Geological forecast detection fault two-dimensional numerical simulation method

The invention belongs to the technical field of tunnel geophysical exploration, and provides a geological forecast exploration fault two-dimensional numerical simulation method, which comprises the following steps of: carrying out numerical calculation on a model by utilizing an unequal-distance grid difference method, carrying out numerical simulation by adopting a PML absorption boundary and continuous iteration speed and stress, and outputting a seismic wave field and a seismic record. According to the method, the accuracy of tunnel advanced geological forecast detection numerical simulation can be effectively improved. 本发明属于隧道地球物理探测技术领域，提供一种地质预报探测断层二维数值模拟方法，利用不等距网格差分法对模型进行数值计算，采用PML吸收边界，不断迭代速度和应力进行数值模拟，输出地震波场和地震记录，该方法能够有效的提高隧道超前地质预报探测数值模拟的准确性。