Sentence:  About one-half the body has been mined by <WSD>underhanding</WSD> into mill holes; but with the adoption of the water drill, shrinkage stoping is being largely used and the larger stopes are mined as at Levack. 
Meaning of the word marked with <WSD> tags:  To excavate downward in successive steps or horizontal slices while positioned above on unbroken ore.