Core Drilling dej rau geotechnical tshawb

Coring hu ua drilling, nyob rau lub laum tawm kem (tub ntxhais) lawm pob zeb vim hais tias pob zeb puas tsuaj tshwm sim tsuas yog nyob rau hauv lub ntsej muag nplhaib. Technological drilling cuab tam yog ua los ntawm cov khoom, Coring raj, raj adapters, xyaum rods, xyaum qhia raj thiab caj pas. Core Drilling npaj nyob rau hauv 1862 Swiss J. Lesho.

Core kom zoo dua ntawm txoj kev yog hais tias nws yuav drilled yuav luag tag nrho cov pob zeb coring. Los ntawm cov tub ntxhais yog muab lub sij hawm los muab cov feem ntau muaj tseeb cov lus qhia txog lub geological seem. Core Drilling yog siv nyob rau hauv roj thiab cov nkev drilling nyob rau hauv geological num hab kuas tej hauj lwm. Nws yog indispensable rau lub kev tshawb kawm ntawm mineral deposits, thiab yog feem ntau siv rau cov dej qhov dej, nyob rau hauv geochemical kev tshawb fawb thiab geological engineering ntawv tshawb fawb.

Qhov no hom ntawm drilling yog dej num, nyob ntawm seb qhov kev ncua deb ntawm lub hauv qab tawg lawm hais ntawm pob zeb xws drilling txoj kev: qhuav, purge nrog compressed cua, siv ib tug ntxuav kua (dej los yog cov av nkos).

Core Drilling yog siv rau kev tsav tsheb ntawm qhuav av nplaum thiab ruhlyakovyh tuab pob zeb. Nrog si nyhav reciprocating drilling ntsis ROP qhuav nws yuav ua tau zoo, tab sis sab tub ntxhais yog deformed ho, uas ua rau distorted cov ntaub ntawv thiab tsis tsim nyog nyob rau hauv cov ntaub ntawv ntawm engineering dej raug drilled. Thaum tsav tsheb nyob rau hauv argillaceous pob zeb ua txhaum lawv cov natural qauv thiab cov av noo vim lub cua sov rau cov tub ntxhais thiab cov deformation (curling, los yog ncab). Drilling qhuav rau weathered pob zeb tseem muab yuam kev ntaub ntawv rau cov neeg kawm ntawv ntawm weathering ntawm pob zeb, loj yuam kev yog tseem tau (tsis pub dhau 0.5 m) nyob rau hauv lub ntsiab txhais ntawm txheej ib thaj tsam, yog li tus neeg khaubncaws sab nraud povtseg ntawm cov pob zeb nrog ib tug tso zis ntawm 0.25 los yog ntau tshaj (mus txog 0.5 m ) yuav rho (tsis sau tseg) ntawm documenting uas tseem tsis tsim nyog nyob rau hauv geotechnical soj ntsuam.

Core Drilling yog siv los ntxuav tawm huab cua thaum tsav tsheb weathered pob zeb, xuab zeb thiab av nplaum ruaj khov thiab permafrost. Meej pem siv nrog kais dej nyob rau hauv hard pob zeb thiab nyob rau hauv kev ruaj khov poluskalnyh pob zeb. Qhov no txoj kev muab ib tug zoo zoo geotechnical ntaub ntawv.

Core Drilling weathered pob zeb nyob rau hauv thiaj li yuav zoo tshaj plaws khaws cia cov tub ntxhais yog nqa tawm ob kem kav ua ntawv thov los yog ejector coring projectiles. Hom me me (txog li Qeb III), medium hardness (qeb IV -V) thiab cov khoom (V -VIII) drilled carbide crowns. Rau hard pob zeb (IX - XII) thiab cov khoom pob zeb diamond yog siv thiab txhaj tshuaj yas. Thaum cov tub ntxhais drilling yog ib qho tseem ceeb mus soj ntsuam cov drilling hom - razruschayuschy axial load rau lub cuab tam, projectile ceev (Rev. / min) thiab nyob rau hauv tus txheej txheem tso cai rau rau kais ntim (l / min) kua pub.