Coal mines are a vital component of my country’s energy system, providing essential energy for numerous industries, including power, metallurgy, and chemicals. However, the coal mining process is energy-intensive and complex, involving multiple systems such as ventilation, drainage, transportation, mining, lighting, compressed air, and coal preparation. Statistics show that energy costs for coal mining companies typically account for over 30% of total production costs, and problems such as extensive management, inefficient equipment, and significant waste are common.
Under the “Dual Carbon” strategy (carbon peak and carbon neutrality), coal mining companies must not only ensure safety and production but also improve energy efficiency and achieve a green, low-carbon transition. Energy management, therefore, has become a key component of intelligent coal mining and its sustainable development.

Main Characteristics of Coal Mining Energy Consumption

1. Electricity-Based Energy Structure
   In coal mining operations, electricity accounts for approximately 70% to 85% of total energy consumption. Key electrical equipment includes large electric devices such as ventilators, hoists, compressors, pumps, and conveyors.
2. Multiple energy-consuming links and large load fluctuations
   Energy consumption in each production link varies significantly with mining progress, production shifts, seasonal climate, and other factors, leading to complex power supply and management.
3. Widespread energy waste
   Many coal mines suffer from problems such as chronically inefficient equipment operation, no-load energy consumption, and severe air and water leakage. Manual management methods are outdated, and there is a lack of a unified monitoring and dispatching system.
4. Environmental pressures and safety risks coexist
   High energy consumption is often accompanied by high emissions and high risks. Inadequate ventilation, untimely drainage, or equipment failures can all pose safety hazards.

Main Aspects Of Coal Mining Energy Management

A coal mining energy management system typically includes five major components: energy metering, monitoring, analysis, optimization, and control.

1. Energy metering management
   Establish a comprehensive energy metering system, implementing tiered metering and zoned monitoring for electricity, water, gas, oil, and coal.
   Use online metering equipment such as smart meters, flow meters, and pressure sensors to ensure accurate and real-time data. Independent metering points are set up for major energy-consuming equipment (such as ventilators, compressors, pumps, and main conveyors) to achieve energy consumption sharing.
2. Energy Monitoring System
   Establish an energy monitoring center to monitor mine-wide energy consumption in real time through a SCADA system, energy consumption collection terminals, and a communication network.
   Achieve “visualized” energy management: including power load curves, equipment energy efficiency, and energy consumption trend analysis.
   Threshold alarms and automatic control functions promptly detect abnormal energy consumption or equipment failures.
3. Energy Consumption Analysis and Statistics
   Analyze energy consumption by shift, system, area, and equipment, and generate energy consumption reports.
   Utilize big data and AI algorithms to identify high-energy-consuming equipment and waste sources, and formulate energy-saving measures.
   Compare historical data with production indicators to calculate key performance indicators (KPIs) such as energy consumption per unit of coal produced and electricity consumption per ton of coal.
4. Optimization and Energy-Saving Control
   Utilize variable frequency drive (VFD) technology to adjust the load of ventilators, compressors, and pumps, reducing no-load energy consumption. Implement time-of-use electricity and peak/off-peak electricity pricing strategies to rationally schedule the operation of high-energy-consuming equipment.
   Utilize automated control systems to achieve on-demand ventilation, intelligent drainage, and load balancing.
   Perform energy-saving retrofits on older equipment, such as replacing high-efficiency motors, energy-saving lighting, and optimizing conveyor systems.

Energy management in the coal mining industry is not only a means of reducing production costs but also a core component in promoting safe production, green transformation, and intelligent development. By establishing a scientific energy measurement system, introducing an energy management system, and implementing energy-saving technology upgrades, coal mining enterprises can achieve the goals of “safe, efficient, low-carbon, and intelligent” energy utilization.