This is a strange one but some of you may know something about it.
I've got a bunch of large rocks to split. They are granite boulders in the 500-2500lb range. So far I've been drilling a series of holes in a straight line, fairly quickly, with a Hilti rotary hammer (very sweet tool), then fitting feathers and wedges in each hole, and tapping each wedge with a drilling hammer until the rock splits, very slowly. I've been repeating this with each rock until I get manageable pieces then using these to build a dry stone wall. It's working but very tedious.
Yesterday someone told me just to use black powder in each hole and set the thing off electrically. He didn't elaborate on the specifics but I guess you can buy the black powder anywhere.
#1 Does this sound reasonable?
#2 Can it be done without blowing myself or the neighborhood up? (ie will I have to change my nickname on BT to Missing Fingers)
#3 What's used as the electric spark to ignite the powder?
Any help or advice would be appreciated. Thanks