During themining of the face using fully-mechanized top -caving method, the oblique face length is seen to be increased due to variation of dip angle of seam.

• 介绍了在"三软"不稳定厚煤层综放工作面回采过程中,由于煤层倾角变化造成切巷长度增加后,所采用的增加液压支架及前后部输送机延伸的技术。