Nā noi Hoʻohana nui ʻia nā niho ʻoki lanahu i nā mea hana mīkini i hoʻohana ʻia i nā mina lanahu.Hoʻohana ʻia lākou e ʻoki, wāwahi, a unuhi i ka lanahu me ka maikaʻi.Hoʻopuka maikaʻi kēia mau niho i ka lanahu mai nā moena lanahu, e hoʻomaʻamaʻa i ka hana a me ka lawe ʻana.Hiki i nā niho ʻoki lanahu ke loaʻa nā noi i ke kūkulu ʻana i ka tunnel.Hoʻohana ʻia lākou e ʻoki a wāwahi i nā pōhaku, ka lepo, a me nā mea ʻē aʻe, e kōkua ana i ka ʻeli ʻana a me ke kūkulu ʻana.E like me kā lākou hoʻohana ʻana i ka ʻeli lanahu, cuttin coal...