Magma intruding into coal seams in forms of dikes and sills made coal seam splitting,thinning even thoroughly corroded off,thus destructed coal seam continuity and integrality.
英
美
- 岩浆以岩脉和岩床形式侵入煤层,使煤层出现分叉、变薄甚至全部被吞蚀。