The singularities of ground Penetrating Radar (GPR) echo wave signals can show the characters of objects or the layer structures under the ground sufficiently.

雷达回波信号奇异点携带了大量地下目标物的信息，是借以分析地下物质结构的重要依据。

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Through the seismic wave exploration by us in A2 and A3 working faces, the conditions, velocity, frequency and penetrating distance of seismic wave in the main mining seams are understood preliminary.

通过在A 2、A 3两个面的槽波探测工作，初步了解了其主采煤层的槽波条件、波速、频率和槽波穿透距离。

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Methods: in view of the radioactive rays wave length, the penetrating power, the fluorescence function, the photographic function and the biological effect to analyze radio formation a mechanism.

方法：针对放射线的波长、穿透力、荧光作用、摄影作用和生物效应分析放射性形成机制。

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