About her on either side were wastes of black, and in the goaf, by way of clearing, but one thing was discernible, the fealty of Adrian.
"Eden" by Edgar Saltus
The nearer we get to the goaf (waste ground), the more likely we are to get crushed.
"The Boy With the U.S. Miners" by Francis Rolt-Wheeler
The parts of the work that we have cleared out and allowed to fall in are called goafs.
"From Sea to Sea" by Rudyard Kipling