"Kinks" and "kink zones" are fracture zones that form after mining, usually along the center of an entry, from compressive forces that cause the immediate roof strata (in shale roofs) to impinge upon each other or "kink" (Krausse and others, 1979; Nelson, 1983).

Kink zone along midline of a passage in a Springfield (W. Ky. No. 9) coal mine.




Last Modified on 2018-06-22
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