An evaluation of the support resistance capacity of a void fill rib based support system was done in a conventional Merensky stoping face at RPM Rustenburg section, Turffontein shaft. The project was a sub component of a larger project evaluating the feasibility of replacing ventilation curtains by a cement-based product. This paper describes the conceptual thinking as well as the practical installation of a cement based void fill rib in an actual working stoping environment. Data was collected in order to objectively evaluate the void fill rib support performance. The void fill rib support performance was evaluated against the currently used grout pack based support system(s), taking into account load generated, the timing of the load generated and costs, demonstrating the system to be viable, although the financial feasibility work requires further refinemen.