VDMA

INDA 2017

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 20 VDMA MINING SUPPLEMENT • 2017 The new Mine Refuge Chamber (MRC) 5000 attracted a lot of atten- tion at MINExpo last year. A total life support system, this cost-ef- fective chamber was completely designed by Dräger — from the seal-welded steel structure and redundant air supply system, to the soda lime cartridges and gas detection devices. "Because we design and build most of the individual compo- nents, we created a well-integrated, technically advanced life sup- port system," said Brad Rekuc, sales manager, mining, for Dräger. "The MRC can be leased or purchased, and is totally supported by Dräger Service with local maintenance and repair to ensure that the chamber is always operational." Because every mine is different, Dräger also offers engineered chambers that are designed and built to customer-specific requirements. Several systems work together in the chamber to provide a safe breathing environment. The chamber can be connected to an exter- nal air supply. Oils, water and small particles are filtered from the air. A constant positive pressure of between 150 and 200 Pa in the chamber prevents contaminated air from entering the main room. This safety feature is automatically sustained and controlled by the Dräger Breathing Protection Unit (BPU). Armed with positive pressure and a reliable air supply system, a gas-tight door prevents contaminated air from entering the cham- ber. The Dräger Airlock has an air purging system that dilutes any contaminated air that enters. This allows miners to enter and exit the chamber multiple times, while minimizing the risk of noxious gas and smoke entering the chamber. Dräger gas detection systems continually monitor the air inside the chamber, which allows miners to adjust the system depending on the values for carbon dioxide (CO 2 ) and oxygen (O 2 ). The chamber is a self-sufficient underground emergency chamber, meaning that it does not depend on external air or power supplies to keep miners safe. The air inside the chamber is regenerated by the CO 2 scrub- bing process in the breathing air regeneration system. CO 2 is removed (scrubbed) from the interior air by easy-to-use Drägersorb soda lime cartridges, which eliminate direct contact with soda lime dust. Miners simply remove the caps, break the foil seals and insert the cartridges into the top of the BPU. This pour- free scenario eliminates the possibility of soda lime dust exposure in a small space. The BPU has a dedicated battery backup system, and each fan works independently and can be adjusted for the num- ber of occupants. In self-sufficient operations, high-pressure cylinders replenish O 2 levels. Dräger's proprietary gas detection equipment continuously monitors the internal atmosphere for the presence of CO 2 and CO, as well as O 2 levels. If gas concentrations fall outside preset limits, audible and visual alarms warn the miners so they can adjust sys- tems and maintain a safe atmosphere. An air conditioning system keeps the chamber's interior temperature and humidity at comfort- able levels. In addition, a fixed external gas monitoring system that measures the CO and O 2 concentrations outside of the chamber and displays results inside the chamber can be installed as an option. The electrical system for the MRC 5000 includes batteries for all electrical functions, the air conditioning system, and green and red external status lights. Together with the inverter/charger system, battery backup ensures continuous power for up to a minimum of 24 hours (extended times are optional). With a history that dates back to 1889, Dräger is an internation- al leader in the fields of medical and safety technology. The com- pany's portfolio of mine safety products including gas detection solutions, personal protective gear, innovative firefighting equip- ment, and thermal imaging cameras. Flameproof Technology Improves Safety and Profitability Safety and cost effectiveness are always a challenge with regard to underground mining and tunneling. For almost 50 years, the Hermann Paus Maschinenfabrik GmbH has been focused on these issues and optimizes almost standard vehicles as well as customer requests for the best solutions. This year, the Paus LHD (PFL 30S) got a new face lift and is flameproof designed for more safety and mobility. Paus excels in lift technology, construction machines, industrial vehicles and, of course, underground mining and tunneling support worldwide. The company offers an all-in-one production with an increased aware- ness of safety and support. "The people who care," is the Paus philosophy. To care for cus- tomers' needs was the main issue when Hermann Paus founded his manufacturing company in 1968. He realized the special needs of this diversified mining industry and that was the first step in today's main business. Over the years, the Paus family has developed an impressive range of mining vehicles, trucks, loaders, scalers, grad- ers and customized solutions — always with a focus on safety first. Regarding safety and innovation, all the company's manufacturing is centrally located, guaranteeing optimum one-source craftsman- ship. The same applies for the new flameproof technology, which was developed at the Paus facilities in Emsbüren. The LHD (PFL 30S) has had several safety and ergonomic improvements. The drivers have more stability and comfort with more space. To enter, the miners use a direct side entrance in- stead of having the confrontation with the articulated joint behind the kinematic. Health and Safety: A Safe Haven Underground The MRC 5000 is a self-sufficient underground emergency chamber.

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