Mining ceased in 1967 and water pumping from the mines ceased. Kunyang Phosphorus Mine is one of the three major phosphorus mines in the country. Haul trucks are used in large surface mines and quarries. The effect on British coal mines was profound. Hematite is present in the waste tailings of iron mines. Besides working in factories children worked in mines. It has broken leg symbolizing opposition to land mines and cluster bombs. Unemployment ended as the mines, railroads. Others died in Spanish owned gold mines. Gadgets like bombs, mines, and spike balls are also used. Some settings provide for the inclusion of objects such as land mines and explosive barrels. The early Michigan copper mines used buddles. Logistics involves technologies analogous to those applied in land mines. Submarines were responsible for laying 18,553 mines. The mines and stamping mills ran three shifts.