老顶来压是长壁工作面上覆岩层变形、移动、破断运动过程的显现,往往使工作面冒顶、支架折断,甚至发生恶性事故。因此,它是评定工作面开采时矿压显现的主要特征。近年来,随着矿压控制理论研究的深入,已认识到,要维护好采场顶板的稳定性,必须正确地认识采场上覆岩层运动的规律,使所谓采场的小“支护结构”适应开采中上覆岩层可能形成的“大结构”,才能合理确定采场的支护形式与顶板管理方法。试验证明,在一定顶板管理方法的条件下,工作面支护能改善工作空间顶板状况,但对工 Old top pressure is the deformation of the overlying strata of the longwall face, moving, breaking the movement of the show, often make the face fall, the stent broken, and even a vicious accident. Therefore, it is to assess the main features of the mine pressure show when mining face. In recent years, with the deepening of research on rock pressure control theory, it has been recognized that in order to maintain the stability of stope roof, we must correctly understand the law of overlying strata movement in stope and make the so-called small supporting structure “To adapt to the mining overburden strata may form a” big structure "in order to reasonably determine the stope support forms and roof management methods. Experiments show that under the conditions of a certain roof management methods, face support can improve the working space roof conditions, but to workers