Multi-Objective Optimization of a Mine Water Reuse System Based on Improved Particle Swarm Optimization.

Yang Liu,Dongxu Zhu,Zihang Zhang,Lei Bo

doi:10.3390/s21124114

Yang Liu, Dongxu Zhu + Show 2 more

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https://doi.org/10.3390/s21124114

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Abstract

This paper proposes a general hierarchical dispatching strategy of mine water, with the aim of addressing the problems of low reuse rate of coal mine water, and insufficient data analysis. First of all, water quality and quantity data of the Narim River No. 2 mine were used as the research object; the maximum reuse rate of mine water and the system operation rate comprised the objective function; and mine water quality information, mine water standard, and mine water treatment speed were the constraints. A multi-objective optimization scheduling mathematical model of water supply system was established. Then, to address the problems of premature convergence and ease of falling into a local optimum in the iterative process of particle swarm optimization, the basic particle swarm optimization was improved. Using detailed simulation research, the superiority of the improved algorithm was verified. Eventually, the mine water grading dispatching strategy proposed in this paper is compared with the traditional dispatching method. The results show that the hierarchical dispatching system can significantly improve the mine water reuse rate and system operating efficiency.

Highlights

Mine water undergoes a series of physical, chemical, and biochemical reactions during coal mining while in contact with coal strata, and it is influenced by human activities
The mining area is located in Ordos, Inner Mongolia, which is characterized by special geological conditions
Combined with the above-mentioned particle swarm algorithm, the optimized scheduling model mentioned in this article can be integrated into the control system to make predictions regarding the quantity and quality of water resources in the mining area

Summary

Introduction

Mine water undergoes a series of physical, chemical, and biochemical reactions during coal mining while in contact with coal strata, and it is influenced by human activities. The mine water treatment tank is shown in the Figure 1. The mining area is located in Ordos, Inner Mongolia, which is characterized by special geological conditions. The mine is situated in the basin of the Wuding River, which is the first tributary of the Yellow River, and has abundant water inflow. A previous investigation found that a large portion of the mine water is treated and reused within the area of the mine [1,2]. The treatment process is fixed and corresponding adjustments cannot be made according to changes in time or space

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