It is mainly distributed in the area with complex structure,with distribution direction identical to the st rike of faults in the area,and is accompanied with one or several faults.

• “无煤带”是指煤层缺失变薄至不可采的地带或条带,多分布于构造复杂地区,且与该地区断层走向一致,均伴有一条或几条断层。