EX3 is stress analysis software that uses the Boundary Element Method for analyzing large, complex 3D underground models. It includes features such as 3D modeling, geometry import and creation, geometry repair tools, multiple staging for excavation and backfill, automatic surface meshing, and creation of field points for stress computation. It also includes innovative tools such as improved surface meshing and a grouping function for analyzing mining sequences. EX3 is ideal for quickly performing complex stress analyses of underground mines.