Extraction in the Garaveh Mine
Extraction in this mine is performed in two methods. For thicker areas (thickness greater than 5 m), the open-pit method is used, and for areas with less thickness, groundwater method is used. In the open-pit method, the tailings thickness is about 70 meters. It is extracted using stair open extraction in which stairs have height of 12 meters and width of 10 meters. The underground method in this mine is of the type of the room and the foundation, which its foundations are 2-3 meters in width and the type of materials is extracted from minerals and the extraction recovered is about 60 precents.
Extraction in Ahangharan Mine
Extraction of iron in the mine is performed using open-pit and stair method. The height of the stairs is about 15 meters. Ironstone grade is about 40% of pure iron. The extraction of Iron Ore is performed using a classic method, including drilling and firing. If the ore deposit discovered by exploration engineers is sufficiently rich and the volume of its storage is considerable, so that extraction of the material is economically profitable, it will be called mine. The art of extracting material from a mine is also a branch of mine engineering called mining engineering. It is one of the oldest and most complex engineering fields of study in the world. Being qualified to study in this field of study will require an interest and basic information on engineering mathematics, advanced geometry, innovative designs, and spatial visualization, mechanics, and heavy machinery. Graduates of this field of study will be able to design, manage, and extract a mine explored until the delivery of raw materials to the market stage. Extraction engineering activities in the fields of excavation include creating open and underground spaces at small to very large dimensions, structural engineering and maintenance, transportation of excavated and extracted materials, ventilation throughout the underground, collecting groundwater, and ultimately minerals business and economics. At the same time, these engineers play a major role in tunnel and metro engineering, and the creation of underground spaces and caves of hydroelectric power plants in the dam construction industry and the environment.