The intrusion of magmatic rocks into the coal seams is very popular in the coalfields, the authors tried to outline the intrusion coal seam range by multi-parameter curves.

• 煤田中岩浆岩侵入煤层现象普遍存在,针对这一问题,进行了尝试,提出利用多参数曲线来圈定岩浆岩侵入煤层的范围。