Handbook of Rock Excavation Methods and Cost is a rare book, try finding any modern book on hand mining techniques and prepare for frustration.
This PDF is of an old text from the late 1800’s which is the height of men digging mine shafts by hand.
I have a strong belief, based on the geology of my location, that there is a cave near my property, now I know there is no opening on my land, but I also plan on digging into my hill for a small pistol range and possibly an earth sheltered greenhouse. If I find a sinkhole or small opening I want to be prepared to open it up, so I went out of my way to find information like the PDF I am sharing here.[pdf-embedder url=”https://www.tngun.com/wp-content/uploads/Handbook-of-Rock-Excavation-Methods-and-Cost.pdf” title=”Handbook of Rock Excavation Methods and Cost”]