UNIT OPERATIONS OF MINING - Underground mining
In underground mining, the production cycle is similar, although the equipment used may be scaled down in size. Smaller drillholes are used, trucks are sometimes replaced by shuttle cars, and belt conveyors are more prevalent. Coal, salt, potash, and trona are often mined without the use of explosives or mined after undercutting the face to reduce the consumption of explosives.(PDF) SURFACE MINING METHODS AND EQUIPMENT |,Open pit mining is the most common method for large-scale operations, whereas underground mining is generally the most ©Encyclopedia of Life Support Systems (EOLSS) CIVIL ENGINEERING – Vol. II - Surface Mining Methods and Equipment - J. Yamatomi and S. Okubo effective for small-scale operations. Most bauxite, iron, and copper ore is mined by open pit techniques, lead and zinc ore are,Mining risks: Coal, uranium, phosphate, bauxite, iron ore,,Coal mining risks. Coal mining has been one of the most common (and dangerous) forms of mining for a number of years. Thousands of people have died in coal mines, and hundreds continue to face the safety hazards of mining coal. In addition, the infrastructure around mines such as colliery spoil tipes have collapsed in the past, damaging the environment and killing people.