Distances and time analysis of particles movement in the vicinity of rotating black holes

In the paper the distance from the event horizon of a specific black holes (with masses, corresponding to the range from stellar to supermassive) to some point in the accretion disk, on which Euclidean geometry can be applied, is analyzed.In the general case it was found that the differences between the applied and Euclidean metrics are insignif- icant at distances of gravitational radius order from the event horizon. It should be noted, that in the vicinity of rotating black holes the curvature of space-time is smaller than in area of static black holes.Also the particles movement from a point in the vicinity of the event horizon, where BSW resonance exists, to the point in the accretion disk is considered. The estimated amount of time, as it turned out, takes areasonable value For instance, the time for supermassive black hole, with the mass of eight solar masses, is 125 hours, while for the stellar one - fraction of a second (0.013 s).