ABSTRACT
To effectively avoid the deviation in the generalization of rock mass structure, this paper develops a discrete element calculation method based on on-site rock mass fine structure mapping, by which abundant numerical tests can be directly carried out on the rock mass structure models (mostly including intermittent joints) obtained from field survey. The on-site rock mass structure sketch drawing is first transformed into CAD drawing, and then the data are imported into UDEC software by self-made software to establish the two-dimensional discrete element window rock mass model. At the same time, according to the field test and indoor test results, the mechanical parameters of rock block and joint surface are sorted out and assigned to the numerical model. When different loading conditions are changed, the failure mechanism of rock mass and mechanical parameters of related engineering applications can be analyzed economically and quickly. The result will promote the development of engineering parameter risk prediction and reliability analysis in hydropower project construction.
