The uppermost mechanical characteristic of FMTC face is lying in the low stress area under stress shell.It is essential cause of strata behaviors of FMTC face relaxation, as well as.

• 综放工作面主要力学特征是位于上覆围岩宏观应力壳保护下的低应力区内，这正是综放工作面矿压显现趋于缓和的根本原因。