煤层采后覆岩中的导水裂隙带之上存在离层带。
There exits bed separation zone above water-conducting crack zone overburden after coal mining.
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。
After raining, a dynamic Elliptic Paraboloid Zone distribution would be formed if the bed-separated fissures and broken fissures of the overlying stratum 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。
After raining, a dynamic Elliptic Paraboloid Zone distribution would be formed if the bed-separated fissures and broken fissures of the overlying stratum were connected.
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