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- Exposing an orebody by means of development openings, on at least three sides, in preparation for continuous extraction; the opening of a deep lead deposit. See also: block
- As applied to coal reserves, acquiring coal and mining rights in contiguous areas to form a continuous area and in a desirable shape for planned future mining.
- Aust. Laying or staking out gold-bearing gravel deposits in square blocks in order to facilitate systematic washing.
- In economic geology, delimitation of an orebody on three sides in order to develop it, i.e., to make estimates of its tonnage and quality. The part so prepared is an ore block. AGI
Source: Dictionary of Mining, Mineral, and Related Terms