Welcome to Zizwe | Opencast Mining (Pty) Ltd With more than 150 years experience in opencast mining, Bulk Earthworks, Bulk Materials Handling, Drilling, Blasting, Crushing, Screening and Rehabilitation. With more than 150 years experience in opencast mining, Bulk Earthworks, Bulk Materials Handling, Drilling, Blasting, Crushing, Screening and Rehabilitation.