minesweeping is the practice of the removal of explosive naval mines, usually by a specially designed ship called a minesweeper using various measures to either capture or detonate the mines, but sometimes also with an aircraft made for that purpose. minesweeping has been practiced since the advent of naval mining in 1855 in the crimean war.
a bucket-wheel excavator bwe is a heavy equipment machine used in surface mining. the primary function of bwes is to act as a continuous digging machine in large-scale open-pit mining operations, removing thousands of tons of overburden a day.
joy mining machinery operated a global network of service centers and warehouses to help underground mining operations obtain high levels of equipment and mining systems reliability and productivity. joy applies a “life cycle management” strategy to help optimize the utility and potential life of the equipment it designs, builds and .
in underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. modern hoists are normally powered using electric motors, historically with direct current drives utilizing ward leonard control machines and later solid-state converters thyristors , however modern large hoists use alternating current drives that are variable frequency controlled. 1
joy global inc. jgi is a mining machinery and service support company based in milwaukee, wisconsin usa. it consists of two operating units – p&h mining equipment and joy mining machinery. p&h mining equipment specializes in the design, manufacture and support of equipment applied to surface mines.
mine safety is a broad term referring to the practice of controlling and managing a wide range of hazards associated with the life cycle of mining-related activities. mine safety practice involves the implementation of recognised hazard controls and/or reduction of risks associated with mining activities to legally, socially and morally acceptable levels.
longwall systems have their own hydraulic roof supports which advance with the machine as mining progresses. as the longwall mining equipment moves forward, overlying rock that is no longer supported by coal is allowed to fall behind the operation in a controlled manner. the supports make possible high levels of production and safety.
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.. operation. basic coal tipples simply load coal into railroad cars. many tipples had simple screening equipment to sort coal .