Removing a boulder

I'm trying to remove a boulder from my basement. The house was built around it (who knows why), and the boulder is about 7 feet long X 5 feet wide X 4 feet high and slightly irregularly shaped.

My thought was to drill holes into the boulder, pour in an expanding material to crack the boulder, and then jackhammer it into smaller pieces so that I can carry them out.

Issues:
the boulder is wider at the top than the bottom,
the boulder is only about 3 feet from a post holding up the house
the boulder sits on slightly sloping ground

My big worry is that in trying to break up the boulder, its centre of mass might change, and it might shift or roll into the post. There's no way the post can be removed, so I need to somehow brace the boulder.

I was thinking I could build up support around the bottom of the boulder before starting the process, but this could be quite a bit of work in itself.

Any other ideas?

 

Because of the cost of removal and re-compaction.

Using S-mite in a confined area can be hazardous. It would be safer, and less costly, to rent a hydraulic splitter (basically a power assited plug & feathers). Try United Rentals http://www.ur.com/

Wetted sacks of concrete, sand bags, 9 Gauge chain link fabric, and steel form stakes, or rebar, to keep it together. Stake the bags, chain link over the mass, and strategically stake around the permeiter.