Large-scale development of equipment in the development of large-scale coal mines Open-pit mining processes and equipment are briefly compared. Nowadays, any mining process adopted in various countries has its own advantages and disadvantages. Which mining process is to be adopted depends on the occurrence conditions of the ore body, including the nature of cover material hardness water content. Comprehensive comparison of factors such as the size and other conditions of air-conditioning equipment and the comprehensive benefits of technical reliability, ease of management, etc., to determine a good economic efficiency program. The single-bucket and one-vehicle program has advantages of less initial investment, convenient and flexible use, rapid construction, small infrastructure, high work efficiency, and a wide range of applications. The main disadvantage is the high production costs, of which the high cost of automotive operations is the main factor. The vehicle's self-weight is about 42 of its total weight, fuel is wasted, and fuel consumption is higher than the cost of electricity. The price of auto spare parts and tires is high. It is generally believed that the automobile transportation distance can not be greater than that otherwise the production cost is higher, and the coal price, equipment manufacturing capacity and the disadvantages are more obvious. Continuous process scheme A bucket wheel excavator A belt conveyor A row of soil machine's main advantages are continuous production process, large capacity, high degree of automation, high work efficiency, lower production costs. The main drawback is that the scope of application is limited, initial investment is high, and the control system is difficult. The weight of the bucket wheel is large, the design of the large size is difficult, the price of the equipment is high, and the price of the single bucket shovel with the same ability is double that of the latter. When the compressive strength of the material is greater than that, it is difficult to cut, and it is difficult to cut when there is a large amount of gravel, and a series of failures of the belt conveyor are caused by freezing or sticking. If the moisture content is too large, it will be difficult to walk and it will be easier to bond. When multiple devices form a continuous operation line, any one of them fails and the entire line is shut down. Automation control is difficult. Its ideal application condition is that the material is soft, does not contain water, and does not freeze. Semi-continuous process, the basic form is a single bucket a mobile crusher belt conveyor a row of earth planes. But there can be a variety of device cooperation. The characteristic is that there is no need for a bucket wheel and no or less use of a car. This solution overcomes the shortcomings of the above two processes and is increasingly valued by various countries. At present, China is only used for coal mining, and it is not used for stripping. A Series Fiber Laser Cutting Machine
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