Izindlela ze-Electromagnetic ku-Geophysics
I-Pendahuluan
Izindlela ze-electromagnetic ku-geophysics zingenye yezindlela ezisetshenziswa ukuphenya isakhiwo se-subsurface yoMhlaba. Le ndlela ihilela ukulinganisa amasimu kagesi athonywe yizakhiwo zikagesi kanye ne-magnetic zezinto ezingaphansi komhlaba. Lezi zindlela zinezindlela eziningi zokusetshenziswa, okuhlanganisa ukuhlola amaminerali, ama-hydrocarbon, amanzi angaphansi komhlaba, ngisho nangezinjongo ze-geotechnical njengokucwaninga ukukhetha izindawo zokuthuthukiswa kwengqalasizinda. Kulesi sihloko, sizoxoxa ngezimiso eziyisisekelo zezindlela ze-electromagnetic, izinhlobo zezindlela ezivame ukusetshenziswa, ukusetshenziswa kwazo okusebenzayo, kanye nezinzuzo zazo ngaphezu kwezinye izindlela ze-geophysical.
Izimiso Eziyisisekelo Zezindlela Zama-Electromagnetic
Izindlela ze-electromagnetic zisekelwe esimisweni sokuthi amasimu kagesi angathonywa yizakhiwo ze-electromagnetic zezinto ezingaphansi komhlaba. Lapho amasimu kagesi engena emhlabeni, izinguquko kulawo masimu zingatholakala futhi zihlaziywe ukuze kutholakale ulwazi mayelana nezakhiwo ezingaphansi komhlaba.
Ukungeniswa kwe-Electromagnetic
Esinye sezimiso eziyinhloko zezindlela ze-electromagnetic ukungeniswa kwe-electromagnetic. Uma kusetshenziswa i-alternating current (AC) ku-coil noma ku-loop yentambo, kudalwa insimu ye-electromagnetic. Le nsimu ibe isingena enhlabathini futhi ibangele imisinga kagesi noma amasimu esibili, ikakhulukazi ezintweni eziqhubayo ezifana namaminerali, amanzi angaphansi komhlaba ane-ionized, noma idwala elimanzi. La masimu esibili akhiqiza izimpawu ezingatholakala ngezinsimbi ezisebusweni noma emigodini.
Ukumelana Nogesi
Ukumelana kukagesi yikhono lento ethile lokumelana nokugeleza kwamandla kagesi. Ukulinganisa ukumelana kukagesi kunikeza ulwazi mayelana nokwakheka komhlaba ongaphansi komhlaba. Izinto eziqhuba ugesi ezifana namanzi angaphansi komhlaba noma amaminerali ensimbi ngokuvamile zinokuphikisana okuphansi, kuyilapho izinto ezingezona eziqhuba ugesi njengedwala elomile zinokuphikisana okuphezulu.
Izinhlobo Zezindlela Zama-Electromagnetic
Kunezinhlobo ezahlukene zezindlela ze-electromagnetic ezisetshenziswa ku-geophysics, ngayinye inezinzuzo zayo kanye nokungalungi kwayo, futhi imininingwane yazo incike ekusetshenzisweni nasekujuleni okufiswayo. Ezinye zalezi zindlela zifaka:
I-Magnetotelluric (MT)
I-Magnetotellurics inqubo esebenzisa amasimu kagesi emvelo omkhathi woMhlaba kanye ne-ionosphere. Ukulinganisa i-MT kwenziwa ngokuthola izingxenye zensimu yamagnetic kanye nekagesi ebusweni boMhlaba. Le ndlela isebenza kahle kakhulu ekuhloleni okujulile futhi ibucayi kakhulu ekushintsheni kokumelana komhlaba ongaphansi komhlaba kuze kufike ekujuleni kwamakhilomitha amaningana. Inzuzo enkulu ye-MT yikhono layo lokumaka izakhiwo ze-geological ezijulile nokuhlonza izindawo ezinamaminerali noma ama-hydrocarbon reservoirs.
I-Time-Domain Electromagnetic (TDEM)
Indlela ye-Time-Domain Electromagnetic ihilela ukuthumela i-pulse kagesi emhlabathini kanye nokulinganisa impendulo yensimu ye-electromagnetic endaweni yesikhathi. I-TDEM ivame ukusetshenziselwa ukuhlola okungajulile (kuze kufike kumamitha angamakhulu amaningana) futhi isebenza kahle kakhulu ekuhlolweni kwamanzi angaphansi komhlaba kanye namaminerali ekujuleni okuphakathi. Isignali yokuphendula ilinganiswa phakathi nesikhathi ngemva kokuba i-pulse kagesi iqediwe, inikeze ulwazi mayelana nesakhiwo sokumelana ne-subsurface.
I-Frequency-Domain Electromagnetic (FDEM)
Ngokungafani ne-TDEM, indlela ye-Frequency-Domain Electromagnetic ihilela ukuthumela isignali yemvamisa engaguquki emhlabathini kanye nokukala impendulo yensimu ye-electromagnetic endaweni yemvamisa. I-FDEM isetshenziswa kakhulu ekuphenyweni okungajulile futhi iwusizo kakhulu ekuhlolweni kwemvelo, njengokuthola ukungcola noma ukumaka ukungcola kwamanzi angaphansi komhlaba. Amaza ahlukahlukene asetshenziswayo avumela ukulinganiswa kokumelana ekujuleni okuhlukahlukene.
I-Ground Penetrating Radar (GPR)
I-Ground Penetrating Radar isebenzisa ama-radar pulse avame kakhulu ukumaka izakhiwo ezingaphansi komhlaba. I-GPR isebenza kahle kakhulu ekusetshenzisweni okungajulile (kuze kufike kumamitha ambalwa) njengokuvubukula, ukumaka ingqalasizinda engaphansi komhlaba, kanye nokuhlonza izinto ezifana nezintambo noma amapayipi. I-GPR inesisombululo esiphezulu futhi inganikeza izithombe ezinemininingwane zezingqimba nezakhiwo ezifihliwe.
Izicelo Eziwusizo
Izindlela ze-electromagnetic zinezindlela eziningi zokusebenzisa ku-geophysics kanye nezimboni ezihlobene. Ezinye izinhlelo zokusebenza ezisebenzayo zifaka:
Ukuhlola Amaminerali kanye ne-Hydrocarbon
Enye yezindlela eziyinhloko zokusebenzisa i-electromagnetic ukuhlola amaminerali nama-hydrocarbon. Amasu anjenge-magnetotellurics kanye ne-TDEM asetshenziselwa ukuthola izendlalelo ezinamaminerali noma ama-hydrocarbon reservoirs ekujuleni okukhulu. Lolu lwazi lubaluleke kakhulu ezimbonini zezimayini kanye nezimboni zikawoyela negesi, okunciphisa izingozi zokuhlola kanye nokwandisa impumelelo yokumba.
I-Hydrology kanye Namanzi Angaphansi Komhlaba
Izindlela zikagesi zisetshenziswa nasezifundweni ze-hydrology kanye namanzi angaphansi komhlaba. I-TDEM kanye ne-FDEM zingasetshenziswa ukumaka ama-aquifer, ukuthola imithombo yamanzi angaphansi komhlaba, kanye nokuqapha ukungcoliswa kwamanzi angaphansi komhlaba. Lolu lwazi lubalulekile ekuphathweni kwemithombo yamanzi okusimeme, ikakhulukazi ezindaweni ezibhekene nokucindezeleka kwamanzi noma isomiso.
Ubunjiniyela be-Geotechnical kanye ne-Civil
Kubunjiniyela be-geotechnical kanye nobunjiniyela bezokwakha, izindlela ze-electromagnetic zisetshenziselwa uphenyo lwenhlabathi kanye nokuhlonza izinkinga ezingaba khona njengemigodi yokucwila, imigodi engaphansi komhlaba, noma izendlalelo zenhlabathi ezingazinzile. I-Ground Penetrating Radar, ikakhulukazi, isetshenziselwa ukuhlola kwangaphambi kokwakhiwa ukuthola ingqalasizinda engaphansi komhlaba okungase kudingeke igwenywe ngesikhathi sokwakhiwa.
I-Arkeology
Kwezemivubukulo, i-Ground Penetrating Radar ivame ukusetshenziswa ukumaka izindawo zemivubukulo ngaphandle kokumba okubanzi. I-GPR ingabona izici ezifana nokwakha izindonga, amathuna, kanye nezinto zobuciko zemivubukulo ezingcwatshiwe, okuvumela abavubukuli ukuhlela ukumba ngendlela ephumelela kakhulu.
Izinzuzo Zendlela Ye-Electromagnetic
Izindlela ze-electromagnetic zinezinzuzo eziningana kunezinye izindlela ze-geophysical. Lezi zinzuzo zifaka:
Akubhubhisi
Enye yezinzuzo eziyinhloko zendlela kagesi ukuthi ayibhubhisi. Le ndlela ayidingi ukubhoboza noma ukumba, ngakho-ke ayilimazi imvelo noma indawo ephenywayo.
Ukusebenza Kahle Kwesikhathi Nezindleko
Izindlela ze-electromagnetic ziyashesha futhi zingabizi kakhulu uma ziqhathaniswa nezindlela zokubhoboza noma zokumba. Ukuhlolwa kwe-electromagnetic kungamboza izindawo ezinkulu ngesikhathi esifushane, kunikeze idatha ebalulekile yokuhlaziywa okwengeziwe.
Amandla Okungena
Ukusebenzisa amasimu kagesi, le ndlela ingangena emhlabathini iye ekujuleni okukhulu, ivumele ukuhlola okujulile futhi inikeze isithombe esiphelele sezakhiwo ezingaphansi komhlaba.
Ukuvumelana nezimo
Izindlela zikagesi zingasetshenziswa ezindaweni ezahlukahlukene kanye nezimo zomhlabathi. Kusukela emahlathini aminyene kuya ezingwadule ezomile, le ndlela inokuguquguquka kokusetshenziswa ezimweni eziningi ezahlukene.
Isiphetho
Izindlela ze-electromagnetic ku-geophysics zingamathuluzi asebenza kahle kakhulu ocwaningo olungaphansi komhlaba. Ngokusekelwe ezimisweni eziyisisekelo zokulinganisa ukungeniswa kwe-electromagnetic kanye nokumelana kukagesi, lawa masu anganikeza idatha ebalulekile yamaminerali, i-hydrocarbon, ukuhlola amanzi angaphansi komhlaba, kanye nezinye izinhlelo zokusebenza eziningi. Izindlela ezifana ne-Magnetotellurics, i-TDEM, i-FDEM, kanye ne-GPR ngayinye inezinzuzo zayo kanye nokusetshenziswa kwayo. Njengoba zingabhubhisi, zisebenza kahle, futhi ziguquguquka, izindlela ze-electromagnetic ziyisinqumo esiyinhloko ocwaningweni lwesimanje lwe-geophysical.
