crater and block caving

... awhile ago a chap posted (mw03) and said that crater would have to be block cave mined,due to depth, rainfall and terrain. I just googled,being unaware of the process...amazing.There is a site called block caving process animation,which is 3d animation,and accompanied by some lousy music..i suggest you eyeball if you are interested in what goa may do.Apparently it's expensive initially,but very cost effective in process..cheers all. PS..i can wait till tues..and mw,if your reading,hope you post soon