Vehicle-shovel ratio calculation and grouping method for strip mine dispatching system

Abstract

The invention discloses a car-shovel ratio calculation and grouping method for a strip mine dispatching system, and particularly relates to the field of mining, and the method comprises the steps: calculating each material pile yield index and a corresponding unloading point through formulating a yield plan and an automatic ore blending model; establishing material pile-excavator-truck-unloading point groups, allocating one excavator device to each group, selecting truck models according to the spoon capacity ratio, preferentially meeting the groups with small requirements, and calculating the extra production capacity requirements of each group; setting a motorized truck group and calculating a preferable truck model of the motorized truck group; judging the number of the optimized truck models of the maneuvering group and the distribution demand of the maneuvering group; after the grouping task is completed, class production scheduling operation is carried out, and the truck fixedly goes back and forth between the in-group excavator and the in-group unloading point to execute the transportation task; and the truck equipment in the maneuvering group takes the trip as a unit to execute the truck transportation task of any material pile-excavator-truck-unloading point group bound by the maneuvering group.

Description

Technical Field

[0001] The present invention relates to the technical field of mining, and more particularly to a vehicle-to-shovel ratio calculation and grouping method for an open-pit mine scheduling system. Background Art

[0002] Open-pit mine managers usually formulate annual, quarterly and monthly production plans based on the assessment of mine resources, equipment capacity and market demand, and formulate daily production plans and shift production plans according to the monthly plan and recent production status. The shift production plan usually includes production task information for specific equipment and facilities such as stockpiles, excavators, trucks, and unloading points. In addition, in the non-ferrous mining industry, due to the large fluctuations in ore grade and the complex composition of ore, in order to comprehensively utilize ore resources and improve mineral processing efficiency, it is usually necessary to carry out ore blending when formulating shift production plans, that is, to mix ores of different grades and compositions in a certain proportion. Specifically, it is necessary to clarify the output and unloading point of each stockpile, and to direct transport vehicles loaded with ores of different grades to unload in proportion during production scheduling, so that ores of different grades are fully mixed in proportion at the unloading point;

[0003] After defining the production objectives, production equipment needs to be allocated and dispatched. With the advancement of technology, more and more open-pit mines are beginning to introduce truck dispatching systems, and some mining companies have already automated some or all of their production dispatching. The open-pit mine truck dispatching system equips each truck and excavator with a mobile positioning module and on-board terminal device, allowing the dispatch center to obtain equipment location information, analyze the equipment's operating status and operation progress, and quickly issue dispatch instructions.

[0004] However, in practice, this system still has some shortcomings. For example, the current open-pit mine truck dispatching system uses a fixed-shovel dispatching model, which still relies on manual experience to select truck and excavator groups. This manual allocation of trucks may result in too many or too few trucks being assigned to excavators, leading to long queues for trucks or idle excavators, resulting in low utilization of both excavators and trucks. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a method for calculating and grouping vehicle-to-shovel ratios in an open-pit mine scheduling system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Step A1: Develop annual, quarterly, and monthly production plans, and formulate ore allocation plans for each shift;

[0008] Step A2: Create a "stock pile - excavator - truck - unloading point" grouping and select one excavator from the available excavators for each "stock pile - excavator - truck - unloading point" grouping;

[0009] Step A3: Calculate the preferred truck model and select a truck from the truck resources to be allocated for the "stockpile-excavator-truck-unloading point" grouping.

[0010] Step A4: Determine the number of preferred truck models and grouping requirements;

[0011] Step A5: Calculate the additional production capacity requirements for each group;

[0012] Step A6: Set the motor truck group and calculate the preferred truck model of the motor truck group;

[0013] Step A7: Calculate the number of trucks required for the group;

[0014] Step A8: Determine the number of the preferred truck models of the mobile group and the allocation requirements of the mobile group;

[0015] Step A9: After completing the grouping task, perform the shift production scheduling operation.

[0016] Preferably, in step A1, future ore demand is predicted based on market demand and contract requirements, the mine's exploitable reserves and grade are assessed, and annual, quarterly, and monthly production targets are formulated taking into account economic benefits and production capacity;

[0017] After setting annual, quarterly, and monthly production targets, select the n stockpiles planned for mining in the current shift and use the automatic ore allocation model to develop the production indicators and corresponding unloading points for each stockpile in the current shift.

[0018] Preferably, in step A2, n piles are divided into b groups of "pile-excavator-truck-unloading point", where n=b. The information of each group includes: pile, excavator, truck, unloading point and output. In each group, the number of piles, excavators and unloading points is 1, and the number of trucks is a. The numbers of the n piles and their corresponding unloading points in step A1 are filled into each group. The output index of each pile is the output of the corresponding group. The output of the i-th group is expressed as P i , where i≤n, unit is tons.

[0019] Preferably, in step A3, the truck equipment includes the truck model and the number of trucks, wherein trucks of the same model are assigned to the same group; the truck model of each group is determined by the scoop capacity ratio, and the scoop capacity ratio is calculated as follows:

[0020] Among them, Z represents the scoop capacity ratio, T represents the compartment volume, and E represents the bucket volume;

[0021] If the calculated scoop ratio among the truck resources to be allocated is an integer, the allocation is performed directly. If the calculated scoop ratio among the truck resources to be allocated is not an integer, the truck model with the largest number among the truck resources to be allocated is preferentially selected for allocation. Based on this principle, the preferred truck model M of each group is selected from the available truck resources to be allocated. i .

[0022] Preferably, in step A4, if the number of available trucks of various models is sufficient to meet the allocation requirements of all groups, then the truck models M of each group are selected. i and the number of trucks t i整 Assign trucks to each group, and then go to step A5; if some preferred truck models are insufficient and no other models of truck equipment are available, it means that the existing truck resources cannot meet the task requirements, so jump to step A1 and re-formulate the shift production plan; if some preferred truck models are insufficient and other models of truck equipment are available, then allocate the existing trucks to the group according to the preferred model at this time. For groups with repeated preferred truck models, give priority to the group with a smaller number of truck requirements, and then go to the next step.

[0023] Preferably, in step A6, in addition to the b “material pile-excavator-truck-unloading point” groups mentioned above, m mobile truck groups (m≤n) are set up according to the on-site conditions, referred to as mobile groups. Each mobile group contains c truck equipment, and each mobile group is bound to b “material pile-excavator-truck-unloading point” groups. The “material pile-excavator-truck-unloading point” groups bound to each mobile group are not repeated.

[0024] The additional production capacity demand P of the k “stock pile-excavator-truck-unloading point” groups bound to the jth (j≤m) mobile group i额 Sort by large to small, where P i额 The largest group is recorded as the max group. Determine the last allocated M in the max group. max Is the number of trucks to be allocated zero? max If the number of available truck models is not zero, then the truck model is selected as the preferred truck model for the jth mobile group; if M max If the number of available truck models is 0, then group the k “piles-excavators-trucks-unloading points” into P i额 The next largest group is recorded as the max group, and the above judgment operation is repeated. If there are no optional resources to be allocated for the last assigned truck model of all k "piles - excavators - trucks - unloading points" groups, then the model with the largest number of available available truck resources is selected and made the preferred truck model of the jth mobile group, which is recorded as M. max .

[0025] Preferably, in step A7, the decimal number of vehicles required for the k “stock pile-excavator-truck-unloading point” groups bound to the j-th mobile group is converted into the number of vehicles required for M max The required number of trucks of each model is summed up to get the required number of trucks for the j-th mobile group.

[0026] Preferably, in step A8, if the number of available trucks of various models is sufficient to meet the allocation requirements of all mobile groups, then the number of truck models M of each group is max and the actual number of trucks required t′ j Assign trucks to each group and then proceed to the next step; if some mobile groups do not have enough preferred truck models and no other models of truck equipment are available, it means that the existing truck resource transportation capacity cannot meet the task requirements, then jump to step A1 and re-formulate the class production plan; if some mobile groups do not have enough preferred truck models and other models of truck equipment are available, then allocate existing trucks to the group according to the preferred truck models at this time. For mobile groups with repeated preferred truck models, give priority to the mobile group with a smaller number of truck requirements, then jump to step A6 and continue to select other models of trucks.

[0027] Preferably, in step A9, after completing the "material pile-excavator-truck-unloading point" grouping and the setting of the mobile group, the shift production scheduling operation is carried out, and the truck equipment located in the "material pile-excavator-truck-unloading point" group, according to the fixed shovel dispatching operation mode, fixedly travels back and forth between the excavator in the group and the unloading point in the group to perform the transportation task; and the truck equipment located in the mobile group performs the truck transportation task of any "material pile-excavator-truck-unloading point" group bound to the mobile group in units of trips, and the production scheduling algorithm is used to calculate and determine which group the truck in the mobile group belongs to.

[0028] Technical effects and advantages of the present invention:

[0029] 1. By establishing a mobile group in addition to the "stockpile-excavator-truck-unloading point" grouping, the present invention enables the system to quickly dispatch equipment to meet temporary needs and emergencies that arise during the production process. When production demand changes dynamically, it can quickly maneuver, reducing the frequency of manual intervention in scheduling and ensuring production continuity and efficiency.

[0030] 2. The present invention divides the calculation result of the required number of trucks in the "material pile-excavator-truck-unloading point" group into an integer part and a decimal part, and incorporates the required number of trucks in the integer part into the fixed shovel dispatch group, and the required number of trucks in the decimal part into the mobile group, thereby greatly reducing the waste of truck resources caused by directly rounding up the traditional required number of trucks calculation result. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the method of the present invention.

[0032] Figure 2 It is a partial method flow diagram of the present invention.

[0033] Figure 3 It is a partial method flow diagram of the present invention. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1 As shown, the present invention provides a method for calculating and grouping the vehicle-to-shovel ratio in an open-pit mine scheduling system, which is as follows:

[0036] Step A1: Develop annual, quarterly, and monthly production plans, and formulate ore allocation plans for each shift;

[0037] In step A1, future ore demand is forecast based on market demand and contract requirements, the mine's recoverable reserves and grade are assessed, and annual, quarterly, and monthly production targets are set taking into account both economic benefits and production capacity.

[0038] After setting annual, quarterly, and monthly production targets, select the n stockpiles planned for mining during the current shift and use the automatic ore allocation model to develop the production targets and corresponding unloading points for each stockpile during the current shift.

[0039] Among them, the automatic ore matching model can be used to calculate the ore matching results, and the mining volume of each stockpile can be used as the decision variable. The function is established with the goal of minimizing the mining cost, and constraints such as the ore grade of each stockpile, the ore reserves of each stockpile, the processing volume of each unloading point and the target grade range of each unloading point are set. Then, the linear or nonlinear programming model is used to solve the problem, and finally the production index of each stockpile and its corresponding unloading target point are obtained.

[0040] Step A2: Create a "stock pile - excavator - truck - unloading point" grouping and select one excavator from the available excavators for each "stock pile - excavator - truck - unloading point" grouping;

[0041] In step A2, n piles are divided into b groups of "pile-excavator-truck-unloading point", where n = b. The information of each group includes: pile, excavator, truck, unloading point and output. In each group, the number of piles, excavators and unloading points is 1, and the number of trucks is a. The numbers of the n piles and their corresponding unloading points in step A1 are filled into each group. The output index of each pile is the output of the corresponding group. The output of group i is expressed as P i , where i≤n, unit is tons;

[0042] Assume that the shift production capacity of the i-th group of excavators is C i , in tons, and C i ≥P i , and C i With P i The specific method for calculating the difference is:

[0043] D i =C i -P i , where D i Expressed as the difference between shift capacity and output, C i It is expressed as the shift production capacity of the i-th group of excavators, P i Expressed as the output of group i;

[0044] The smaller the difference between the production capacity and output of a class, the better. The minimum is the total result of the excavator allocation;

[0045] Step A3: Calculate the preferred truck model and select a truck from the truck resources to be allocated for the "stockpile-excavator-truck-unloading point" grouping.

[0046] In step A3, the truck equipment includes the truck model and the number of trucks, wherein trucks of the same model are assigned to the same group; the truck model of each group is determined by the scoop capacity ratio, and the scoop capacity ratio is calculated as follows:

[0047] Among them, Z represents the scoop capacity ratio, T represents the compartment volume, and E represents the bucket volume;

[0048] If the calculated scoop ratio among the truck resources to be allocated is an integer, the allocation is performed directly. If the calculated scoop ratio among the truck resources to be allocated is not an integer, the truck model with the largest number among the truck resources to be allocated is preferentially selected for allocation. Based on this principle, the preferred truck model M of each group is selected from the available truck resources to be allocated. i .

[0049] Preferred Truck Model M i The calculation method for the corresponding number of required vehicles is as follows:

[0050] Among them, t i It is represented by the required number of Mi trucks in group i, λ is the congestion coefficient of the road between the pile and the unloading point in this group, and λ≥1; S i It is expressed as the round trip mileage between the group stockpile and the unloading point, in kilometers; P' i It is expressed as the total production capacity of the assigned trucks of group i, in tons. When the number of trucks required for this group is calculated for the first time, P' i =0; G represents the production operation time of a shift, in hours; L i Indicated as M i The fully loaded weight of the model truck in tons, V i is the average transport speed of trucks in kilometers per hour;

[0051] The result of calculating the number of trucks required is t i The integer and decimal values are split and recorded as the integer number of cars required t i整 The number of cars required for the sum of decimals is t i小 , and t i =t i整 +t i小 , and t i整 Let be the number of trucks in each group;

[0052] Step A4: Determine the number of preferred truck models and grouping requirements;

[0053] In step A4, if the number of available trucks of various models is sufficient to meet the allocation requirements of all groups, then the number of truck models M of each group is i and the number of trucks t i整 Assign trucks to each group and proceed to step A5. If some preferred truck models are insufficient and no other models are available, indicating that the existing truck resources cannot meet the task requirements, jump to step A1 and re-formulate the shift production plan. If some preferred truck models are insufficient and other models are available, allocate existing trucks to groups according to the current preferred model. For groups with duplicate preferred truck models, prioritize the group with the smaller truck requirement and proceed to the next step.

[0054] If there are insufficient trucks, let P" i =P' i , calculate the total production capacity of the assigned trucks, the calculation method is as follows:

[0055] Among them, P' i It is the shift production capacity of the assigned trucks of group i, in tons; t' i Represented as the M allocated to group i iNumber of truck models; P" i It is expressed as the total shift production capacity of other types of trucks previously assigned to this group, in tons;

[0056] Return to step A3 and select other existing truck models for allocation to the group with insufficient trucks.

[0057] Step A5: Calculate the additional production capacity requirements for each group;

[0058] In step A5, the additional production capacity requirement P required for each "stockpile-excavator-truck-unloading point" group in addition to the trucks allocated according to the above method is calculated. i额 The specific calculation method is:

[0059] P i额 =t i小 L i , where t i小 Represented as the last calculated M of group i i The number of trucks required is the decimal number of trucks required; L i Represents M as the last selection of group i i The fully laden weight of the model truck in tons;

[0060] Step A6: Set the motor truck group and calculate the preferred truck model of the motor truck group;

[0061] In step A6, in addition to the b "stock pile-excavator-truck-unloading point" groups mentioned above, m mobile truck groups (m≤n) are established according to the site conditions. Each mobile group contains c truck equipment, and each mobile group is bound to b "stock pile-excavator-truck-unloading point" groups. The "stock pile-excavator-truck-unloading point" groups bound to each mobile group are unique.

[0062] The additional production capacity demand P of the k “stock pile-excavator-truck-unloading point” groups bound to the jth (j≤m) mobile group i额 Sort by large to small, where P i额 The largest group is recorded as the max group. Determine the last allocated M in the max group. max Is the number of trucks to be allocated zero? max If the number of available truck models is not zero, then the truck model is selected as the preferred truck model for the jth mobile group; if M max If the number of available truck models is 0, then group the k “piles-excavators-trucks-unloading points” into P i额The next largest group is recorded as the max group, and the above judgment operation is repeated. If there are no optional resources to be allocated for the last assigned truck model of all k "piles - excavators - trucks - unloading points" groups, then the model with the largest number of available available truck resources is selected and made the preferred truck model of the jth mobile group, which is recorded as M. max .

[0063] Step A7: Calculate the number of trucks required for the group;

[0064] In step A7, the decimal number of vehicles required for the k “piles-excavators-trucks-unloading points” groups bound to the j-th mobile group is converted into the number of vehicles required for M max The required number of trucks of each model is summed up to get the required number of trucks for the j-th mobile group:

[0065] Among them, t j Expressed as the jth maneuver group for M max The required number of trucks of the model; L j Indicated as M max The fully loaded weight of the model truck, in tons; L i It represents the M finally allocated to the i-th group among the k groups mentioned above. i The fully loaded weight of the model truck, in tons; t i小 It is expressed as the i-th group among the above k groups for M i The decimal number of trucks required; s represents the number of truck types in the mobile group. When calculating for the first time, s = 0; L x Indicates that there is M in the mobile group x The fully loaded weight of the model truck, in tons; t x Indicates that there is M in the mobile group x Number of truck models;

[0066] The result of the above formula is t j If there is a decimal, t j Round up to get the actual number of trucks required for the j-th mobile group t' j ,and

[0067] Step A8: Determine the number of the preferred truck models of the mobile group and the allocation requirements of the mobile group;

[0068] In the step A8, if the number of available trucks of various models is sufficient to meet the allocation requirements of all mobile groups, then the number of truck models M in each group is max and the actual number of trucks required t′ jAssign trucks to each group and then proceed to the next step; if some mobile groups do not have enough preferred truck models and no other models of truck equipment are available, it means that the existing truck resource transportation capacity cannot meet the task requirements, then jump to step A1 and re-formulate the class production plan; if some mobile groups do not have enough preferred truck models and other models of truck equipment are available, then allocate existing trucks to the group according to the preferred truck models at this time. For mobile groups with repeated preferred truck models, give priority to the mobile group with a smaller number of truck requirements, then jump to step A6 and continue to select other models of trucks.

[0069] Step A9: After completing the grouping task, perform the shift production scheduling operation;

[0070] In step A9, after the "pile-excavator-truck-unloading point" grouping and the setting of the mobile group are completed, the shift production scheduling operation is carried out. The truck equipment in the "pile-excavator-truck-unloading point" grouping is fixedly transported back and forth between the excavators in the group and the unloading point in the group according to the fixed shovel dispatching operation mode to perform transportation tasks; and the truck equipment in the mobile grouping is carried out on a trip basis for any truck transportation task of the "pile-excavator-truck-unloading point" grouping bound to the mobile grouping. The production scheduling algorithm is used to calculate and determine which trucks in the mobile grouping perform the transportation tasks of the grouping.

[0071] The production scheduling algorithm dynamically evaluates the production task progress of each "stockpile-excavator-truck-unloading point" group in real time, and ranks the k "stockpile-excavator-truck-unloading point" groups bound to the jth mobile group from lowest to highest production task progress. This ranking is updated in real time as production progresses. For Truck A in the jth mobile group, before its first production task or after completing a "loading-unloading" transport task, the scheduling algorithm automatically assigns the transport task for the "stockpile-excavator-truck-unloading point" group with the lowest current production task progress to Truck A. Upon receiving the production task, Truck A immediately proceeds to the excavator in that group to load, then to the unloading point in that group to unload. After unloading, it waits for the scheduling algorithm to assign it a new production task.

[0072] Example 1

[0073] An open-pit mine has two mining teams, Team A and Team B, each with its own excavator and truck equipment. To facilitate project settlement, the two teams' equipment cannot be mixed. The mine has three unloading points, numbered Unloading Point 1, Unloading Point 2, and Unloading Point 3. The mine operates in two shifts: day and night, each lasting eight hours.

[0074] Construction Team A and Construction Team B have two truck models, Model A and Model B respectively. The volume of Model A truck is 40m 3, full load weight is 100t; Model B truck compartment volume is 44m 3 , with a full load weight of 110t.

[0075] Engineering Team A has 10 Model A trucks numbered 1 through 10, and 10 Model B trucks numbered 11 through 20. Engineering Team B has 10 Model A trucks numbered 21 through 30, and 10 Model B trucks numbered 31 through 40. The average speed of all trucks in the mine is 15 km / h. The following describes a production scheduling plan for a specific shift:

[0076] 1. Develop annual, quarterly and monthly production plans:

[0077] Based on market demand forecasts and contract requirements, the mine's recoverable reserves and grade were assessed, and reasonable annual, quarterly, and monthly production targets were formulated, taking into account both economic benefits and production capacity. The mine's annual production target is 6.3 million tons, with a quarterly production target of 1.575 million tons and a monthly production target of 525,000 tons.

[0078] 2. Develop a production and ore allocation plan for each shift:

[0079] Based on the monthly production target, the total production target for this shift is set at 17,500 tons. Seven stockpiles are selected for mining during the current shift, numbered 1-7. Using either an automatic or manual ore allocation model, a production target and corresponding unloading point are established for each stockpile. The round-trip mileage from each stockpile to the unloading point is determined based on mine road network data, and the congestion coefficient of each road section is determined based on experience:

[0080] The production index of stockpile 1 is 2500t. The material is unloaded at unloading point 1. The round trip distance is 25.6km. The congestion coefficient of the road is λ = 1.

[0081] The production index of stockpile 2 is 2800t. The material is unloaded at unloading point 2. The round trip distance is 16.8km. The congestion coefficient of the road is λ = 1.

[0082] The production index of stockpile 3 is 2200t. The material is unloaded to unloading point 1. The round trip distance is 20.8km. The congestion coefficient of the road is λ = 1.1.

[0083] The production index of stockpile 4 is 2400t. The material is unloaded at unloading point 2. The round trip distance is 28.8km. The congestion coefficient of the road is λ = 1.

[0084] The production index of stockpile 5 is 2600t. The material is unloaded at unloading point 3. The round trip distance is 14.4km. The congestion coefficient of the road is λ = 1.2.

[0085] The production index of stockpile 6 is 2700t. The material is unloaded at unloading point 3. The round trip distance is 19.2km. The congestion coefficient of the road is λ = 1.

[0086] The production index of stockpile 7 is 2300t. The material is unloaded at unloading point 3. The round trip distance is 27.2km. The congestion coefficient of the road is λ = 1.

[0087] Taking into account the existence of two engineering teams, the production tasks of material piles 1, 2, 3, and 4 are assigned to engineering team A, and the production tasks of material piles 5, 6, and 7 are assigned to engineering team B.

[0088] 3. Set up “Pile-Excavator-Truck-Unloading Point” grouping:

[0089] Based on the results of step 2, seven groups were established, each including a pile, excavator, truck, unloading point, and output. The pile numbers, output indicators, and corresponding unloading points were assigned to each group, as shown in Table 1.

[0090] Output / t stockpile Excavator truck Unloading point 2500 Pile 1 Unloading point 1 2800 Pile 2 Unloading point 2 2200 Pile 3 Unloading point 1 2400 Pile 4 Unloading point 2 2600 Pile 5 Unloading point 3 2700 Pile 6 Unloading point 3 2300 Pile 7 Unloading point 3

[0091] Table 1 is a schematic diagram of the "pile-excavator-truck-unloading point" grouping

[0092] 4. Allocate excavator equipment:

[0093] Select one excavator from the available excavators of Engineering Team A and Engineering Team B for each group, ensuring that the shift production capacity of each group of excavators is greater than or equal to the group output, and excavators with shift production capacity close to the group output are allocated first.

[0094] The mine currently has 9 excavators, and their status is as follows:

[0095] Excavator 1 has a shift production capacity of 2500t and a bucket capacity of 5.0m 3 , belongs to Engineering Team A;

[0096] Excavator 2's shift production capacity is 3000t, with a bucket capacity of 6.0m 3 , belongs to Engineering Team A;

[0097] Excavator 3's shift production capacity is 2300t, with a bucket capacity of 4.6m 3 , belongs to Engineering Team A;

[0098] Excavator 4's shift production capacity is 2400t, with a bucket capacity of 4.8m 3 , belongs to Engineering Team A;

[0099] Excavator 5's shift production capacity is 2800t, with a bucket capacity of 5.6m 3 , belongs to Engineering Team B;

[0100] Excavator 6's production capacity is 2800t, with a bucket capacity of 5.6m3 , belongs to Engineering Team B;

[0101] Excavator 7's shift production capacity is 2500t, with a bucket capacity of 5.0m 3 , belongs to Engineering Team B;

[0102] Excavator 8's shift production capacity is 2200t, with a bucket capacity of 4.4m 3 , belongs to Engineering Team B;

[0103] Excavator 9's shift production capacity is 3200t, with a bucket capacity of 6.4m 3 , belongs to Engineering Team A;

[0104] According to the above optimal conditions, the allocation results of the excavator equipment are shown in Table 2. Excavators 1, 2, 3, and 4 are grouped with piles 1, 2, 3, and 4 respectively, and excavators 5, 6, and 7 are grouped with piles 5, 6, and 7 respectively.

[0105] Output / t stockpile Excavator truck Unloading point 2500 Pile 1 Excavator 1 Unloading point 1 2800 Pile 2 Excavator 2 Unloading point 2 2200 Pile 3 Excavator 3 Unloading point 1 2400 Pile 4 Excavator 4 Unloading point 2 2600 Pile 5 Excavator 5 Unloading point 3 2700 Pile 6 Excavator 6 Unloading point 3 2300 Pile 7 Excavator 7 Unloading point 3

[0106] Table 2 is a schematic diagram of the results of allocating excavators

[0107] 5. Calculate the preferred truck model:

[0108] The truck model of each group is determined based on the scoop capacity ratio T / E. Truck models with an integer scoop capacity ratio T / E are given priority, and trucks of the same model are assigned to the same group. Secondly, truck models with sufficient quantity are given priority.

[0109] Calculating the capacity ratios reveals that the capacity ratio of Model A trucks to Excavators 1 and 7 is 10. The capacity ratios of all other excavators to trucks are non-integers. Since Excavator 1 and Excavator 7 belong to Team A and Team B, respectively, Team A's Model A truck is prioritized for Excavator 1, while Team B's Model A truck is prioritized for Excavator 7. For the remaining trucks in the same group, the more common Model B truck is prioritized. The truck model selection results are shown in Table 3.

[0110] Output / t stockpile Excavator truck Unloading point 2500 Pile 1 Excavator 1 Model A Unloading point 1 2800 Pile 2 Excavator 2 Model B Unloading point 2 2200 Pile 3 Excavator 3 Model B Unloading point 1 2400 Pile 4 Excavator 4 Model B Unloading point 2 2600 Pile 5 Excavator 5 Model B Unloading point 3 2700 Pile 6 Excavator 6 Model B Unloading point 3 2300 Pile 7 Excavator 7 Model A Unloading point 3

[0111] Table 3 is a schematic table of the results of selecting truck models

[0112] 6. Calculate the number of trucks required:

[0113] The number of trucks required for each group is calculated according to the following formula, and divided into integer and decimal numbers (current P′ i =0):

[0114]

[0115] Where:

[0116] t i is M in group i i The required number of trucks of the model;

[0117] λ is the congestion coefficient of the road between the group pile and the unloading point, λ≥1;

[0118] S i The round-trip mileage between the group stockpile and the unloading point, in kilometers (km);

[0119] P' i is the total production capacity of the assigned trucks of group i, in tons (t). When the number of trucks required for this group is first calculated, P' i =0;

[0120] G is the production operation time of a shift, in hours (h);

[0121] L i M i The fully loaded weight of the model truck, in tons (t);

[0122] V i is the average truck transport speed in kilometers per hour (km / h).

[0123] The calculation results are as follows:

[0124] t1=5.33,t 1整 =5,t 1小 =0.33;

[0125] t2=3.56,t 2整 =3,t 2小 =0.56;

[0126] t3=3.81,t 3整 =3,t 3小 =0.81;

[0127] t4=5.24,t 4整 =5,t 4小 =0.24;

[0128] t5=3.40,t 5整 =3,t 5小 =0.40;

[0129] t6=3.92,t 6整 =3,t 6小 =0.92;

[0130] t7=5.21,t 7整 =5,t 7小 =0.21;

[0131] 7. Determine whether the number of preferred truck models is sufficient:

[0132] Based on the required vehicle count calculation above, this plan requires Team A to deploy 5 Model A trucks and 11 Model B trucks, and Team B to deploy 5 Model A trucks and 6 Model B trucks. The result is: Team A has insufficient Model B trucks, but it still has some available Model A trucks. Therefore, Team B can meet the demand.

[0133] The truck grouping results are shown in Table 4. Following the principle of "giving priority to groups with smaller truck requirements," Team A's 10 Model B trucks are allocated to Groups 2 and 3, and the remaining four Model B trucks are assigned to Group 4. This means that Group 4 will only have four Model B trucks for the time being. Then, proceed to the next step.

[0134] Output / t stockpile Excavator truck Unloading point 2500 Pile 1 Excavator 1 Truck 1 Truck 2 Truck 3 Truck 4 Truck 5 Unloading point 1 2800 Pile 2 Excavator 2 Truck 11 Truck 12 Truck 13 Unloading point 2 2200 Pile 3 Excavator 3 Truck 14 Truck 15 Truck 16 Unloading point 1 2400 Pile 4 Excavator 4 Truck 17 Truck 18 Truck 19 Truck 20 Unloading point 2 2600 Pile 5 Excavator 5 Truck 31 Truck 32 Truck 33 Unloading point 3 2700 Pile 6 Excavator 6 Truck 34 Truck 35 Truck 36 Unloading point 3 2300 Pile 7 Excavator 7 Truck 21 Truck 22 Truck 23 Truck 24 Truck 25 Unloading point 3

[0135] Table 4 shows the results of the first truck allocation. Table 8 shows the results of the first truck allocation. For the fourth group with insufficient trucks, the total shift production capacity of the allocated trucks is calculated:

[0136]

[0137] Where:

[0138] P′ i is the shift production capacity of the assigned trucks in group i, in tons (t);

[0139] t′ i M allocated to group i i Number of truck models;

[0140] P″ i This is the total shift production capacity of other types of trucks previously assigned to this group, in tons (t).

[0141] The calculation result is: P′4=1833.33t.

[0142] Step A5 is executed again to select the existing Model A truck for allocation to Group 4.

[0143] 9. Calculate the preferred truck model: Among the truck resources available for allocation to Engineering Team A, there are only 5 Model A trucks remaining, so Model A truck is the preferred truck model M4 for Group 4.

[0144] 10. Calculate the required number of trucks: Calculate the required number of trucks for the preferred truck model M4 in Group 4 using the following formula, dividing the required number into integer and decimal numbers:

[0145]

[0146] The calculation results are: t4 = 1.36, t 4整 =1,t 4小 =0.36;

[0147] 11. Determine that Team A's Model A trucks meet the above grouping requirements and assign Team A's Model A truck 6 to Group 4. The grouping results are shown in Table 5:

[0148] Output / t stockpile Excavator truck Unloading point 2500 Pile 1 Excavator 1 Truck 1 Truck 2 Truck 3 Truck 4 Truck 5 Unloading point 1 2800 Pile 2 Excavator 2 Truck 11 Truck 12 Truck 13 Unloading point 2 2200 Pile 3 Excavator 3 Truck 14 Truck 15 Truck 16 Unloading point 1 2400 Pile 4 Excavator 4 Truck 17 Truck 18 Truck 19 Truck 20 Truck 6 Unloading point 2 2600 Pile 5 Excavator 5 Truck 31 Truck 32 Truck 33 Unloading point 3 2700 Pile 6 Excavator 6 Truck 34 Truck 35 Truck 36 Unloading point 3 2300 Pile 7 Excavator 7 Truck 21 Truck 22 Truck 23 Truck 24 Truck 25 Unloading point 3

[0149] Table 5 is a table showing the results of truck reallocation

[0150] 12. Calculate the additional production capacity requirements for each group: Calculate the additional production capacity requirements P required for each "stockpile-excavator-truck-unloading point" group in addition to the trucks allocated according to the above method. i额 :

[0151] P i额 =t i小 L i

[0152] Where:

[0153] t i小 is the last calculated M of group i i "Decimal number of trucks required" for each model

[0154] L i M is the last selected M for group i i The fully loaded weight of the model truck, in tons (t).

[0155] The calculation results are:

[0156] P 1额 =33t,P 2额 =61.6t, P 3额 =89.1t, P 4额 =36t,P 5额 =44t,P 6额 =101.2t, P 7额 =21t.

[0157] 13. Set up the mobile truck group:

[0158] In addition to the seven "stockpile-excavator-truck-unloading point" groups mentioned above, two mobile truck groups were established. To prevent the mixed dispatch of truck equipment from the two engineering teams, mobile group 1 was bound to groups 1, 2, 3, and 4 corresponding to engineering team A, and mobile group 2 was bound to groups 5, 6, and 7 corresponding to engineering team B. The results of the mobile group settings are shown in Table 6:

[0159]

[0160] Table 6 is a schematic table for the setting of the mobile group

[0161] 14. Calculate the preferred truck model for the group:

[0162] In the four "stock pile-excavator-truck-unloading point" groups bound to mobile group 1:

[0163] P 3额 >P 2额 >P 4额 >P 1额

[0164] Because P 3额 The maximum value is obtained, so the third "stock pile-excavator-truck-unloading point" group is recorded as the max group, and the last assigned model B truck of engineering team A is selected as the preferred truck model of mobile group 1;

[0165] However, since the number of Model B trucks available for Team A is already 0, i额 The second largest "stock pile-excavator-truck-unloading point" group is recorded as the max group, and the model B truck of engineering team A, which was last assigned to it, is selected as the preferred truck model of mobile group 1;

[0166] However, since the number of Model B trucks available for Team A is already 0, the P i额 The next largest group, the fourth "stockpile-excavator-truck-unloading point" group, is designated the max group. The last assigned Model A truck from Engineering Team A is selected as the preferred truck model for Mobile Group 1. After inspection, the number of Model A trucks available for Engineering Team A is not zero, which means it can meet the demand.

[0167] In the three "Pile-Excavator-Truck-Unloading Point" groups bound to Mobile Group 2:

[0168] P 6额 >P 5额 >P 7额

[0169] Therefore, the sixth "pile-excavator-truck-unloading point" group is recorded as the max group, and the last assigned model B truck of engineering team B is the preferred truck model of mobile group 2.

[0170] 15. Calculate the number of trucks required for each mobile group: Calculate the number of trucks required for each mobile group (at this time, s = 0) using the following formula, and use the calculated result t j Round up to get the actual number of trucks required for the two mobile groups t′ j :

[0171]

[0172] Where:

[0173] t j For the jth mobile group, M max The required number of trucks of the model;

[0174] L j M max The fully loaded weight of the model truck, in tons (t);

[0175] L i is the M finally allocated to the i-th group among the k groups mentioned above i The fully loaded weight of the model truck, in tons (t);

[0176] t i小 For the i-th group among the above k groups, M i The decimal number of trucks required;

[0177] s is the number of truck types in the mobile group. When calculating for the first time, s = 0;

[0178] L x There is already M in the mobile group x The fully loaded weight of the model truck, in tons (t);

[0179] t x There is already M in the mobile group x The number of truck models.

[0180] The calculation results of the required number of trucks and the actual number of trucks required by the mobile group are:

[0181] t1=2.20,t′1=3;

[0182] t2=1.51, t′2=2;

[0183] 16. Determine whether the number of preferred truck models for the mobile team is sufficient:

[0184] After evaluation, the available number of trucks of various models is sufficient to meet the allocation needs of all mobile groups. Therefore, according to the above plan, Model A trucks 7, 8, and 9 of Engineering Team A are allocated to Mobile Group 1, and Model B trucks 37 and 38 of Engineering Team B are allocated to Mobile Group 2. The specific allocation results are shown in Table 7:

[0185]

[0186] Table 7 is a schematic diagram of the mobile group truck allocation

[0187] 17. Production Scheduling:

[0188] The scheduling algorithm dynamically evaluates the production progress of each "stockpile-excavator-truck-unloading point" group in real time. It ranks the first, second, third, and fourth "stockpile-excavator-truck-unloading point" groups bound to Mobile Group 1 from lowest to highest progress, and this ranking is updated in real time as production progresses. The production task of the group with the lowest progress is dynamically assigned to the trucks in Mobile Group 1.

[0189] The production tasks of the 5th, 6th, and 7th "Stockpile - Excavator - Truck - Unloading Point" groups bound to Mobile Group 2 are sorted from lowest to highest progress, and this ranking is updated in real time as production progresses. The production tasks of the group with the lowest production task progress are dynamically assigned to the trucks in Mobile Group 2 in real time.

[0190] For example, for Truck 7 in the first mobile group, before it performs its first production task or each time it completes a "loading-unloading" transport task, the scheduling algorithm automatically assigns the transport task of the group with the lowest production task progress among the current 1st, 2nd, 3rd, and 4th "piles-excavators-trucks-unloading point" groups to Truck 7. After receiving the production task, Truck 7 immediately goes to the excavator in that group to load, then goes to the unloading point in that group to unload. After unloading, it waits for the scheduling algorithm to assign a new production task. The same applies to Truck 8 and Truck 9. Trucks 37 and 38 in Mobile Group 2 similarly perform the production tasks of the 5th, 6th, and 7th "piles-excavators-trucks-unloading point" groups, and each task is dynamically adjusted in real time.

[0191] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system, characterized in that: include: Step A1: Develop annual, quarterly, and monthly production plans, and formulate ore allocation plans for each shift; Step A2: Create "Pile-Excavator-Truck-Unloading Point" groups and select one excavator from the available excavators for each "Pile-Excavator-Truck-Unloading Point" group. Step A3: Calculate the preferred truck model and select a truck from the truck resources to be allocated for the "Pile - Excavator - Truck - Unloading Point" group. Step A4: Determine the number of preferred truck models and grouping requirements; Step A5: Calculate the additional production capacity requirements for each group; Step A6: Set the motor truck group and calculate the preferred truck model of the motor truck group; Step A7: Calculate the number of trucks required for the group; Step A8: Determine the number of the preferred truck models of the mobile group and the allocation requirements of the mobile group; Step A9: After completing the grouping task, perform the shift production scheduling operation.

2. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A1, future ore demand is forecast based on market demand and contract requirements, the mine's recoverable reserves and grade are assessed, and annual, quarterly, and monthly production targets are set taking into account both economic benefits and production capacity. After setting annual, quarterly, and monthly production targets, select the n stockpiles planned for mining in the current shift and use the automatic ore allocation model to develop the production indicators and corresponding unloading points for each stockpile in the current shift.

3. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A2, n piles are divided into b groups of "pile-excavator-truck-unloading point", where n = b. The information of each group includes: pile, excavator, truck, unloading point and output. In each group, the number of piles, excavators and unloading points is 1, and the number of trucks is a. The numbers of the n piles and their corresponding unloading points in step A1 are filled into each group. The output index of each pile is the output of the corresponding group. The output of group i is expressed as P i , where i≤n, unit is tons; Assume that the shift production capacity of the i-th group of excavators is C i , in tons, and C i ≥P i , and C i With P i The specific method for calculating the difference is: D i =C i -P i , where D i Expressed as the difference between shift capacity and output, C i It is expressed as the shift production capacity of the i-th group of excavators, P i It is expressed as the output of group i.

4. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A3, the truck equipment includes the truck model and the number of trucks, wherein trucks of the same model are allocated to the same group; the truck model of each group is determined by the scoop ratio; if the scoop ratio calculated among the truck resources to be allocated is an integer, the allocation is performed directly; if the scoop ratio calculated among the truck resources to be allocated is not an integer, the truck model with the largest number among the truck resources to be allocated is preferentially allocated, and based on this principle, the preferred truck model M of each group is selected from the available truck resources to be allocated. i ; Preferred Truck Model M i The calculation method for the corresponding number of required vehicles is as follows: Among them, t i Represented as M in group i i The required number of trucks of the model, λ represents the congestion coefficient of the road between the material pile and the unloading point of the group, and λ≥1; S i It is expressed as the round trip mileage between the group stockpile and the unloading point, in kilometers; P' i It is expressed as the total production capacity of the assigned trucks of group i, in tons. When the number of trucks required for this group is calculated for the first time, P' i =0; G represents the production operation time of a shift, in hours; L i Indicated as M i The fully loaded weight of the model truck in tons, V i is the average transport speed of trucks in kilometers per hour.

5. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A4, if the number of available trucks of various models is sufficient to meet the allocation requirements of all groups, then the number of truck models M of each group is i and the number of trucks t i整 Assign trucks to each group and proceed to step A5. If some preferred truck models are insufficient and no other models are available, indicating that the existing truck resources cannot meet the task requirements, jump to step A1 and re-formulate the shift production plan. If some preferred truck models are insufficient and other models are available, allocate existing trucks to groups according to the current preferred model. For groups with duplicate preferred truck models, prioritize the group with the smaller truck requirement and proceed to the next step. If there are insufficient trucks, let P" i =P' i , calculate the total production capacity of the assigned trucks, the calculation method is as follows: Among them, P' i It is the shift production capacity of the assigned trucks of group i, in tons; t' i Represented as the M allocated to group i i Number of truck models; P" i It is expressed as the total shift production capacity of other types of trucks that have been previously assigned to this group, in tons.

6. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A5, the additional production capacity requirement P required for each "stockpile-excavator-truck-unloading point" group in addition to the trucks allocated according to the above method is calculated. i额 The specific calculation method is: P i额 =t i小 L i , where t i小 Represented as the last calculated M of group i i "Decimal number of trucks required" of the model; L i Represents M as the last selection of group i i The fully laden weight of the model truck in tons.

7. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A6, in addition to the b "stock pile-excavator-truck-unloading point" groups mentioned above, m mobile truck groups (m≤n) are established according to the site conditions. Each mobile group contains c truck equipment, and each mobile group is bound to more than one "stock pile-excavator-truck-unloading point" group. The "stock pile-excavator-truck-unloading point" groups bound to different mobile groups are unique. The additional production capacity requirements P of the k "stock pile-excavator-truck-unloading point" groups bound to the jth (j≤m) mobile group i额 Sort by large to small, where P i额 The largest group is recorded as the max group; determine the last allocated M in the max group max Is the number of trucks to be allocated zero? max If the number of available truck models is not zero, then the truck model is selected as the preferred truck model for the jth mobile group; if M max If the number of available truck models is 0, then group the k “piles-excavators-trucks-unloading points” into P i额 The next largest group is recorded as the max group, and the above judgment operation is repeated; if the last assigned truck model of all k "stock pile-excavator-truck-unloading point" groups has no optional resources to be allocated, then the model with the largest number of available available truck resources is selected and made the preferred truck model of the jth mobile group, which is recorded as M max .

8. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A7, the decimal number of vehicles required for the k "stock pile-excavator-truck-unloading point" groups bound to the j-th mobile group is converted into the number of vehicles required for M max The required number of trucks of each model is summed up to get the required number of trucks for the j-th mobile group: Among them, t j Expressed as the jth maneuver group for M max The required number of trucks of the model; L j Indicated as M max The fully loaded weight of the model truck, in tons; L i It represents the M finally allocated to the i-th group among the k groups mentioned above. i The fully loaded weight of the model truck, in tons; t i小 It is expressed as the i-th group among the above k groups for M i The decimal number of trucks required; s represents the number of truck types in the mobile group. When calculating for the first time, s = 0; L x Indicates that there is M in the mobile group x The fully loaded weight of the model truck, in tons; t x Indicates that there is M in the mobile group x The number of truck models.

9. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In the step A8, if the number of available trucks of various models is sufficient to meet the allocation requirements of all mobile groups, then the number of truck models M in each group is max and the actual number of trucks required t' j Assign trucks to each group and then proceed to the next step; if some mobile groups do not have enough preferred truck models and no other models of truck equipment are available, it means that the existing truck resource transportation capacity cannot meet the task requirements, then jump to step A1 and re-formulate the class production plan; if some mobile groups do not have enough preferred truck models and other models of truck equipment are available, then allocate existing trucks to the group according to the preferred truck models at this time. For mobile groups with repeated preferred truck models, give priority to the mobile group with a smaller number of truck requirements, then jump to step A6 and continue to select other models of trucks.

10. The method for calculating and grouping vehicle-to-shovel ratio in an open-pit mine scheduling system according to claim 1, characterized in that: In step A9, after completing the "stock pile - excavator - truck - unloading point" grouping and the mobile grouping, shift production scheduling is performed. Trucks in the "stock pile - excavator - truck - unloading point" grouping will perform transportation tasks by regularly traveling back and forth between the excavators in the group and the unloading point in the group according to the fixed-shovel dispatching operation mode. The truck equipment in the mobile group performs the truck transportation tasks of any "stock pile-excavator-truck-unloading point" group bound to the mobile group on a trip basis. The production scheduling algorithm determines which group's transportation tasks the trucks in the mobile group will perform.

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