Gcoba isigxobo ngokuya maphakathi nendawo yenqwaba, bese udweba i-arc eyindilinga ngomcako, bese umba umgodi ngesandla noma i-excavator ukuze umbe umgodi, ufake i-casing yensimbi, bese ucindezela umugqa wokudonsa wenqwaba elinganisiwe, ukuthi indawo emaphakathi ye-casing iyafana nendawo yenqwaba elinganisiwe nelinganiselwe. Amaphuzu aphakathi nendawo ayaqondana, futhi ukuma nokuma okuvundlile kwekesi kufanele kulungiswe ngesando somugqa. Izinga lokuthambekela akufanele libe likhulu kuno-1%, futhi ukuchezuka akufanele kube kukhulu kuno-50ram. Lapho ungcwaba i-casing, izindawo ezizungezile kufanele zigcwaliswe ngobumba olusezingeni eliphezulu, futhi zihlanganiswe ngokulinganayo ngezingqimba. I-diameter yangaphakathi ye-casing kufanele igcwaliswe ngemuva. Kufanele ibe nkulu ngo-20-40cm kunobubanzi benqwaba, futhi ukujula okuvamile kokushumeka kube ngu-200-400cm. Lapho ungcwaba i-casing, iphakama ngo-30cm kunenhlabathi yemvelo, futhi kuvulwe indawo yodaka phezulu, ebheke emgodini wodaka. Ezimweni ezikhethekile, ukujula kwe-casing kungandiswa, futhi amandla adonsela phansi odaka angandiswa (udaka lungathululelwa obumba), futhi umthelela ungahamba kancane. Yehlisa ngokufanelekile izinga lamanzi ku-casing. Uma unqenqema lwethubhu lokuvikela luvezwa emanzini, indawo ezungezile ingagcwaliswa ngobumba ukuze kuqiniswe ithubhu elivikelayo. Ukuncishiswa okukhulu kanye nokugudluzwa kufanele kusetshenzwe kabusha futhi kushunyekwe kabusha ukuze kuvikelwe ikesi; uma udonga lwembobo ebhoboziwe luvuza, lungaphinda lusetshenziswe ubumba noma i-potassium eluhlaza (impushana yodaka) ukwenza i-slurry ukuze kwandiswe ingxenye yodaka; ngemva kokuba i-casing ingcwatshiwe, kufanele isetshenziswe Isando somugqa kanye nerula yokhuni, ulinganise ibanga ukusuka onqenqemeni lwebhokisi ukuya enkabeni yesikhundla senqwaba endaweni ephambanayo (noma ohlangothini oluhle noma oluvundlile lomzila), futhi yenza amarekhodi okuqala okwakha. Ukuchezuka, ukuchezuka akufanele kube kukhulu kuno-5em. Futhi izinqwaba zonogada zingcwatshwa emlonyeni womlindi (zingcwatshwe endaweni ephambanayo futhi zidwetshwe amamaki amane), ukuze opharetha kanye nomhloli wekhwalithi bakwazi ukusebenzisa indlela yesiphambano ukuze bathole indawo emaphakathi yenqwaba.
Isikhathi sokuthumela: Feb-08-2022
