Abstract Based on the calculation of the pore pressure distribution and the measured water level fluctuation of nine fluid wells in Tangshan area before, during and after the Guye MS5.1 earthquake. The results show that: 1) Before the earthquake, the Guye area of Tangshan was in the process of stress accumulation, the compression area was nearly in the east-west direction, and the tension area was nearly in the north-south direction. The measured well water level rise and fall were basically consistent with the compression and tension. 2) During the earthquake, the compression and tension areas do not change, but the stress is released. The measured well water rise and fall are inconsistent with the compression and tension. 3) After the earthquake, the compression area evolves into the tension area, and the tension area evolves into the compression area. This paper explains the adjustment process of seismic static stress from pre earthquake to post earthquake. By calculating the distribution of well bore pressure before, during and after the earthquake, we find that the distribution of well bore pressure is in four quadrants around the fracture zone of the strike slip fault, which can be explained by the locking shear model before the earthquake.
DONG Bo,JI Chunling,YANG Donghui. Analysis of Seismic Static Stress and Response of Well Water Level and Pore Pressure: A Case Study of Tangshan Guye MS5.1 Earthquake[J]. jgg, 2022, 42(3): 321-325.
DONG Bo,JI Chunling,YANG Donghui. Analysis of Seismic Static Stress and Response of Well Water Level and Pore Pressure: A Case Study of Tangshan Guye MS5.1 Earthquake[J]. jgg, 2022, 42(3): 321-325.