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在建立井—含水层系统物理模型的基础上,从Biot理论的应力应变关系出发,推导了Biot介质承压含水层中由于地声扰动引起的孔隙压变化规律,揭示了封闭性好的承压含水层对地声的响应规律。结果表明,对地声的响应不仅与承压含水层的物理力学参数有关,而且与地声源频率相关。利用与机械式水位仪不同的水听器可在深井中记录到地壳微破裂发出的地声信息。这对捕捉微破裂这种地震短临前兆具有重要意义
Based on the physical-model of well-aquifer system and the stress-strain relationship of Biot theory, the pore pressure variation induced by ground acoustic disturbance in Biot medium is deduced, and the confining pressure Response of Aquifer to Ground Acoustic. The results show that the response to ground acoustics is not only related to the physical and mechanical parameters of the confined aquifer but also to the ground source frequency. Using a hydrophone different from a mechanical water level gauge, ground acoustic information from micro-fractures of the crust can be recorded in deep wells. This is of great importance to capture the short-term precursory earthquake such as micro-fracture