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In 2006, three major underground coal mine accidents in the United States claimed the lives of 19 miners and prompted lawmakers to pass the Mine Improvement and New Emergency Response Act (MINER Act) of 2006. One of the requirements of the MINER Act is to provide wireless two-way communications and location information between underground workers and surface personnel following an underground accident. At the time of the accidents in 2006, most coal mine communications systems consisted of either leaky feeder systems or pager phones. A few mines had electronic brass-in/brass-out systems or zone-based tracking, but location tracking throughout the entire mine was not a common practice. Since then, efforts to develop new radio communications and personnel tracking technology have resulted in many new systems on the market for underground mine applications, and new systems continue to be introduced. New communications technologies include radio node network systems, such as mesh and Wi-Fi; improved leaky feeder systems; low-frequency, through-the-earth systems ; medium frequency radios; and combinations of these technologies. New personnel electronic tracking technologies include radio frequency identification (RFID) and radio ranging techniques. Due to the increasing availability of new systems, the Mine Safety and Health Administration (MSHA) requires underground coal mines to have compliant communications and electronic tracking (CT) systems installed by June 15, 2011

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The new CT technology that is available may be unfamiliar to mining professionals who need to purchase, install, and use this technology. To provide a better understanding of CT technology, a two-part tutorial has been developed by the Office of Mine Safety and Health Research (OMSHR), a division of the National Institute for Occupational Safety and Health (NIOSH), which consists of an overview of the available technologies (Part 1) and advanced details on how available systems operate (Part 2). The reader should review the Tutorial on Wireless Communication and Electronic Tracking - Part 1: Technology Overview online before studying this document - Part 2: Advanced

Readers of this tutorial are assumed to be associated with coal mining, and therefore familiar with coal mining operations and terminology, and to have a technical background in electronics and/or communications systems. This tutorial is meant for those who need detailed information to compare systems and whose job responsibilities require advanced knowledge. For example, the mine’s communications expert will need to understand how the underground environment influences the performance of CT systems, how different CT systems work, and their advantages and disadvantages

This tutorial provides an advanced discussion of the available CT technologies and operating characteristics starting with general communications system performance considerations in Section 2.1. This is followed by descriptions of specific technologies used for both primary communications (daily use, high bandwidth) and secondary communications (emergency use, low bandwidth). A comparison of the available technologies is presented in Section 2.6. Chapter 3 provides details on the operation and performance of the available miner tracking systems

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A critical question related to CT technology is, "What happens after a major accident?" Chapter 4 discusses issues related to survivability and reliability. Chapter 5 discusses safety issues such as MSHA certification of electronics used in explosive atmospheres, safe battery designs, and concerns related to electromagnetic fields. Chapter 6 discusses considerations related to the mine operations center (MOC) on the surface. There are also two appendices; Appendix A provides CT systems engineering specifications, and Appendix B gives basic wireless CT theory including link budget analysis and electromagnetic interference (EMI). A list of technical references and standards are also included at the end of this tutorial for further information. The italicized words in the text of this document are hyperlinked directly to the Mine Communications and Tracking Glossary

coal ratio - an overview | sciencedirect topics

Worker Safety is a top priority for mining, oil and gas operations around the world. Keeping them connected and informed is key to a safe and efficient workplace. Learn how applications and features like Man Down and Intrinsically Safe can help your organization

Migrating to digital carries many benefits for Mining, Oil and Gas, but radio system owners need confidence that system upgrades will be completed smoothly, on time, on budget and without disruption to system availability. Tait expertise, knowledge, and products can help ensure you experience an easy migration

coal ratio - an overview | sciencedirect topics

The Tait DMR Tier 3 network at Newmont Goldcorp Boddington transmits around 15,000 calls on each of the sites per day. Call volume in a busy hour can be between 1,000 and 1,200 calls. Tait Managed Services provide 24/7 system monitoring, support, and proactive response to minimize any interruptions of mining operations.

Tait Digital Mobile Radio (DMR) Tier 3 is a digital communications platform that delivers workforce efficiencies and operational benefits for Mining, Oil and Gas agencies. With Intrinsically Safe portables available, this narrowband technology can carry both voice and data, so you can achieve more with your radio network than ever before

Tait Unified Vehicle supercharges the performance of a new or existing Tait mobile radio by loading it with more connectivity, computing power, and applications. By creating a network of networks, Tait Unified Vehicle ensures users are connected anytime, anywhere. The customizable platform enables you to load it with applications specific to the needs of your organization, offering increased safety, efficiency, and more

coal ratio - an overview | sciencedirect topics

Tait Private LTE offers organizations full control of data traffic and applications. Unlike Commercial LTE – which is designed for mass use – Tait Private LTE is an independent cellular network purpose-built for your organization’s specific communications and coverage requirements. Tait Private LTE solutions can be deployed anywhere, including areas beyond the reach of public networks

Our Tait Tough portables have been engineered to survive the extreme heat and demanding environments you use them in. Our Intrinsically Safe portables are engineered to operate safely in hazardous environments, keeping your people safe while they get the job done

EP Petroecuador chose a Tait solution because of the quality and support that Tait are known for, as well as the value for money the solution provided. Tait designed and deployed a phased migration from the existing analog network to Tait DMR Tier 2. The carefully designed and deployed migration was seamless, allowing EP Petroecuador to continue operating during the process

coal ratio - an overview | sciencedirect topics

Mining is fast embracing automation and digital technologies across operations. These transformative applications all require business-critical network connectivity, and given the nature of mining operations, wireless mobile communications are ideal. Learn how wireless broadband networks can solve today's problems

Late last year, we released the new TP9500 and TP9600 radios to expand and improve our Tait Tough range. Alongside exceptional audio quality, enhanced worker safety tools and improved user experience, one of the standout features of these radios is Active Noise Cancellation (ANC). In this video, we see that in a real scenario

Much like the strata of rock visible in a mine, modern mining communications rest on layers of communications technologies, introduced over time to improve the safety, efficiency, and productivity of mining operations

coal ratio - an overview | sciencedirect topics

Worker safety is critical to the successful operation of mining organizations. This infographic takes a comparative look and explores how Tait DMR Tier 3 can make a significant difference in emergency situations

Our Tait Tough portables have been engineered to survive the extreme heat and demanding environments you use them in. Our Intrinsically Safe portables are engineered to operate safely in hazardous environments, keeping your people safe while they get the job done

EP Petroecuador chose a Tait solution because of the quality and support that Tait are known for, as well as the value for money the solution provided. Tait designed and deployed a phased migration from the existing analog network to Tait DMR Tier 2. The carefully designed and deployed migration was seamless, allowing EP Petroecuador to continue operating during the process

coal ratio - an overview | sciencedirect topics

Mining is fast embracing automation and digital technologies across operations. These transformative applications all require business-critical network connectivity, and given the nature of mining operations, wireless mobile communications are ideal. Learn how wireless broadband networks can solve today's problems

Late last year, we released the new TP9500 and TP9600 radios to expand and improve our Tait Tough range. Alongside exceptional audio quality, enhanced worker safety tools and improved user experience, one of the standout features of these radios is Active Noise Cancellation (ANC). In this video, we see that in a real scenario

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