Determination of annual output of mining
Determination of annual mine output The scale of production of the mine (ie annual production) is an important basis for determining the mining design. Therefore, when designing the mining, the annual production of the mine must be determined first. When determining the scale of mine production, we must first consider the needs of the national economy, and also consider the possibility and rationality of mine geological conditions and mining technical and economic conditions. 1. The annual output should meet the requirements of the national economic plan. The socialist economy is planned to be developed in proportion. When determining the annual output, it is necessary to take into account the state's need for the ore of this species and to achieve planned production. In the course of construction, the guidelines for large and medium-sized enterprises should be followed. Second, when determining the annual output, do technical verification The possible mining strength should be calculated based on the geological conditions of the deposit, combined with the mining technology used, in order to determine the annual production that can be achieved from the mining technology. The following two methods are commonly used. (1) Checking the annual output with the annual drop depth of the deposit In the depth of decline is an indicator of the intensity of exploitation, which in meters / year, that is, the depth can be mined each year down, the mine is currently mining of metal intensity of 10 to 20 m / year. If the recoverable area S, the ore bulk density V, the recovery rate P, and the waste rock mixing rate P are all known, the annual output A of the mine can be estimated by determining the annual decline depth V according to similar mine conditions. (2) Checking the annual output according to the number of mining areas that may be recovered at the same time Due to the complicated and variable conditions of the deposit, the grade is very uneven. Therefore, according to the specific conditions of the deposit, the mining area is arranged to determine the number of mining areas that may be produced at the same time, so that the possible calculation can be calculated. Annual production. When arranging the mining area, the number of mining areas that are usually produced at the same time is the number of possible mining areas. The remaining mining areas serve as production prospecting, mining preparation, grade deployment and spare mining areas. Using this method to determine the annual output, although the workload is large, but the work is more detailed, the results are more realistic, and is often used in the design. Third, the annual output should be adapted to the reasonable economic life of the mine. When the deposit reserves are fixed, the relationship between the annual output A, the mine calculation service period t" and the deposit reserve Q is as follows: The recovery rate of P-ore in the formula, %; P- waste rock mixing rate, %; T1 - Calculate the service life, year. The calculation service life of the mine does not take into account the impact of the initial production and the final production at the end of production. Therefore, the actual total service life t of the mine is always longer than the calculation service life t1, and the growth time t2 is generally 1 to 5 years. The above relationship can be expressed by the formula t=t1 + t2. It can be seen from the above relationship that when the amount of minerals is constant, the output is large, the service life is short, the output is small, and the service life is long. Under normal circumstances, the investment in small capital construction is small and the production cost is high. If a larger annual production is used, although the capital investment will be increased, the production cost is low and the total cost is relatively low. If the output is too large and the service life is too short, the capital construction depreciation expense amortized per ton of ore cost will increase excessively, and the total cost will increase, resulting in economic irrationality. Therefore, from the perspective of economic effects, reserves, annual output, and service life should be adapted to match the production costs of mining and ore processing with the amortization of infrastructure costs, so that product costs are minimized. For the economic and reasonable total service life of mines of different scales, please refer to the requirements of the following table. Mines that are accelerated for special needs can be appropriately shortened. Reasonable service years for different types of mines Mine type ore annual output (ten thousand tons) mine service life (year) Harmonize Lines Constant Force Actuator Our harmonizing lines Force Control System, Harmonizing lines Constant Force Actuator, Harmonizing lines active contact flange have many advantages over other grinders. It can realize flexible grinding, quick repsond to surface changing, and instant adjusting. Traditional mechanic hand lacks flexibility, and it is not easy to adjust, hard to realize mass production. Harmonizing lines constant force actuator,Harmonizing lines active contact flange,Harmonizing lines force control system DARU Technology (Suzhou) Co., Ltd. , https://www.szdaruactivecontactflange.com