Abstract：In order to study the relationship between mechanical properties and permeability of faults,F₂₉fault was selected as research object,through the study of mechanical properties on faults and analysis of modern tectonic stress field,the relationship between mechanical properties and permeability of faults were studied.It's drawn the conclusion that F₂₉was a fault with weak permeability.Furthermore,the conclusion was validated through the drilling hole data,pump water data,and transient electromagnetic water exploring test data.

Keyword：fault;mechanical properties;permeability;regional tectonic stress field;modern tectonic stress field;