  Recently, a generalised solution for Einstein equations of a rotating compact
body, surrounded by matter field was proposed, which is the Kerr-Newman
spacetime with an anisotropic matter. The solution possesses an additional
hair, along with the conventional mass, charge and spin, which arises from the
negative radial pressure of the anisotropic matter. In this article we show
that, this new class of black holes can act as a particle accelerator during
the collision of two generic particles in its gravitational field in the
ergo-region. The centre of mass energy of the particles shoots to arbitrary
high value in the vicinity of event horizon for the extremal black hole. The
physical conditions for the collision to take place are obtained by studying
the horizon structure and circular particle motion. The results are interesting
from astrophysical perspective.
