Analisis Kebutuhan Airflow Budget Di Level Extraction Pada Tambang Bawah Tanah Di Area Deep Mill Level Zone (Dmlz) PT. Freeport Indonesia Timika Papua: Analysis Of Airflow Budget Needs In Extraction Level Of Underground Dmlz Airflows Pt Freeport Indonesia District Tembagapura, District Mimika, Province Of Papua. PROMINE 2021, 9 (1), 6-12. https://doi.org/10.33019/promine.v9i1.2272.