A central issue in the mine planning process of the Bürgl mine is the regional stability and the design of the extraction areas. In this context, the calculation of the mine panel spans plays a central role with regard to the stability of the mine panels and the extraction ratio. The calculation of mine panel spans is a significant and complex topic and is therefore the focus of this master thesis. Existing calculation methods are tested for their applicability at the Bürgl mine and a DEM model (Discrete Element Method Model) to calculate mine panel spans is developed. The applicability of available calculation methods depends on the type of mine panel and the present rock mass. Therefore, the thesis analyzes different mine panel types and their corresponding load dissipation concepts as well as the corresponding calculation models and examines their applicability at the Bürgl mine. In the course of this, it is determined that no existing calculation model is applicable there. This is justified with the restrictions of the existing methods to consider the rock mass structure and the local supporting effects of pillars accordingly. Therefore, a numerical DEM model is developed, which can take these aspects into account and which can be used to calculate mine panel spans. The core element of the numerical model is a beam consisting of rock mass which forms over the mine panel and which transfers the load into the abutments and into massive barrier pillars. Due to the numerous influencing parameters, a detailed parameter study is carried out in which essential model mechanisms and trends are identified. Based on this, the model is validated by means of two case studies. The findings from the parameter study and the model validation are then combined and the calculations for the Bürgl mine are performed. Thereby, in order to deal with uncertainties in practice, the mining sequence and an accompanying monitoring program are discussed.