Pūtahi DTH: Tauira Whakamua mō te Weheweheanga me te Pūmau i te Mahi

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Te take DTH (Down-the-Hole) he whakamahinga nui i te hanganga o te hunga whawhai, e taka ana i te huarahi pai ki te mahi me te hanganga matataki. Ko tenei take whawhai e whai ake nei he pū kiko e mahi ana i te taha raro o te rua, tuatahitia ki muri i te take whawhai. E whakamahi ana te rākau i te ānihoni whakatōmuri hei whakapiki i te pū toenga, ka tukua e ia ngā puhipuhi whakarereke ki te take. Ko tenei take whakamutunga o te waea e tiakina nei te pai rawa o te whawhai, inaianei i runga i ngā whenua kiko nui. Kei roto i te take DTH ngā whakatakoto herehere tungsten carbide hei whakangungu i ngā take whenua, ahakoa i te wā e whai ake nei i te whakangungu pai i te wā e hirikiri ana. Ko tana hanga e whiwhi ai i ngā ratonga pai, ahakoa i te iti o ngā wehewehe ki te raro i ngā rua roa, koinei te nui rawa mai i te nohoanga i ngā kaupapa kuhu, porowhita, me ngā kaupapa hanga. Kei roto i te hunga anō ngā take whakaiti kohu me ngā take whakapai herehere e pai ana ki te whakakore i ngā kereka i roto i te wāe whawhai, ka whakamana i te pai tonu o te mahi. Ka noho ngā rākau DTH o nehe i ngā take tata ki te ao e whakamahia nei i te tirohanga tūroa i ngā paerewa whawhai, ka whakaae atu ki ngā kaiwhakahaere kia whakapai i te mahi me te whakahē i te whakapae take.

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Kei te whakamahia te rārangi DTH tēnei he nui atu ngā pūtake pai ake e whai ake nei i te whenua o ngā mahi whawhai. Tuatahi, kei te tuku mai tēnei i te kaha me te huanga pai rawa atu, ēngari i roto i ngā wāhanga kō whatitiri, koinei te wā e kore ai ngā momo whakawhiti take matua e paunga ana. Ko te mīhini whakawehe take i te takoto tonu ka tiakina te mate take, ka puta ake he waenganui pai rawa atu i te waenganui o te hanga me te itinga o ngā moni mahi. Ko te hanga o te rārangi ka tukuna he pai rawa atu ki te tika o te poaka, he mea nui tēnei mo ngā whakamahi e hiahiatia ana te tika o ngā poaka. Ka mutu, ka whiwhi ngā whakamahi i te itinga motu i runga i te whakangungu take pai, ka puta ake he utu whakaiti noa iho i te wā. Ko te whakapae pai o te hanga ka taea te tirohanga whakatere, ka tiakina te hunga whakarereka me te wā kaukau. Ko te whakangungu pai o te rārangi ka taea te tirotiro haumaru i ngā take whakamahi, ka tiakina te pūnaha o ngā take whakarereka me ngā wā kaukau. Ko te whaimiromiro o te rārangi DTH ka taea te mahi i roto i ngā wāhanga whenua rerekē, mai i te mataku ki ngā whatitiri whakahirahira, ka noho whakaae kē te hiahia mo ngā take whakapono maha. Ko te hanga whakawaehae o te rārangi ka whakaeaea te mahi me ngā whakatikatika whakarereka, ka tiakina ngā huarahi whakangungu me te whakaaetanga mahi. Ahakoa, ko ngā tohu haumaru i roto i te hanga ka tiakina ngā take me ngā kaiwhakawehi, ahakoa te itinga o ngā whiuwhiu ka whakangungu i te wā pai o ngā kaiwhakawehi i roto i ngā wā whakawhiti take whakahoutanga. Ko te whakarite o te rārangi ki ngā take whakawhiti take matua ka taea te whakauru pai ki ngā mahi katoa, ka tiakina te whakaaetanga o ngā whakautu.

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Tauira Pūoro Matatini

Tauira Pūoro Matatini

Te whakamahinga o te hangarau pūkana matua a te DTH i te tāwāhi whakatō kōmihana. Ka whakamahi te rākau i tētahi mīhini whakahāngurea hāpori e tukuna ana pūkanga tika, nui ki te tahataha o te papa whenu. Ko tēnei tikiwhakaaro āhua o te waihanga e tirotiro nei i te itinga o te kaha i waenganui i ngā rākau top-hammer, ka hua ko te tūponotanga pai rawa o te tāwāhi. Kei roto i te hangarau nei ngā māramatanga pūnaha wawe hei whakapai i te whakawehenga kaha, e whai mana ai ki te whakamahi i te katoa o te kaha. Ko te whanonga pūkana matua i tana tikanga mōhio e āheinga ana i te taunga pūkanga hāpori ki runga i te momo whenu, e whakamana ana i te kaiwhakatutuki i ngā āhuatanga pūtaiao e rerekē ana. Ko tēnei take whakatipu e whakapai ana hoki i te tāwāhi me te whakapai i te oranga o ngā rautaki e takoto ana i te ara i whakakorehia ai te mate me te pūtake.
Rapu Whakariterite Debris Matua

Rapu Whakariterite Debris Matua

Kei te whakamahere tonu te rākau whakarite āpōpō ki roto i te pūtake DTH hei tūpono hou mo te whanonga matatini o te kōpuke me te roanga o te rakau. Hei whakaatu, kei te rākau ka noho ngā ara whaiwhai e hanga nei i ngā patapata huringa ā-haere pai rawa, e tango ana i ngā kaihanga kōpuke i roto i te wāhi pakoti. Ko tēnei hanganga mōhio ka tohua i te korenga o te whakaritorito anō me te whakaae kia whai ake tonu te kōpuke. Kei roto i te rākau tētahi whakahaere ā-pūnaha e tiakina ana i te paunga nui whakawhitiwhiti haere i runga i te mahi kōpuke, e whakakore ana i te kuhu mai o te mamae, me te itinga i te mate o te pūtake. Ko te wehewehe pai o ngā kaihanga e whakaaetanga ana i te kōpuke matatini i waenganui i ngā poari whero, e iti ana i te mate o te kuhu whenua rānei ko te mate o te rakau. Ka whiwhi anō hoki tēnei rākau i te pai o te hanga whakamana i te pai o ngā taupae i roto i ngā mahi kōpuke whakamātau.
Te Tirohanga me te Whakahaere Mōhio

Te Tirohanga me te Whakahaere Mōhio

Kei te whakaputa ngā whiu o te kaihanga me te rūnau a te pūtake DTH i te wāhi matua o te hangarau tupeka. Ko tēnei raraunga mōhio ki te whakamahi i ngā tohu mōhio hou e whakamana ana i ngā whakahoa tahuhu i rā anō, hei whakaatu i ngā painga nui o te whakatupu, ā, inā he iti pea te taenga mai o te wā, ka kitea he wāhanga hoki i te hā o te rākau, me te werawera o te pūtake. Ka whakaae te rūnau whakahaere i ngā whakahaere whakatupu i runga i te wā, kia whai mana rawa ai, ahakoa kāore i whai mana ngā wharewhare. Hei tirohanga mōhio hoki tēnei hangarau, ka whakamohio i ngā kaiwhakahaere i ngā take e taea ana ki te whakaeke ki te nuinga, ka whakaiti i ngā wā kore whakaaro me ngā utu whakatika. Kei te whakamana hoki ngā huatau raraunga o tēnei rūnau, hei whakamohio i ngā whakahaere pai, me te whakapai i ngā whakahaere whakatupu mo ngā take whenua motuhake. Ko tēnei rūnau whakahaere mōhio e whakauru ana i ngā ture haumaru tōmua e tiaki ana i ngā wharewhare me ngā kaiwhakahaere i roto i ngā take whakatupu whakamā.