a. 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.
b. 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.
c. Timber formwork to contain the material during hydraulic flushing in
steep ore workings. Nelson
Dictionary of Mining, Mineral, and Related Terms