Driven by escalating challenges such as volatile commodity markets, declining ore grades, rising energy costs, and extreme operating conditions, the ability to leverage reliable and flexible communication systems is becoming increasingly important. Leading mining operators have begun their digital transformation as they aim to create “connected mines.” Based on the essential communications required for daily mining operations, and through application and system layers utilizing massive IoT sensor networks, the future of the mining industry is sure to be safer, smarter, and more efficient. In fact, the World Economic Forum predicts that digitalization will add $425 billion in value to the industry over the next five years.
Here are five ways that IoT in the mining industry can improve security, ensure payload, reduce operational delays, and provide real-time data for intelligent decision-making.
1. Asset tracking, remote diagnostics, and predictive maintenance
As a capital-intensive industry, mining requires a wide variety of equipment, from drilling rigs, excavators, and conveyors to pumps, motors, and fans, which are widely distributed both above and below ground. Wireless IoT sensors that monitor and track key asset parameters such as pressure, vibration, flow, and temperature, as well as engine performance, enable real-time remote diagnostics, troubleshooting, and asset tracking throughout the mining area. Combined with analytical models, corrective maintenance and spare parts procurement can be effectively planned to prevent equipment downtime and help companies avoid costly production losses.
2. Discharge and groundwater level monitoring
Diesel exhaust from underground excavation equipment and drilling rigs contains toxic gases and particulate matter, posing a serious health threat. By employing fixed and mobile gas detectors and particle sensors, emission levels and threshold limits can be effectively controlled to maintain a safe working environment that meets safety standards. Chemical residues from mining operations can contaminate groundwater and cause serious environmental problems. Using data from level sensors, mining operators can track real-time changes in mine groundwater levels, especially during rainfall. Timely and effective pumping can prevent excessive inflow, thus avoiding pollution and groundwater flooding.
3. Post-blast monitoring
After blasting in a mine, the area is often filled with toxic fumes and debris. Waiting hours for the fumes to dissipate completely can result in costly downtime. With a wireless environmental monitoring system, operators and miners can know at any time whether an area is safe enough to resume work. This reduces unnecessary waiting time, allowing for faster resumption of work after blasting and increased productivity.
4. Wearable device-based event reporting and rock bolt monitoring
As is well known, mines are among the most dangerous working environments, with high risks of explosions, equipment accidents, and exposure to toxic substances. Ensuring the health and safety of miners has always been a significant challenge. With the help of IoT wearable devices, it is now possible to track miners' health and working environment (i.e., temperature, humidity, radiation, noise, and gas levels) in real time. Managers will be immediately notified of events such as fatigue, exhaustion, and "overload" among their workers, while miners will receive timely warnings in the event of potential hazards. Similarly, sensors monitoring seismic activity in underground mines can be mounted on rock anchors to effectively assess their integrity and reduce the fatal risk of collapse.
5. Ventilate as needed
Ventilation can account for 30-40% of energy consumption in underground mines. By supporting on-demand ventilation systems, IoT sensors can be used to continuously monitor air quality and airflow in different areas of the mine to remotely adjust fan speeds. Transmitting data from occupancy sensors or miner registration data from NFC tags can also ensure that ventilation is activated in the miner's work area. This will significantly save energy, thereby significantly reducing operating costs and environmental footprint.
Wireless connectivity for interconnected mines
While connectivity is crucial for data collection in interconnected mines, remote locations, extreme depth, confined spaces, and asymmetric mine topologies present the most challenging conditions for data communication. Wired networks offer limited coverage, are expensive, and are highly susceptible to physical disruptions caused by mining equipment operating underground. Furthermore, cellular and short-range solutions like Wi-Fi fail to provide sufficient coverage and reliable signals in underground and inaccessible large mines.
Third-generation Low-Power Wide-Area Networks (LPWANs) are designed for low-bandwidth, low-computation end nodes, providing energy-efficient and cost-effective IoT connectivity in complex, remote industrial environments. Currently, no other wireless category can surpass LPWAN in terms of battery life, device and connectivity costs, and ease of implementation. As the name suggests, LPWAN nodes are designed to operate for years on a single battery, rather than just a few days like other wireless solutions. They can also transmit for kilometers while providing deep penetration capabilities to connect devices in hard-to-reach indoor and underground locations, making them an ideal technology for supporting IoT in the mining industry.
