Emergency Refuge Coal Mine

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    chapter 1513: coal surface mining. 1513.01 coal surface mining definitions. as used in this chapter: "approximate original contour" means that surface configuration achieved by backfilling and grading of a mined area so that the reclaimed area, including any terracing or access roads, closely resembles the general surface configuration of the

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    the 2010 copiapó mining accident, also known then as the "chilean mining accident", began on thursday, 5 august 2010 with a cave in at the san josé copper–gold mine, located in the atacama desert 45 kilometers (28 mi) north of the regional capital of copiapó, in northern chile.

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  • 2010 copiapó mining accident

    the 2010 copiapó mining accident, also known then as the "chilean mining accident", began on thursday, 5 august 2010 with a cave in at the san josé copper–gold mine, located in the atacama desert 45 kilometers (28 mi) north of the regional capital of copiapó, in northern chile.

    Get Price
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    the latest technology news, reviews & opinion from the sydney morning herald covering it, mobile, internet, social, industrial & research technology and science

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  • top 5 best bug out locations in the us survivopedia

    bugging out, or getting the heck out of dodge when calamity strikes, is a tricky matter. there are several different factors that you need to consider when choosing your spot including accessibility, vulnerability, resources and your ability to get there. today we're going to talk about the top 5

    Get Price
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  • bbc how extreme isolation warps the mind

    when people are isolated from human contact, their mind can do some truly bizarre things, says michael bond. why does this happen?

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  • strata worldwide

    strata worldwide is a global leader in mine safety solutions that promotes a safer, more productive working environment above and below ground.

    Get Price