a. A sudden escape of gas from coal or associated strata into mine workings. See also: outburst b. A large outcrop of ore, commonly of low grade. Nelson c. To lift: said of a floor that lifts owing to pressure from gas or strata. Mason d. In blasting, a shot that blows part of the unfired explosive out of the hole. See also: blown-out shot e. To fire shots. Mason Source: Dictionary of Mining, Mineral, and Related Terms
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