This article presents results for the development of new methods of inserting discontinuity lines into the numerical
model of the deposit in CAD systems. The main problem in creating a numerical model of the deposit
is usually a very small number, as well as low reliability of the source data. Hence, the authors developed new
algorithms for inputting discontinuities, which can be used in particular for conditions when a large number
of discontinuities are present. The article offers algorithms for inputting discontinuities into the entire deposit
model. The method of transferring faults from the higher seam to subsequent seams and determining the course
of the fault in the entire rock mass has been described. The fault can be represented as a spatial mesh of triangles,
just like the seam floor. Then the fault can be extended until it intersects with the next seam (with the next
triangle mesh) using geostatistical methods. As a result, we determine the exact position of the discontinuity
line in the next seam. The paper also presents several algorithms for checking the deposit model made using
the methods developed by the authors, including the analysis of outliers (in terms of elevation and inclination),
testing the variability of the fault throw, checking the distance between adjacent seams, and verifying the position
of the deposit in relation to the existing workings and boreholes. It should be noted that the key issue while
building a deposit model is a checking of the model, removal of the assumptions and, obviously, incorrect data
in order to obtain the highest possible accuracy.