ngā pereki me ngā pūtahi
Nō te whakamahi i ngā rautaki herehere (DTH - Down-the-Hole) me ngā paiaka, he mea nui tēnei i ngā mahi herehere o nāianei, e whakapakiti ana i ngā hanganga pūnaha me ngā momo hangarau matatika. E rua ngā take matua o ēnei taputapu: te paiaka DTH, e whakaputa ana i te kaha pakoko, me te paiaka herehere, e takoto ana i runga i te whenua. Mō te tūnga iho, ka whakamahi i te hāwai whakatipu hei whakatū ake i te pihinga, ka pakoko anō ki runga i te paiaka, e whai ana i te kaha whakaaro me te kaha pakoko. Ko tēnei kīanga rua e whakamana ana i te whakawehenga pūmau ki ngā momo whenua e rite ana, mai i ngā rākau matehore ki ngā whenua tahuri tahuri. Nō ngā paiaka DTH o nāianei, ko ngā tohu karahipi mōhiohia e whakatakoto nei i waenganui hei whakapai i te wehewehe whakakaha, ā, hei whakapai hoki i te whakatupu wehi. Ko ngā paiaka e whakauru ana i ngā pūnaha hāwai matataki, e whakamahi ana i te kaha hāwai mō te mahi herehere, ā, e āwhina ana i te whakatere i ngā kereka mai i roto i te rua. Kua hangaia ēnei taputapu hei whakatutuki i te mahi i waenganui i ngā pūtahi, mai i te ao rangi ki ngā ranga e rima tekau atu, me whakaaweawe atu i a rātou i ngā whakamahi pērā i te whakatū wai, te whakamahi kōhatu, te hanga, me ngā mahi pukuririki. Ko te hanga he ara hei whakatikatika i te wehewehe o ngā kereka herehere me te turetu o te wā moe, hei whakamana i te mahi i waenganui i ngā taiao whakahē.
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