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 Using the equivalent wave impedance method, the numerical analyses were given about uncoupling coefficient's effects on transfer course of explosive pressure and energy on hole wall in water coupling blasting. The result was verified by the experiments of blasting fragmentation and fracture law on water coupling blasting at different coupling coefficients. This result is valuable to the project design on water coupling blasting under different conditions.  ＳＴＲＥＳＳＡＮＤＥＮＥＲＧＹＴＲＡＮＳＦＥＲＯＦＷＡＴＥＲＣＯＵＰＬＩＮＧＢＬＡＳＴＩＮＧ①ＺｈａｎｇＱｉａｎｇＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＭｉｎｉｎｇ＆Ｍｅｔａｌｕｒｇｙ，Ｂｅｉｊｉｎｇ１０００４４，Ｐ．Ｒ．...  The λ \04 film system with periodic medium layers is studied by wave impedance method with some calculated results to ZnS\MgF\2 λ \04 film system of different layers. Basing on calculated results in theory, a bigger index of reflection is obtained with a complex reflection coefficient Γ\0(0) close to 1 when λ \04 film system of odd number layers is used with more layers and bigger ε\hε\l ; bigger index of reflection is obtained with a complex reflection coefficient Γ\0(0) close to... The λ \04 film system with periodic medium layers is studied by wave impedance method with some calculated results to ZnS\MgF\2 λ \04 film system of different layers. Basing on calculated results in theory, a bigger index of reflection is obtained with a complex reflection coefficient Γ\0(0) close to 1 when λ \04 film system of odd number layers is used with more layers and bigger ε\hε\l ; bigger index of reflection is obtained with a complex reflection coefficient Γ\0(0) close to +1 when λ \04 film system of even number layers is used with more layers and bigger ε\hε\l . The change of index of reflection of even number layers is found to be slower than that of odd number layers.  用波阻抗方法对具有“周期”性介质层的 λ。4 膜系进行了研究 ,对不同层数的Zn S Mg F2λ04 ( λ0 =0 .4 6 μm)膜系给出了一些计算结果 ,由计算结果可见 ,当采用奇数层 λ04 膜系 ,层数愈多 ,比值 εhεl较大时 ,反射系数 Γ0 ( 0 )接近于  1 ,反射率愈大 ;当采用偶数层 λ04 膜系 ,层数愈多 ,比值 εhεl较大时 ,反射率愈大 ,但较奇数层变化缓慢 ,反射系数Γ0 ( 0 )接近于 + 1 .  At present the inductance model calculation method of transmission towers adopted in China for the towers being struck is remarkably different from the versatile wave impedance method calculation adopted in other countries, and there are obvious differences between the calculation results of the two methods. The similarities and differences of the induced surge on overhead line when lightning strokes the ground near overhead line (indirect lightning) and lightning strokes... At present the inductance model calculation method of transmission towers adopted in China for the towers being struck is remarkably different from the versatile wave impedance method calculation adopted in other countries, and there are obvious differences between the calculation results of the two methods. The similarities and differences of the induced surge on overhead line when lightning strokes the ground near overhead line (indirect lightning) and lightning strokes tower (direct lightning) are researched. On this basis it is summarized that coupling mechanisms of induced surge on overhead line for two kinds abovementioned light stroke are different, one is the coupling through electromagnetic field and another is the coupling through electric circuit. But the impact of lightning on overhead line reflects the influence of charge and current in the lightning channel on overhead line, so these two mechanisms are unified under certain specification and in practice the influence of the two coupling mechanisms should not be repetitively considered. Besides, it is pointed out that in the lightning performance computation the calculation error of inductance model is caused by the voltage loss that is brought about by the differential response of inductance to current. Finally, case calculation is performed and the conclusion of abovementioned analysis is further verified.  目前国内雷击杆塔时的电感模型计算方法与国外通用的波阻抗计算方法有很大不同,计算结果出入较大。文章探讨了雷击架空线路附近地面(感应雷)与雷击杆塔时架空线上产生的感应过电压的异同点,认为二者,一个主要是电磁场的耦合,一个主要是线路的耦合;但雷电对架空线的影响都体现在雷电通道中电流和电荷对架空线的影响。场路耦合是统一的,实际应用中不能重复计算这两种影响。此外电感模型的计算误差是由电感对电流的微分响应造成电压损失产生的。并用工程实例计算结果证明了上述结论的正确性。  
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