Study on design method of three-component seismic exploration & observation system in coalfield

Combined receiving longitudinal waves and converted wave on the basis of dynamite source method is currently the most prevalent way of three-component seismic exploration & observation method.Since the longitudinal wave and the converted wave differ in wave propagation path optimal image area and the relationship with reflection spot position and interfacial depth,it is difficult to design an observation system that simultaneously accepts both waves.Based on the asymmetry feature of the converted wave propagation path,the integrated planar graphic method of the converted wave observation system is proposed with reference to the integrated planar mapping method of the longitudinal wave observation system.By using this method,the relative positional relationship between the shot point and the receiving point of the converted wave and the section observed by the converted wave exploration can be visually expressed.Moreover,in order to achieve uniformity of the number of times of the longitudinal wave and the converted wave under different optimal receiving windows and different bin sizes,an observation system design method that takes into consideration both the received longitudinal wave and the converted wave is proposed.In this plan,it is necessary to ensure that the converted wave satisfies the optimal receiving window,and the number of times of coverage in the conversion point bin is uniform,and then the longitudinal wave offset is properly edited so that the longitudinal