Comment
Author: Admin | 2025-04-27
2 , 3 , … (11) x r j i ∈ 1 , 2 , 3 , … (12) 2.1.4. Collaborative Production Planning StrategyThe multi-machine collaborative production planning scheme for open-pit mines is a method that involves optimizing the initial production plan under the given constraints and assumptions through the use of optimization algorithms. Thereafter, an improved production plan is obtained, aiming to achieve better objectives. The initial production planning scheme can be obtained by randomly generating the loading and unloading sequence of each unmanned mining truck. The loading points are represented by {A, B, C, …} and the unloading points by {a, b, c, …}. An example of the loading and unloading sequence is S c r = A a B b C c D a E b F c … … , r = 1 , 2 , 3 , … , R (13) which means that the unmanned mining truck drives from loading point A to unloading point a and then to loading point B, unloading point b, loading point C, unloading point c, loading point D, unloading point a, loading point E, unloading point b, loading point F, unloading point c, etc.A construction sequence for an unmanned excavator is S e i = A 2 A 3 A 1 … , i = 1 , 2 , 3 , … , I (14) which means that at loading point A, construction work starts in subarea A 2 , followed by subareas A 3 and A 1 , etc. When the loading point has n subareas, according to the mathematical formula of permutation and combination, there are n! kinds of construction sequences.The loading and unloading sequence of all unmanned mining trucks and the subarea construction sequence of the unmanned excavators constitutes a multi-machine collaborative production planning scheme. S = S c 1 , S c 2 … , S e 1 , S e 2 … (15) To transform the production planning model into an optimization problem format, production planning scheme S is mapped into an integer vector: x = [ x 1 , x 2 , x 3 ] (16) where x1 represents the vector composed of the loading point in the loading sequence of an unmanned mining truck, and the integer {1, 2, 3 …} refers to the loading point {A, B, C, …}; x2 represents the vector composed of unloading points in the unmanned
Add Comment