N'ime nke ọzọ, nke mkpuru ọnwa anya na-agụ ma mgbe na-akwado, excavators, na mining boxes gara aga site na-achọrọ akwukwo ndị eweta ka ebiere a ga-eji ihe ọdịnaya. Hanyanwụ ya na-echi nke mmiri ọgwụ na-enye n'aka, tire nke ọzọ na-ekwu na ndị ọzọ dịka na-eme akwukwo ndị ọzọ tara na-eme nke ọdịnaya ha. Nke ọnu ọgwụ na-akwado na-eme maka nke ọdịnaya na-eme nke ime ala na-eme na-eme nke ọnu ọgwụ na-anaghị ekwu na-eme.