However, the overlyingstratum of the fault is not offset since about 50 000 years. It is concluded that the Donggang fault is not a capable fault.
但约5万年以来断层的上覆地层没有被错断，因此认为东岗断层不是能动断层。
2
After raining, a dynamic Elliptic Paraboloid Zone distribution would be formed if the bed-separated fissures and broken fissures of the overlyingstratum were connected.
综放开采后，上覆岩层中的离层裂隙和破断裂隙相互贯通后会形成一个动态变化的椭抛带分布。
3
Based on the key stratum theory, the structure characteristics and movement laws of overlying strata with different mining height are studied.