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- The process of building a set of barriers to isolate a sufficient quantity of good air to protect mine workers from the asphyxiating gases formed after a fire or explosion. Miners wait behind the barrier until rescued. Used as an alternative to an escape attempt.
- An artificial mound of earth, usually as high as the eaves of a magazine roof, that is erected to deflect the force of an explosion upward and to protect the enclosed building from flying objects.
- Timber formwork to contain the material during hydraulic flushing in steep ore workings. Nelson
Source: Dictionary of Mining, Mineral, and Related Terms