运用相似模拟实验,以平煤矿区主采煤层丁、戊组煤岩为原型进行研究,发现随着远距离保护层的开采,顶板覆岩裂隙区经过了卸压、失稳、起裂、张裂、裂隙萎缩、变小、吻合、封闭的演化过程;上覆岩层由下而上非线性下沉,且移动形态非对称,这种演化过程直接影响了采空区内瓦斯的解吸、流动及储集。 Using similar simulation experiments, taking the main coal seams Ding and Pei in the Pingdingshan coal mine as the prototype, it is found that with the exploitation of the long-distance protective layer, the cracks in the overlying strata of the roof have been subjected to relief, instability, The evolution of the overlying strata from bottom to top nonlinearly sinks, and the movement is asymmetric. The evolution directly affects the desorption and flow of gas in the goaf And storage.