断裂应力场数值模拟及活动性分析

Numerical Simulation and Activity Analysis of Fracture Stress Field

旨在通过数值模拟方法研究某区域的地应力场特征及其与断裂活动性之间的关系,进而分析该区域的地震危险性。通过建立一个三维模型,模拟了研究区断裂构造及岩体的实际情况,并采用特殊的处理方法来模拟非贯穿性断裂。模拟结果显示,断裂应力集中发生在断裂交会部位、端部及枢纽位置。北面平原区应力集中现象较为明显,而南面基岩区整体为受压区域,应力集中现象不明显。此外,研究了北面平原区地震多发的原因。该研究的结论对区域工程建设选址及规划具有一定的指导作用,有助于优化工程设计,降低地震灾害风险。

This study aims to investigate the characteristics of the stress field in a certain region and its relationship with fault activity through numerical simulation methods,thereby analyzing the seismic risk of the area.The research initially establishes a threedimensional model that simulates the actual conditions of the fault structures and rock masses in the study area,employing special methods to simulate non-penetrating faults.By assigning different mechanical parameters,the simulation results show that stress concentration mainly occurs at fault junctions,ends,and hinge locations.The northern plain area exhibits more significant stress concentration phenomena,while the southern bedrock area is generally under compression,with no apparent stress concentration.The reasons for the frequent earthquakes in the northen area are also studied.The conclusions of this study are of significant guidance for the site selection and planning of regional construction projects,helping to optimize engineering design and reduce the risk of earthquake disasters.