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Off-highway Mining Dump Truck Explained

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Date: Oct 12,2022 View:5



Mining Dump Truck belongs to Off-highway dump trucks, which are dump trucks used to transport coal mines and sand in off-highway field sites, such as large open-pit mines and water conservancy projects. In civil engineering, it is often combined with construction machinery such as excavators, loaders, and belt conveyors to form a loading, transporting and unloading production line for loading and unloading of earthwork, sand, and bulk materials.

Off-highway mining dump truck is mainly composed of engine, chassis, control compartment (head), generator system, body (actuating system) and auxiliary power system.
The characteristics of off-highway mine dump trucks are: large tonnage, low consumption, high technical content and high price.

Classification according to the transmission mode: Off-highway mining dump trucks can be divided into electric wheel off-highway mining dump trucks and mechanical transmission off-highway mining dump trucks. The light duty of electric wheel off-highway mining dump truck is generally below 108 tonnage, and the heavy duty is generally below 108-360 tonnage; the mechanical drive off-highway mining dump truck is generally below 85 tonnage, and the heavy duty is generally 85-318 tonnage. In the 1970s, due to the lack of large hydraulic torque converters, mine dump trucks above 100 tons were completely dominated by electric drives. With the maturity of large hydraulic torque converters, Caterpillar in the United States has launched a 360-ton hydraulic transmission mining dump truck. In the mid-1990s, AC-AC direct electric drive technology began to be applied to 300-ton mine dump trucks.

Off-highway mine dump trucks have become the main means of transportation for the development and production of open-pit mines due to their advantages of good mobility, fast turnover, large load and large capacity. At present, only the United States, Japan, Belarus and a few industrialized developed countries in China can independently research and develop, and the series ranges from 100 tons to 360 tons.

In 2005, the market capacity of the international mining truck market was about 1,300, and the total loading was about 2 billion tons. Mining trucks are mainly used in coal mines, gold mines, copper mines and iron mines, and the users are mainly distributed in Australia and America. Among them, Australia is the largest user of mining trucks in the world. China and Mongolia are emerging as the fastest growing mining dump truck markets.

Since the invention of mining electric wheel dump trucks in 1963, after more than 30 years of continuous improvement and the adoption of a large number of new technologies, new materials and new processes, heavy-duty mining electric wheel dump trucks have matured as a new variety in automobiles. The mass has risen from 77 tons of the first car to the current largest 317.5 tons. Among the transportation equipment for large-scale open-pit mines with an annual mining volume of more than 10 million tons, mining electric wheel dump trucks have occupied 2/3 of the market, and are responsible for 40% of the world's coal and 90% of iron ore mining and transportation volume.

In the selection process of dump trucks for open pit mines, the selection of the vehicle tonnage should be considered to match the matching loading machinery. For example, the volume of a minecart is typically 3 or 4 times the volume of an electric shovel.
In addition, it is not that the larger the vehicle tonnage, the better. According to professional statistics in Australia, the optimal tonnage of dump trucks for open pit mines is 220 tons to 240 tons. Within this range, unit shipping costs are the lowest. The choice of the minecart body is crucial. Its cost is only 1/15 of the whole vehicle, but its impact on the use cost of the whole vehicle is as high as 1/5. The new dump truck body is made of high-strength alloy steel with bionic structure, streamlined body. The body weight is reduced by 20%, saving energy and reducing consumption by 10%. For a dump truck that consumes 3,000 liters of diesel per day, it is quite impressive. And its service life is 2-3 times that of traditional body.