采场控顶设计是顶板管理的关键因素，而顶板岩层的运动规律是采场控顶设计的依据。
The roof control design in mined field is the key to roof control and the movement rule of roof terrane is the basis of the roof control design.
此外，厚松散层、地表采动程度、工作面推进速度、采煤方法与顶板管理方法、开采程序及时间因素等对采场覆岩空间结构均有一定影响。
Moreover, there are some other influencing factors such as: thick loose bed, surface mining degree, impel speed of working face, coal mining and roof manage methods, mining procedure and time.
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