Currently, hundreds of millions of internal combustion engines are in operation in the world. According to various data, they burn more than 1 billion tons of oxygen per year, emit into the atmosphere 120-150 million tons of carbon monoxide, more than 1 million tons of sulfur oxide, tens of millions of tons of unburned hydrocarbons and nitrogen oxides. The situation is particularly difficult at open-pit mining operations, where a large number of dump trucks with a carrying capacity of 30-180 tons, bulldozers and other equipment are concentrated in a relatively small space. Synergetic interaction of individual components of harmful emissions and dust particles forming photochemical smog cause changes in physiological processes in the human body. In addition, in some periods at the quarries due to severe atmospheric pollution completely or partially stops work, waiting for ventilation idles expensive mining and transportation equipment.
In the design of mining enterprises one of the most difficult tasks is to justify the method of opening the open pit field and the choice of transportation.
The efficiency and reliability of the functioning of mining enterprises with open-pit mining method depends on a number of factors: mining and geological conditions, geographical location of enterprises, climatic conditions, annual productivity of the open pit, the structure of the applied schemes of extraction and transportation.
In the last decade more and more widespread use at quarries find dump trucks and road trains of greater load capacity, working in conjunction with powerful excavators.
The purpose of the study was to establish the characteristics of load modes of electromechanical transmission of heavy-duty dump trucks on a typical route of a deep-type quarry depending on the driving conditions - the characteristics of the road route and the degree of weight loading of the dump truck ...
Fuel efficiency of road transport is determined by a number of factors that can be combined into three groups depending on the vehicle design, driving conditions and operational characteristics ...
Increase of efficiency of use of dump trucks is impossible without scientifically grounded estimation of their operational qualities, operating conditions and level of organization of technological process. Long experience of operation of heavy-duty dump trucks has shown that the modes of their operation in the conditions of the North sharply differ from the modes of operation at the quarries located in more favorable climatic zones.
Long-term practice of deep ore dumps shows that in their operation there are significant difficulties, especially in the harsh climatic conditions of the Arctic Circle ...
One of the urgent issues of operation of belt conveyor lines of the mining industry is the improvement of existing and finding new ways of cleaning conveyor belts ...
Widespread use of conveyor transportation in some cases is limited by the shortcomings of traction and load-carrying bodies of existing types of conveyors. Belt conveyors with rubberized fabric (cotton and synthetic) belt have a relatively small length per drive and short belt life. The disadvantage of belt conveyors with rubber tether belt is the high cost of the belt and its repair (amortization of the cost of the belt is up to 50% of the total cost of transportation). Belt-and-channel conveyors have a complex belt design and, accordingly, its cost is high. Belt-chain, slat and scraper conveyors have a small length per drive, low strength and very high weight of the traction body ...