Method for determining economical efficiency of positions of different crushing stations

Abstract

The invention discloses a method for determining economical efficiency of different crushing station positions, and belongs to the technical field of moving of strip mine crushing stations. By establishing an economic analysis and evaluation model, different schemes of the position of the crushing station are obtained, and construction is carried out according to the minimum cost after the sum of the costs of all the schemes is compared. According to the method, all factors possibly influencing the economical efficiency of the positions of the crushing stations are comprehensively considered, quantitative comparison of all the influence factors is achieved, the method for determining the positions of the different crushing stations with universal applicability is formed, economic indexes of the positions of the different crushing stations are comprehensively, efficiently, rapidly and accurately determined, the advantages and disadvantages of the scheme are judged, and the economic efficiency of the crushing stations is improved. Scientific and reasonable decision-making of the strip mine crushing station moving project is achieved, a good economic effect is achieved for the strip mine, and the working efficiency and quality of similar research are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of relocation of open-pit mine crushing stations, and in particular relates to a method for determining the economic efficiency of different crushing station locations. Background Art

[0002] With the widespread application of the single bucket-truck + crushing station-belt conveyor semi-continuous process in my country's open-pit mines, the number of projects related to the relocation of crushing stations is also increasing. Different crushing station location plans not only affect the development and transportation system of the entire mine, but are also closely related to the economic benefits of the open-pit mine. They need to be determined comprehensively from the aspects of the economy, safety and impact on open-pit mine production of different crushing station locations. Among them, economic analysis is the key core issue in determining the location of the crushing station, and it is also the primary issue that needs to be solved in the key technology research and application scientific research projects of belt conveyor and truck road three-dimensional intersection transportation.

[0003] The main reason for system relocation is that the belt conveyor, machineway and crushing station in the system restrict the advancement of open-pit mining sites, internal dumping sites or the economic efficiency and safety of the existing locations, or other factors such as other facilities and production impacts. Regardless of whether the crushing station is arranged on the ground or underground, a series of problems will be encountered, such as whether to relocate the crushing station, when to relocate, and where to relocate, which all need to be analyzed from an economic perspective. The key to the economic analysis of different crushing station locations is to determine the influencing factors and their calculation methods. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a method for determining the economic efficiency of different crushing station locations.

[0005] The technical solution adopted by the invention is: a method for determining the economic feasibility of different crushing station locations, the technical key points of which are to obtain the total cost of relocating the crushing station, the truck freight to the crushing station, the additional cost of the insufficient capacity of the existing equipment, the operating cost of the belt conveyor, the cost of the grade-separated bridge and culvert, the truck detour cost of other systems and the additional earthwork cost of other systems during the service period, and establish an economic analysis and evaluation model. The model constrains the total cost to be minimum, obtains different plans for the location of the crushing station, compares the total cost of each plan, and then carries out construction according to the plan with the lowest cost.

[0006] Preferably, the method for obtaining the total cost of relocation of the crushing station during the service period is: the sum of the first relocation cost and the relocation costs of each time during the service period, the formula is:

[0007] F y =∑ F yn = F y1 + F y2 +…+ F yn (1)

[0008] In the formula, F y— Total relocation cost, 10,000 yuan; F y1— First relocation cost, 10,000 yuan; F y2— Second relocation fee, 10,000 yuan; F yn— The cost of the nth relocation is ten thousand yuan.

[0009] Preferably, the method for determining the truck freight to the crushing station is:

[0010] The calculation is based on the crushing station's designed annual capacity, the truck's haul distance to the crushing station, the truck's unit operating cost, and the material's bulk density. The calculation formula is as follows:

[0011] F p =∑F pn

[0012] =∑(A / R×D n ×c y ) / 10000+(A / R×n×h×c t ) / 10000

[0013] = A / R×(∑D n ×c y +n×h×c t ) / 10000 (3)

[0014] In the formula, F p —Total truck freight to the crushing station, RMB 10,000;

[0015] In the formula, F pn —Truck freight to the crushing station in the nth year, 10,000 yuan; A—Annual production capacity of the production system, t / a; c y —Truck unit operating cost, yuan / m 3 km; h—truck lifting height, m; n—comparison service period, years; c t —Truck unit lifting cost, yuan / m 3 ·m.

[0016] Preferably, determining the additional cost due to the insufficient capacity of the existing equipment refers to: purchasing costs of trucks to the crushing station, and labor costs and outsourcing costs for the engineering quantity gap.

[0017] Preferably, the method for determining the operating cost of the belt conveyor is: calculating according to the length of the belt conveyor, the annual production capacity of the production system, the unit transportation cost of the belt conveyor and the comparative service period, and the calculation formula is as follows:

[0018] F J = A×L×C j ×n / 10000 (6)

[0019] In the formula, F j —Belt conveyor operation cost, RMB 10,000; L—belt conveyor length, km; C j —Unit transportation cost of belt conveyor, yuan / t·km.

[0020] Preferably, the formula for determining the fees of the grade separation bridge and culvert is:

[0021] F q = e / k×n (7)

[0022] In the formula, F q —cost of grade separation bridge and culvert, ten thousand yuan; e—one-time cost of grade separation bridge and culvert, ten thousand yuan; k—service life of bridge and culvert, years.

[0023] Preferably, the formula for determining the detour fee of the other system trucks is:

[0024] F r = Y×y×c w ×n / 10000 (8)

[0025] In the formula, F r —Other system truck detour costs, RMB 10,000; Y—Annual transportation volume affected by detour, m 3 / a; y—increased transport distance, km. w —Unit operating cost of trucks in the affected area, RMB / m 3 km.

[0026] Preferably, the calculation formula for determining the additional earthwork cost of the other systems is as follows:

[0027] F t =A t ×b (9)

[0028] In the formula, F t —Extra earthwork costs for other systems, RMB 10,000; A t — Additional earthwork volume of other systems, 10,000 m 3 / a; b—unit price of earthwork, yuan / m 3 .

[0029] The beneficial effects of the present invention are as follows: the method for determining the economic efficiency of different crushing station locations, by establishing an economic analysis and evaluation model, obtains different plans for the location of the crushing station, and after comparing the total cost of each plan, performs construction according to the plan with the lowest cost. It comprehensively considers various factors that may affect the economic efficiency of the location of the crushing station, realizes quantitative comparison of various influencing factors, and forms a set of methods for determining different crushing station locations with general applicability. By comprehensively, efficiently, quickly and accurately determining the economic indicators of different crushing station locations, judging the advantages and disadvantages of the plans, it realizes scientific and reasonable decision-making for the relocation project of the open-pit mine crushing station, achieves better economic results for the open-pit mine, and improves the work efficiency and quality of similar research. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Schematic diagram of the locations of different crushing stations;

[0032] Figure 2 A flow chart of a method for determining the economic efficiency of different crushing station locations according to an embodiment of the present invention; DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a brief description of the present invention in conjunction with the attached Figure 1-Figure 2 The present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

[0034] The method for determining the economic efficiency of different crushing station locations adopted in this embodiment includes the following steps:

[0035] S1, determine the feasible location plan of the crushing station;

[0036] The crushing station can be located under the pit or on the pit. If it is located under the pit, it can reduce the truck's transportation distance. If it is located on the pit, it can reduce the impact on the open-pit mining, transportation, drainage and development transportation system and the ground production system. The location of the crushing station should avoid adverse engineering geological conditions and ensure the safety and stability of the base.

[0037] Combined with the example, a mine's new No. 2 crushing system is designed with two locations. The location of the crushing station is as follows: Figure 1 As shown, the new No. 2 crushing station in Scheme 1 is located in the middle of the new 601 / 701 machine road, and the crushing station is arranged at level 654 in the middle of the east end of the mining site under the pit. The new No. 2 crushing station in Scheme 2 is located at level 691 near the 602 / 702 transfer station on the ground. Figure 1This is a schematic diagram of the location plan of the two crushing stations.

[0038] S2, collection of basic data required for calculation;

[0039] Including technical and economic parameters such as annual capacity of the system, bulk density of materials, unit operating cost of trucks and belt conveyors in the system, and unit investment per linear meter of belt conveyors;

[0040] Combined with the example, the annual production capacity of the newly invested No. 2 crushing system in a mine is determined to be 9.0Mt / a, and the bulk density of coal is 1.12t / m 3 , the bulk density of rock is 1.12t / m 3 , unit operating cost of trucks transporting stripping and coal c y 2.7 yuan / m 3 km and 2.2 yuan / m 3 ·km, the unit investment of belt conveyor is RMB 10,000 / m.

[0041] S3, comparison of total relocation costs;

[0042] The total relocation fee is the sum of the first relocation fee and the relocation fees of each time during the comparison service period. The calculation formula is as follows:

[0043] F y =∑ F yn = F y1 + F y2 +…+ F yn (1)

[0044] Where F y— Total relocation cost, 10,000 yuan;

[0045] F y1 —First relocation cost, 10,000 yuan;

[0046] F y2 - Second relocation fee, RMB 10,000;

[0047] F yn —The cost of the nth relocation, ten thousand yuan.

[0048] The first relocation cost is the investment in the initial location of the crushing station during the comparison service period. When calculating the relocation cost, it is necessary to first determine the relocation period of different location plans and the comparison period of the plans based on the time-space relationship of the mining site and the economic efficiency. When the relocation periods of different plans are different, if the relocation costs of each time are quite different, the first relocation period can be compared with the smaller value of the two relocation periods as the comparison service period. Assuming that there are two plans with the first relocation periods of x years and y years respectively, if x < y, the comparison service period is min (x, y) is x years, and the total relocation cost F of the first relocation period is yCalculation formula: Scheme 1 F y =F y1 +F y2 , Scheme 2F y =F y1 +x / y F y2 If the relocation costs each time are not much different, the relocation period can be determined by taking the average relocation costs of each time. The lowest common multiple of the different relocation periods of the two schemes can be used as the comparison service period. The number of relocation costs n is calculated as the ratio of the comparison service period to the relocation period.

[0049] Combined with the example, because the cost of each relocation in a special period of fan-shaped turning in a certain mine is quite different, the two options are compared to compare the cost of the first relocation cycle. The first relocation investment of the two locations is 35 million yuan and 22 million yuan respectively. The cost of the first relocation of the first option does not require the addition of belt conveyors and other equipment, and the relocation cost is about 25 million yuan. The cost of the second option requires the addition of belt conveyors and other equipment, and the relocation cost is about 35 million yuan.

[0050] According to the method for determining the relocation period, the relocation period of the two plans is 3 years, and the comparison period is 3 years. The relocation costs of the two plans are the sum of the first and second relocation costs. Therefore, the relocation cost of Plan 1 is 60 million yuan, and the relocation cost of Plan 2 is 57 million yuan.

[0051] S4, comparison of truck freight rates to the crushing station;

[0052] S4-1, truck haul distance to the crushing station;

[0053] The truck haul distance at different locations of the crushing station in the first year is taken as the basic haul distance. The truck haul distance will change regularly every year thereafter. It is only necessary to calculate the annual haul distance change value to obtain the haul distance situation in each year before the next relocation of the crushing station.

[0054] The calculation formula for the truck haul distance to the crushing station in year n is as follows:

[0055] D n =D1±(n-1)a (2)

[0056] Among them, D n —Truck haulage distance to the crushing station in year n, km;

[0057] D1—Truck distance to the crushing station in the first year after the system is put into use, km;

[0058] a—Annual transport distance change, km.

[0059] Based on the example, D1 of Scheme 1 is 2.85km. D1 of Scheme 2 is 3.35km. The annual distance change of the two schemes is 0.5km.

[0060] S4-2, truck freight to the crushing station;

[0061] The truck freight to the crushing station is calculated based on the crushing station's designed annual capacity, the truck's haul distance to the crushing station, the truck's unit operating cost, and the bulk density of the material. The calculation formula is as follows:

[0062] F p =∑F pn

[0063] =∑(A / R×D n ×c y ) / 10000+(A / R×n×h×c t ) / 10000

[0064] = A / R× (∑D n ×c y +n×h×c t ) / 10000 (3)

[0065] In the formula, F p —Total truck freight to the crushing station, RMB 10,000; F pn —Truck freight to the crushing station in the nth year, 10,000 yuan; A—Annual production capacity of the production system, t / a; c y —Truck unit operating cost, yuan / m 3 km; h—truck lifting height, m; n—comparison service period, years; c t —Truck unit lifting cost, yuan / m 3 ·m.

[0066] Combined with the example, in scheme 1, the truck lifting height is 30m, and the unit lifting cost h of the truck is 0.01 yuan / m 3 m, unit operating cost of coal trucks c y 2.2 yuan / m 3 km, the service period is 3 years, the total distance is 10.05 km, and the total cost is 185.2571 million yuan. In the second option, the truck is lifted to a height of 67m, the total distance is 13.05 km, and the total cost is 220.7477 million yuan.

[0067] S5, comparison of the additional costs for the insufficient capacity of existing equipment;

[0068] S5-1, the cost of purchasing a truck and labor costs to go to the crushing station;

[0069] As truck haulage distances continue to increase, the annual transportation capacity of trucks will show a downward trend year by year. To calculate the purchase cost of trucks going to the crushing station, it is necessary to calculate the annual transportation capacity of trucks based on the models and quantities of mining and transportation equipment in the existing systems of different mines and the maximum truck haulage distance during the service period compared with different plans. Then, the number of trucks required for different plans should be calculated based on the annual transportation volume. The issue of the number of trucks should not be ignored.

[0070] The calculation formula for the purchase cost of the truck and labor cost to the crushing station is as follows:

[0071] F g =(t×m / z+ m×s×p)×n (4)

[0072] In the formula, F g —The cost of purchasing trucks and labor costs for going to the crushing station, RMB 10,000; t—the cost of a single truck, RMB 10,000 / truck; m—the number of trucks purchased, units; z—the service life of the truck, years; s—the annual labor cost of the truck driver, RMB 10,000 / shift; p—the number of daily working shifts in the open-pit mine, shifts.

[0073] Based on the example, a mine currently has 20 91t trucks, and the maximum allowable transportation distance is 4km. After exceeding this transportation distance, the annual capacity of a single truck decreases, resulting in an increase in the number of trucks. In Plan 1, the truck transportation distance does not exceed 4km within three years of the system being put into operation, and there is no need to increase the truck purchase cost and labor cost. In Plan 2, the truck transportation distance will reach 4.35km in the third year. According to calculation, one more truck needs to be added. The purchase cost of a single truck is 7.2 million yuan, and the truck service life is 12 years. The purchase cost of the truck within the three-year service period is 1.8 million yuan, and the annual labor cost of the truck driver is 200,000 yuan. The open-pit mine has four daily working shifts, and the labor cost of the truck driver within the three-year service period is 2.4 million yuan. The purchase cost and labor cost of the truck to the crushing station during the service period total 4.2 million yuan.

[0074] S5-2, outsourcing costs for engineering quantity gap;

[0075] If the reduced capacity is completed by outsourcing without adding equipment, the gap in the amount of work is the difference between the annual production capacity of the production system and the number of existing equipment and the annual transportation capacity of the calculation unit. The outsourcing fee calculation formula for the gap in the amount of work is as follows:

[0076] F w =A q ×w (5)

[0077] F w —Outsourcing costs for the engineering quantity shortfall, RMB 10,000;

[0078] A q —Compare the total engineering quantity gap during the service period, ten thousand m 3 / a;

[0079] w—outsourcing unit price, yuan / m 3 .

[0080] Based on the example, the outsourcing price of coal mining in a mine is assumed to be 6 yuan / m 3 , there are 20 trucks, the gap of construction volume in the first two years of Scheme 2 is 0, and when the truck transportation distance reaches 4.35km in the third year, the annual transportation capacity is calculated to be 390,000m 3 / a, the annual production capacity of the production system is 9.0Mt / a (8.03 million m 3 / a), the total gap in engineering volume during the service period is 230,000 m 3 The outsourcing cost for the engineering quantity gap of Plan 2 is 1.38 million yuan.

[0081] The additional cost for the insufficient capacity of existing equipment is either the purchase cost of the truck to the crushing station and the labor cost or the outsourcing cost of the engineering quantity gap, or the smaller value of the two. Based on the example, the outsourcing cost of the engineering quantity gap of Plan 2, 1.38 million yuan, is less than the purchase cost of the truck to the crushing station and the labor cost of 4.2 million yuan, so the additional cost of Plan 2 for the insufficient capacity of existing equipment is 1.38 million yuan, and Plan 1 is 0 yuan.

[0082] S6, comparison of belt conveyor operating costs;

[0083] The operating cost of the belt conveyor is calculated based on the length of the belt conveyor, the annual production capacity of the production system, the unit transportation cost of the belt conveyor and the comparative service period. The calculation formula is as follows:

[0084] F J = A×L×C j ×n / 10000 (6)

[0085] F j —Belt conveyor operating costs, 10,000 yuan;

[0086] L—belt conveyor length, km;

[0087] C j —Unit transportation cost of belt conveyor, yuan / t·km.

[0088] Based on the example, the length of the belt conveyor in Plan 1 is 1.8 km, and the length of the belt conveyor in Plan 2 is 1 km. The unit transportation cost of the belt conveyor is 0.3 yuan / t·km. The operating cost of the belt conveyor in Plan 1 is 14.58 million yuan, and the operating cost of the belt conveyor in Plan 2 is 8.10 million yuan.

[0089] S7, comparison of costs of grade separation bridges and culverts;

[0090] The forms of grade separation between different modes of transportation in open-pit mines are divided into two types: the intersection between different belt conveyors and the intersection between trucks and belt conveyors. Under normal circumstances, the intersection method adopts the form of a trestle, which can meet the intersection between different belt conveyors and the intersection between the truck and the belt conveyor with the belt conveyor on top and the truck below. Since the cost of the trestles is included in the relocation investment, the grade separation bridges and culverts listed separately here do not refer to trestle-type bridges and culverts, but to bridges and culverts suitable for heavy-loaded trucks to cross belt conveyors, represented by removable steel bridges, corrugated steel arch culvert structures, and reinforced concrete tunnel bridge structures, or large-slope continuous transportation systems.

[0091] The calculation formula for the cost of grade separation bridges and culverts is as follows:

[0092] F q = e / k×n (7)

[0093] In the formula, F q —cost of grade separation bridge and culvert, ten thousand yuan; e—one-time cost of grade separation bridge and culvert, ten thousand yuan; k—service life of bridge and culvert, years.

[0094] It should be noted that for reusable removable steel bridges, k is the service life of the equipment or the remaining service life of the open-pit mine. For corrugated steel arch culvert structures and reinforced concrete tunnel bridge structures that cannot be reused or have a low reuse rate, new ones must be built each time they are relocated, and the service life of the bridge and culvert k is the relocation period.

[0095] Combined with the example, Scheme 1 requires the new No. 2 crushing system to add a bridge culvert across three belt conveyors. Removable steel structure bridges, reinforced concrete tunnel bridges, and corrugated steel arch bridges can be used. The one-time costs of the three types of three-dimensional cross bridges and culverts are 22 million yuan, 15.8 million yuan, and 13.7 million yuan respectively. Since the steel bridge can be reused, although the single cost is high, the system is expected to be relocated four times during the life of the open-pit mine. According to the lowest total cost, the steel bridge method is finally recommended. The one-time cost of the steel bridge is 22 million yuan. Since the remaining service life of the open-pit mine is 13 years, the service life is calculated based on 13 years, compared with the cross cost of 5.08 million yuan during the service period. Scheme 2 The crushing station is arranged outside the machine road and does not need to add a bridge culvert across the belt conveyor.

[0096] S8, other aspects affecting cost comparison;

[0097] S8-1, other system truck detour fees;

[0098] In addition to considering various costs of the system itself, it is also necessary to consider the detour costs of trucks in other systems caused by the semi-mobile crushing station or belt conveyor in this system, and the impact of system pressure on the costs of open-pit mining, transportation, and drainage, including the cost changes of other stripping and coal mining systems affected by the system in the open-pit mine. This part of the cost is calculated based on the annual transportation volume affected by the detour, the increased transportation distance, the unit operating cost, and the comparative service period. The calculation formula is as follows:

[0099] F r = Y×y×c w ×n / 10000 (8)

[0100] In the formula, F r —Other system truck detour costs, RMB 10,000; Y—Annual transportation volume affected by detour, m 3 / a; y—increased transport distance, km. w —Unit operating cost of trucks in the affected area, RMB / m 3 km.

[0101] Combined with the example, in the first scheme, after the new No. 2 crushing system is put into use, the lifting belt conveyor and the belt conveyors of the two original systems of the open-pit mine are arranged on the same track. After the No. 2 crushing system is put into use, the open-pit mine single-bucket truck stripping transportation system and the No. 1 coal mining crushing system will not change. Trucks will still be transported through the original cross-belt conveyor bridge culvert, so there will be no impact on other systems. In the second scheme, the crushing station is located at the upper part, and the original trucks need to bypass the new No. 2 crushing system crushing station for transportation. At the same time, due to the location of the crushing station, the existing span 602 / 702 belt conveyor bridge culvert is moved eastward, resulting in the outsourcing of 26 million m 3 / a The stripping volume increases the transportation distance by 0.2km due to bypassing the crushing station. The unit operating cost of the outsourced truck is 1 yuan / m 3 ·km, compared with the cost of detours during the service period of RMB 15.6 million.

[0102] S8-2, additional earthwork costs for other systems;

[0103] In addition to the earthwork volume of this system included in the relocation fee, there may also be additional invalid engineering volume such as expansion engineering volume or other auxiliary engineering volume caused by the existing space not being able to accommodate the crushing station. This cost will also affect the total cost. The calculation formula is as follows:

[0104] F t =A t ×b (9)

[0105] In the formula, F t —Extra earthwork costs for other systems, RMB 10,000; A t — Additional earthwork volume of other systems, 10,000 m 3 / a;

[0106] b—Unit price of earthwork, yuan / m 3 .

[0107] Based on the example, both plans for a mine's new No. 2 crushing system do not incur additional earthwork costs for other systems, so this cost is not included in the total cost.

[0108] 9Total cost comparison;

[0109] The total cost is the sum of the total cost of relocating the crushing station, the truck freight to the crushing station, the additional cost of the insufficient capacity of the existing equipment, the operation cost of the belt conveyor, the cost of the grade-separated bridge and culvert, the detour cost of other system trucks, and the additional earthwork cost of other systems during the comparison service period. The economic analysis and evaluation model of different crushing station locations was constructed based on the principle of minimizing the total cost.

[0110] F z =F y +F p +F b +F j +F q +F r +F t (10)

[0111] Combined with the case, the cost calculation of the two plans during the service period is compared in Table 2.

[0112] Table 2 Comparison of the cost calculation table of each plan during the service period

[0113]

[0114] Through the constructed economic analysis and evaluation model, it can be calculated that Plan 1 saves 37.91 million yuan compared with Plan 2 during a comparative service period. Plan 1's crushing station is more economical to be arranged under the pit. A more economical crushing station location plan was determined, which improved the economic benefits of the mine.

[0115] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for determining the economic feasibility of different crushing station locations, characterized in that: The total cost of relocating the crushing station, the truck freight to the crushing station, the additional cost of insufficient existing equipment capacity, the operating cost of the belt conveyor, the cost of the grade separation bridge and culvert, the truck detour cost of other systems and the additional earthwork cost of other systems during the service period are obtained, and an economic analysis and evaluation model is established. The model constrains the total cost to be minimum, obtains different plans for the location of the crushing station, compares the total cost of each plan, and then constructs it according to the plan with the lowest cost.

2. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The method to obtain the total cost of relocation of the crushing station during the service period is: the sum of the first relocation cost and the relocation costs of each relocation during the service period, the formula is: F y =∑ F yn = F y1 + F y2 +…+ F yn (1) In the formula, F y —Total relocation cost, RMB 10,000; F y1 —First relocation cost, 10,000 yuan; F y2 - Second relocation fee, RMB 10,000; F yn —The cost of the nth relocation, ten thousand yuan.

3. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The method for determining the truck freight to the crushing station is: The calculation is based on the crushing station's designed annual capacity, the truck's haul distance to the crushing station, the truck's unit operating cost, and the material's bulk density. The calculation formula is as follows: F p =∑F pn =∑(A / R×D n ×c y ) / 10000+(A / R×n×h×c t ) / 10000 = A / R×(∑D n ×c y +n×h×c t ) / 10000 (3) In the formula, F p —Total truck freight to the crushing station, RMB 10,000; F pn —Truck freight to the crushing station in the nth year, 10,000 yuan; A—Annual production capacity of the production system, t / a; c y —Truck unit operating cost, yuan / m 3 km; h—truck lifting height, m; n—comparison service period, years; c t —Truck unit lifting cost, yuan / m 3 ·m.

4. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The additional costs for the insufficient capacity of the existing equipment refer to: the purchase cost of the truck to the crushing station and the labor cost and the outsourcing cost of the engineering quantity gap.

5. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The method for determining the operating cost of the belt conveyor is: based on the length of the belt conveyor, the annual production capacity of the production system, the unit transportation cost of the belt conveyor and the comparative service period, the calculation formula is as follows: F j = A×L×C j ×n / 10000 (6) In the formula, F j —Belt conveyor operation cost, RMB 10,000; L—belt conveyor length, km; C j —Unit transportation cost of belt conveyor, Yuan / t·km.

6. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The formula for determining the cost of the grade separation bridge and culvert is: F q = e / k×n (7) In the formula, F q —cost of grade separation bridge and culvert, ten thousand yuan; e—one-time cost of grade separation bridge and culvert, ten thousand yuan; k—service life of bridge and culvert, years.

7. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The formula for determining the other system truck detour fee is: F r = Y×y×c w ×n / 10000 (8) In the formula, F r —Other system truck detour costs, RMB 10,000; Y—Annual transportation volume affected by detour, m 3 / a; y—increased transport distance, km. w —Unit operating cost of trucks in the affected area, RMB / m 3 km.

8. A method for determining the economic efficiency of different crushing station locations as claimed in claim 1, characterized in that: The calculation formula for determining the additional earthwork costs for the other systems is as follows: F t =A t ×b (9) In the formula, F t —Extra earthwork costs for other systems, RMB 10,000; A t — Additional earthwork volume of other systems, 10,000 m 3 / a; b—unit price of earthwork, yuan / m 3 .

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