Coal mining - Wikipedia

    When coal seams are near the surface, it may be economical to extract the coal using open cut (also referred to as open cast, open pit, mountaintop removal or strip) mining methods. Opencast coal mining recovers a greater proportion of the coal deposit than underground methods, as more of the coal seams in the strata may be exploited. This equipment can include the following: Draglines which ...

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    Coal – NLT Digital

    The NetPort IS is the primary device that delivers an intrinsically safe, highly reliable Wi-Fi network to underground coal. The all-in-one solution includes a built in access point, UPS and two (2) Single Mode Fiber Ports to enable a range of network topologies. The NetPort IS can achieve strong and reliable WiFi coverage in underground coal mines and supports many advanced network standards ...

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    Coal mining - Underground mining | Britannica

    A longwall miner shearing coal at the face of a coal seam; from an underground mine in southern Ohio, U.S. Joy Technologies Inc. In modern mechanized longwall operations, the coal is cut and loaded onto a face conveyor by continuous longwall miners called shearers or plows (see photograph).

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    Burning for Over 100 Years, Jharkhand's .

    16.07.2019 · New Delhi: As thousands sit on top of an active volcano, an underground coal fire burning for more than 100 years in Jharia in Jharkhand's Dhanbad district has finally drawn the attention of the Supreme Court. Prioritising the case pending before it since 1997, the apex court has taken it upon itself to monitor rescue and rehabilitation of the residents affected by the fatal blaze burning ...

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    Underground coal gasification technology, .

    Underground coal gasification is a so-called "unconventional" means of extracting gas from coal seams that are too deep to mine. Coal is burned in situ underground and the gas produced is siphoned ...

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    Extend your underground coal mine network to the face

    Extend your underground coal mine network to the face Unit 3, 9 Packard Ave Castle Hill, NSW AUSTRALIA 2154 T +61 2 9899 6857 F +61 2 8456 6004 Broadband power-line modems "The Nautitech Spitfire power-line modem has proven itself to be ruggedized and reliable for our Australian applications together with the necessary level of technical support" - John, MD . Wireless ...

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