  Let $(X,\mathscr{B}, \mu,T,d)$ be a measure-preserving dynamical system with
exponentially mixing property, and let $\mu$ be an Ahlfors $s$-regular
probability measure. The dynamical covering problem concerns the set $E(x)$ of
points which are covered by the orbits of $x\in X$ infinitely many times. We
prove that the Hausdorff dimension of the intersection of $E(x)$ and any
regular fractal $G$ equals $\dim_{\rm H}G+\alpha-s$, where $\alpha=\dim_{\rm
H}E(x)$ $\mu$--a.e. Moreover, we obtain the packing dimension of $E(x)\cap G$
and an estimate for $\dim_{\rm H}(E(x)\cap G)$ for any analytic set $G$.
