Mining Machinery is a mechanical equipment used for direct mining of useful minerals and mining preparations, mainly mining machinery for mining metal ores and non-metallic ores; coal mining machinery for mining coal; and oil drilling and mining machinery for oil extraction.
The first pneumatic disk shearer was designed by British engineer Walker and was manufactured in about 1868. In the 1880s, hundreds of oil wells in the United States were successfully drilled with steam-powered impact drills; in 1907, Oil and gas wells were drilled with a roller rig and used in open pit drilling since 1937.
Mining machinery is mainly used for underground and open pit mining machinery, including drilling machinery for drilling holes; excavating machinery and loading and unloading machinery for excavating ore; drilling machinery for drilling patios, shafts and flats.
The drilling machine is divided into two types: rock drill and drilling rig. The drilling rig has the distinction of open drilling rig and underground drilling rig. The rock drill is used for drilling blastholes with a diameter of 20~100 mm and a depth of less than 20 meters in the rock above medium hardness. According to its power, it can be divided into pneumatic, internal combustion, hydraulic and electric rock drills.
The rock drilling machine is the most widely used; the open-air drilling machine is divided into steel rope impact drilling machine, down-the-hole drilling machine, cone drilling machine and rotary drilling machine according to the working mechanism of broken ore rock. Among them, the steel rope impact drilling machine has been gradually replaced by other drilling machines due to low efficiency.
The boring machine uses the axial pressure and the slewing force of the tool to produce a rolling effect on the rock face, and directly breaks the roadway or the well-forming machinery of the rock. The knives used are disc hobs, wedge hobs, ball hobs and milling tools. According to the different roadways, it can be divided into a patio drill, a shaft drill and a tunnel excavator.
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