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Kayenta mine. The Kayenta mine was a surface coal mine operated by Peabody Western Coal Company, a subsidiary of Peabody Energy) on the Navajo Nation in northern Arizona from 1973 to 2019. [1] About 400 acres were mined and reclaimed each year, providing about 8 million tons of coal annually to the Navajo Generating Station. [2]: 1.
Coal breaker. A coal breaking plant, depicted on a postcard in 1907. A coal breaker is a coal processing plant which breaks coal into various useful sizes. Coal breakers also remove impurities from the coal (typically slate) and deposit them into a culm dump. The coal breaker is a forerunner of the modern coal preparation plant.
These features helped her succeed in the competitive British coal market. [9] The first self-unloader was the lake freighter Hennepin in 1902 on the Great Lakes. This greatly decreased the unloading time of bulk carriers by using conveyor belt to move the cargo. [11] The first bulk carriers with diesel propulsion began to appear in 1911. [9] [10]
The main gate is the intake airway and the conveyor belt road to move coal from the face to the shaft. [6] Man winding. Man winding: the process of using the cage to transport workers up or down the shaft. Also referred to as manriding, though the latter also referred to transport elsewhere in the pit.
A belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with a closed loop of carrying medium—the conveyor belt—that rotates about them. One or both of the pulleys are powered, moving the belt and the material on the belt forward. The powered pulley is called the drive pulley while the unpowered pulley is ...
This was the only coal slurry operation in the country and the only plant that used groundwater for transport. Coal from the Kayenta mine was moved via conveyor belt to a silo from where it was loaded and shipped by train to the Navajo Generating Station coal plant. The Black Mesa Mine's last day of operation was December 31, 2005.
A bucket-wheel excavator (BWE) is a large heavy equipment machine used in surface mining. Their primary function is that of a continuous digging machine in large-scale open-pit mining operations, removing thousands of tons of overburden a day. What sets them apart from other large-scale mining equipment, such as bucket chain excavators, is ...
Tipple. A tipple is a structure used at a mine to load the extracted product (e.g., coal, ores) for transport, typically into railroad hopper cars. In the United States, tipples have been frequently associated with coal mines, but they have also been used for hard rock mining.
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