Breaking rock in a surface coal mine

There is a growing concern, as fossil fuels are recovered from the ground, that the cost of the energy required to extract and process them ...

Early coal mining machines and their use

This is part of a series of Tech Talks that I write on Sundays. It is meant to provide some background information on the extraction of fos...

Other methods of breaking rock

I thought that this week we would expand the horizon of these talks a little, and talk about the general philosophy of breaking rock, since ...