The irreversibility of coal or rock EME process is the direct reason why EME during the deformation and fracture of coal or rock has memory effect.

• 煤岩损伤破坏过程的不可逆决定了电磁辐射过程的不可逆，电磁辐射过程的不可逆是煤岩变形破坏电磁辐射记忆效应的直接原因。