form of the
braneworld-corrected perturbations in Kerr-Newman singularities, using
Randall-Sundrum and Arkani-Hamed-Dimopoulos-Dvali (ADD) models. It is a
consequence of such models the possibility that Kerr-Newman mini-black holes
can be produced in LHC. We use this approach to derive a normalized correction
for the Schwarzschild Myers-Perry radius of a static $(4+n)$-dimensional
mini-black hole, using more realistic approaches arising from Kerr-Newman
mini-black hole analysis. Besides, we prove that there are four Kerr-Newman
black hole horizons in braneworld scenario we use, although only the outer
horizon is relevant in the physical measurable processes. Parton cross sections
in LHC and Hawking temperature are also investigated as functions of Planck
mass (in the LHC range 1-10 TeV), mini-black hole mass and the number of large
extra dimensions in braneworld large extra-dimensional scenarios. In this case
a more realistic brane effect-corrected formalism can achieve more precisely
the effective extra-dimensional Planck mass and the number of large extra
dimensions -- in Arkani-Hamed-Dimopoulos-Dvali model -- or the size of the
warped extra dimension -- in Randall-Sundrum formalism.
