1.Stress shell, which bears and pass load of overlying strata, is primary supporting body.The stress in skewback of stress shell forms abutment pressure of surrounding rock in vicinity of working face.
应力壳但并传递上覆岩体荷载和
力,是最主要的
载体,应力壳拱脚处应力形成采场四周围岩
力。