Originally Posted by vehve
Al, slightly less dramatic: The neighbor just brought me his drill, I'm going to just split those with set of what my web dictionary wants to call "plug and feathers". But basically, drill holes into the rocks, drive metal wedges into the holes, give TLC with a sledgehammer, and then you should have smaller rocks.
Being a former bluestone quarrymen, seventh generation, I'm quite familiar with plugs and feathers. Not used in regular natural cleft quarries, but rock quarries where they take out big chunks and saw them into slabs and either polish or flame thermal them to make them look natural. We would drill six foot holes in a row put in the plugs and feathers and beat them down the line until it popped. A lot of $ per cubic foot, but it eats a bed up quick. Prefer natural cleft quarries.
They don't use plug and feathers any more, either computer operated track diamond studded chainsaws or wire saws. And dynamite,and dynashear I think they call it, more of a controlled bang. Back when my grandfather was cutting stone everyone had dynamite and blackpowder for taking off rough streaks in a quarry, cheaper and easier then ancient bulldozers. Now days you can't even buy fertilizer in quantity without being investigated, Lol!