Imishini yokucekela umhubhe (ama-TBMs) ngamathuluzi abalulekile embonini yokwakha, ikakhulukazi kumaphrojekthi angaphansi komhlaba afana nemigwaqo engaphansi komhlaba, izinhlelo zendle, nemigudu. Enhliziyweni yale mishini kukhona umshini wokusika womhubhe, ingxenye ebalulekile enquma ukusebenza kahle nokusebenza kwenqubo yokuhubhe. Ukuqonda indima nokusebenza kwalaba abasiki kunganikeza okuyigugu