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构建地震物理模型是模拟地质结构的重要手段,但是由于实际地质情况的结构多样性和物质多样性,导致探测信号的传播速度具有较大的分布范围.因此,为了对实际地质情况进行有效模拟,需要实现地震物理模型材料传播探测信号速度的可控调节.本文采用环氧树脂作为基材,使用硅微粉对其进行掺杂改性,制备出传播探测信号速度达到2850 m/s的有机-无机复合型模型材料,并实现了传播探测信号速度在2500~2850 m/s范围内的可控调节.研究表明,当使用硅微粉对环氧树脂进行掺杂时,其传播探测信号的能力得到明显提升;当掺杂量为50%时,模型材料传输探测信号的速度达到最大值2850 m/s,并且信号的振幅由纯环氧树脂的180 m V提高至420m V,这一结果将有利于该材料在大尺寸模型中的应用.除此之外,由于对制备工艺进行了优化,尤其是对固化剂进行了筛选,使得所制备的新型地震物理模型材料具有良好的稳定性,单次浇筑量大.当模型尺寸达到150 cm×120 cm×90 cm时,模型材料仍能保持良好的稳定性和均一性,未出现开裂等不良情况,该模型材料的开发将有利于地震物理模拟的相关研究.
Construction of seismic physical simulation model is an important means of geological structure, but because of the diversity of materials and structural diversity of the actual geological conditions, resulting in the propagation velocity detection signal having a large distribution. Thus, in order to effectively simulate the actual geological conditions, It is necessary to realize the controllable adjustment of the signal velocity of the seismic propagation in the seismic physical model.In this paper, epoxy resin was used as the substrate and doped with silicon micro-powder to modify and prepare the organic-inorganic Composite model material and realize the controllable regulation of propagation detection signal speed in the range of 2500 ~ 2850 m / s.The results show that when using epoxy resin doped with silicon powder, its ability to spread the detection signal is obvious ; When the doping amount is 50%, the velocity of the model material transmitting the detection signal reaches a maximum of 2850 m / s and the amplitude of the signal increases from 180 mV to 420 mV of the pure epoxy resin, and the result is beneficial to In addition, due to the optimization of the preparation process, especially the screening of the curing agent, the new earthquake prepared The model material has a good stability and a large amount of pouring.When the model size reaches 150 cm × 120 cm × 90 cm, the model material can still maintain good stability and uniformity, no cracking and other adverse conditions, the The development of model materials will be helpful for the related research of seismic physical simulation.