The modern mining industry, according to the method of mining, is divided into two main areas: open-pit mining, when materials are mined in a quarry, and underground, with the construction of mines. The technique used in mining is also divided - for each type of work, their own, often very specific machines are used. Moving down the chain of equipment from top to bottom, in the first place are overburden excavators used to excavate rocks and minerals in open-pit mining.
The hydraulic excavator is increasingly seen in the quarry, one after another, miners are abandoning the obsolete cable excavators, the so-called "mechanical shovels" - until recently the most common type of excavation and loading machines in open pits around the world. Once upon a time, any work began with them, for example, coal mining, but over the years, this type of equipment began to lose in terms of technical parameters to hydraulic models.
When the volume of work is not so large, mining excavators of a smaller class are used. This technique includes the Komatsu PC3000 hydraulic excavator. The heart of the machine is the company's own 12-cylinder, water-cooled, direct-injection engine with high performance.
