Abstract:Одной из основных проблем экскаваторно-автомобильных комплексов (ЭАК) разрезов является достаточно низкий уровень качества их работы. Мощным средством повышения качества функционирования ЭАК является его оптимизация, осуществляемая по логико-математической модели, включающей целевую функцию и ограничения, накладываемые спецификой работы ЭАК и внешней горной средой. В качестве целевого критерия выбран обобщенный показатель качества функционирования ЭАК; в качестве оптимизируемых параметров-основные показатели к… Show more
“…But the value of 𝑘 𝑁 * for the summer period (6,653) can be reduced. A decrease in the value of 𝑘 𝑁 * from 6,653 to 6,60 means that, in accordance with the margin for the limitation of the STS efficiency [11], its decrease will not be 1,529 (maximum), but 1,474. In proportion to this coefficient, the values of 𝑡 𝑙 𝑠 and 𝑡 ℎ will also change.…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 96%
“…coal mines in Kuzbass in the summer period has the following form [11]: 𝑘 = −0,268 + 0,209𝑘 𝑁 + 0,397𝑡 𝑙 𝑠 − 0,0415𝑡 ℎ → 𝑚𝑎𝑥; 0,130𝑘 𝑁 + 0,230𝑡 𝑙 𝑠 − 0,0250𝑡 ℎ ≥ 0,917; 0,130𝑘 𝑁 + 0,230𝑡 𝑙 𝑠 − 0,0250𝑡 ℎ ≤ 1,083; 𝑡 𝑙 𝑠 + 0,0619𝑡 ℎ ≥ 4,822;…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 99%
“…The optimal solution, therefore, is as follows: If, by analogy with the summer period [11], we consider not the minimum but the maximum value 𝑘 𝑁 = 6,600 to be optimal, then the optimal solution is the following one:…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 99%
“…However, there are not enough methodological and normative materials regulating such an important direction of improving the quality of objects as their optimization. To date, several works have been devoted to the optimization of the rotary drilling rigs, single-bucket hydraulic excavators, motor transport equipment for open-pit coal mines, and also STS operation in the summer period [6][7][8][9][10][11][16][17][18][19][20].…”
The operation quality of shovel-truck systems (STSs) at open-pit coal mines in the summer and transitional autumn-spring periods differs markedly. This is due to a decrease in the speed of haul trucks during the transitional season compared to the summer season. This leads to an increase in the travel time of trucks. Shovels and trucks must work longer to ensure the planned volumes of loading and transportation and the required number of hauls. Consequently, the duration of the working shift (or day) increases. This leads to deterioration in the STS performance in the autumn-spring period. A quantitative assessment of changes in the STS operation quality will reveal the directions of its improvement.
“…But the value of 𝑘 𝑁 * for the summer period (6,653) can be reduced. A decrease in the value of 𝑘 𝑁 * from 6,653 to 6,60 means that, in accordance with the margin for the limitation of the STS efficiency [11], its decrease will not be 1,529 (maximum), but 1,474. In proportion to this coefficient, the values of 𝑡 𝑙 𝑠 and 𝑡 ℎ will also change.…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 96%
“…coal mines in Kuzbass in the summer period has the following form [11]: 𝑘 = −0,268 + 0,209𝑘 𝑁 + 0,397𝑡 𝑙 𝑠 − 0,0415𝑡 ℎ → 𝑚𝑎𝑥; 0,130𝑘 𝑁 + 0,230𝑡 𝑙 𝑠 − 0,0250𝑡 ℎ ≥ 0,917; 0,130𝑘 𝑁 + 0,230𝑡 𝑙 𝑠 − 0,0250𝑡 ℎ ≤ 1,083; 𝑡 𝑙 𝑠 + 0,0619𝑡 ℎ ≥ 4,822;…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 99%
“…The optimal solution, therefore, is as follows: If, by analogy with the summer period [11], we consider not the minimum but the maximum value 𝑘 𝑁 = 6,600 to be optimal, then the optimal solution is the following one:…”
Section: Mathematical Model Of Optimization (Mmo) Of the Sts Operation Indicators At Open-pitmentioning
confidence: 99%
“…However, there are not enough methodological and normative materials regulating such an important direction of improving the quality of objects as their optimization. To date, several works have been devoted to the optimization of the rotary drilling rigs, single-bucket hydraulic excavators, motor transport equipment for open-pit coal mines, and also STS operation in the summer period [6][7][8][9][10][11][16][17][18][19][20].…”
The operation quality of shovel-truck systems (STSs) at open-pit coal mines in the summer and transitional autumn-spring periods differs markedly. This is due to a decrease in the speed of haul trucks during the transitional season compared to the summer season. This leads to an increase in the travel time of trucks. Shovels and trucks must work longer to ensure the planned volumes of loading and transportation and the required number of hauls. Consequently, the duration of the working shift (or day) increases. This leads to deterioration in the STS performance in the autumn-spring period. A quantitative assessment of changes in the STS operation quality will reveal the directions of its improvement.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.