This is because they are closely related and interacting with each other, and they are mutually constrained. If any two links are not properly matched, it will cause chaos in the entire production system, resulting in a decline in the production capacity of open pit mines, deterioration of production economic effects, and serious possibility. Leading to safety accidents; In addition, the equipment used in the three links is the most important mechanical equipment in open pit mines, with large quantities and tonnages, high investment, and direct impact on production costs and benefits.
Therefore, whether the selection and matching of the mining and drainage equipment in open pit mines is reasonable is of great significance for improving the quality of coal, completing production planning tasks as required, and increasing economic benefits.
In addition to the equipment in the three stages of mining and transportation, open-pit mines also need a large number of equipment for wearing and blasting, maintenance equipment, auxiliary engineering equipment, etc. The impact of these equipment on production is not very direct, but will affect the efficiency of the equipment. affect production.
Therefore, in addition to the reasonable matching of the type and quantity of the equipment, it is necessary to combine the production technology management and scientifically configure the auxiliary supporting engineering equipment to make the entire open coal mine system coordinate, stable and safe operation.
In order to solve the problem of equipment selection and matching, it is necessary to understand the manufacturing, technical parameter characteristics, adaptability, maintenance and development trend of related equipment in combination with mine resource occurrence, investment demand, surrounding climate environment and infrastructure. . With a global vision, system planning, determine the optimal system combination.
I. Factors affecting the selection of equipment in open pit mines
There are many models, specifications and types of equipment available for any particular open pit mine. How to rationally select equipment to make it the lowest in production cost, robustness, adaptability, technical performance and high production efficiency in the mine life cycle is a very complicated problem, and many factors need to be considered.
(1) Resource conditions. Including the occurrence of coal seams, coal seam structure, thickness of overlying rock layer, composition and physical and chemical properties of the stripper.
(2) The topography and geomorphology of the mining area, transportation conditions, climatic conditions and climate history data, energy supply conditions, regional human environment, supply and construction materials supply and other conditions.
(3) Coal mine production and possible range of variation, variation of stripping ratio, etc. The equipment required to be used is compatible with the scale of the mine. While maximizing the use of equipment at all stages of coal mine production, the coal mine equipment capacity has a certain adjustment space.
(4) Technical and economic factors. To select the best technical equipment for production, the general principle is technically advanced, production-appropriate and economically sound. In addition, when carrying out the specific work of equipment selection, the specific conditions of the equipment must be considered, including:
1 good performance. Refers to the advanced precision and technical performance of the equipment, high production efficiency, and can meet the requirements of production and management;
2 reliability is good. Refers to the better performance, accuracy and safety during the use of the equipment to ensure the stability and reliability of the equipment during operation;
3 good maintainability. Refers to the reasonable structure of the equipment, standardization and generalization of parts, strong interchangeability, easy maintenance and inspection, low energy consumption and low maintenance cost;
4 economy is good. Refers to low operating and management costs during the life cycle of the equipment, good work adaptability, and optimal overall operational efficiency;
5 environmental protection, occupational health and safety;
6 technical policies and advancement in the industry. Domestic equipment should be used preferentially to promote the development of domestic mining machinery.
Second, the classification of open-pit coal mine equipment
With the development of equipment manufacturing technology and the development characteristics of open-pit coal mines at different stages, equipment manufacturers consider the versatility of equipment within a certain range according to the scale difference of open-pit coal mines, and develop equipments with corresponding models and parameters to make them within a certain range. Adapt to the needs of efficient mining of open pit mines.
As of the end of 2013, the main parameters of different grades of equipment used in domestic open-pit coal mines are shown in Table 5-7-1, and the matching schemes for open-pit coal mine equipment classification are shown in Table 5-7-2.
The equipment grading selection matching scheme reflects the matching relationship between the mine scale and the equipment level, and also indicates the reasonable matching relationship between the various types of mining equipment.
It should be pointed out that in the selection of equipment, it is necessary to fully consider the specific technical factors such as the mining procedure and the designed mining parameters, so that the open pit mine can obtain the equipment assembly with the largest production capacity with the minimum investment.
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