[watsisname]

when ever it eats a **** tone of meter is compressed into an extremely small space. this produces a region of space with crazy energy densities, (there is probably a bunch of fusion happening making the situation even more energetic) and the energy near the event horizon is therefore absurdly high. the radiation and ejected mater from this region pushes matter that is further away even further away than it already was. until the mater near the event horizon gets eated, then the above situation stops, then the further away mater starts getting pulled in again.

No.  The radiation from around black holes is caused by frictional heating of material spiraling around in the accretion disk.  The gravitational field is extremely strong and compact, and therefore the increase in orbital velocity by moving only slightly closer to the hole is enormous.  This heats material to the point of thermal emission in UV and X-rays before it crosses the event horizon.

[Bobboau]

I had assumed the heating was mostly due to simple compression, but that was hardly the important point of my speculation.

[watsisname]

Sorry, I should have been more clear with what I was quoting and replying to.  Ultimately the heating comes from the conversion of gravitational potential energy, rather than any sort of adiabatic process.  Fusion is also not significant in most accretion disks, though it can happen in some cases.

Your speculation of radiation pressure and/or matter outflow as a means of regulating accretion is good, and is strongly related to what is called the Eddington Limit.  A really cool small-scale example of this phenomenon may be seen with GRS 1915+105.

It is unclear if this explains what is going on presently with NGC 253.