掘採 is read as くっさい (kussai) and means mining.
くっさい
kussai
さいくつ
mining
さいくつば
mining site
さいくつけん
mining rights
さいくつしゃ
miner
ほる
(for two men) to have anal sex
ほりだしもの
(lucky) find
ほりさげる
to dig down
ほりだす
to dig out
ほりあてる
to strike (gold, oil, etc.)
ほりおこす
to dig up
ほりかえす
to rake up (e.g. old scandal)
ほったてごや
house built directly into the ground with no supporting stones