在矿床开采过程中,破坏了岩层固有的平衡,引起岩层移动,是不可避免的现象,其规模及速度的大小,取决于地质条件、采矿方法和顶板管理方法。东北一些金属矿山绝大多数是在日本帝国主义侵入之后进行大规模开采的。自1955年以来,多发生了较大的岩层移动。首次移动距大规模开采时期大约在 In the mining process, the inherent balance of the rock is destroyed and the rock is moved. It is an unavoidable phenomenon. Its size and speed depend on geological conditions, mining methods and roof management methods. The vast majority of some metal mines in the northeast were mined after the Japanese imperialists invaded. Since 1955, a large number of rock movements occurred. The first move away from the large-scale mining period is about