This command selects as a parameter the fracture spacing which is a parameter of the MINC preprocessor (TOUGH2 variable PARMINC(I)). The fracture set is identified through command >>>> INDEX. This parameter refers to the entire model. Estimating fracture spacing is only possible if the mesh can be generated internally without further editing by the user. Single elements and connections can be modified, however, by means of TOUGH2 commands ELEM2 and CONN2, respectively. For example, if a mesh is generated using MESHMAKER and MINC, the volumes of individual boundary elements can be adjusted in the ELEM2 block, i.e., avoiding the need for external editing.
>> MINC parameter
>>>> ANNOTATION: Fracture spacing
>>>> INDEX : 1 2 3 (one value for all three fracture sets)
>>>> GUESS : 50.0 [m]
>>>> DEVIATION : 10.0 [m]