RE:RE:RE:RE:RE:Impending saleblock caving is the standard for deep deposits such as ours. it is not necessary for surface deposits as coffee appears to be. scooping off the surface is cheapest but short mine life. all mining effects the environment, but copper is good for environment. cost-benfit analysis. block caving is relatively cheap and environmentally friendly, but requires initial costs. go for it . i believe we r mother lode for whole system. main plate striking sub plate perpendicularly. cu and au.