Research On The Internal Stress Distribution And Strength Design Of In Mouska Gold Mine

In order to achieve the double design targets of tailings paste backfill including the safety ofunderground mining production and decreasing the cost of backfill to increase the economic profitfor mines, the paper conducts a series of research based on the in-situ production condition and thetailings paste backfill technology used in Mouska gold mine. The research first establishes thepredicting model of binder hydration based on the analysis and measurement of mechanicalproperties for the materials of tailings paste backfill. Meanwhile, the paper also constructs theempirical evolutive models for the UCS and cohesion of tailings paste materials. In order todetermine the key role of mechanical action for tailings paste backfill in stope, the relationshipbetween paste backfill mass and surrounding rock is analysed. Most importantly, the paperproposes a3D mechanical model to predict the internal stress distribution in tailings paste backfill.To validate the3D model, the in-situ stress of tailings paste backfill is measured in7-1WS stope ofMouska gold Mine. Through the comparison of measured values and predicted values of internalstress for backfill mass, the regularities of stress distribution are obtained and the3D mechanicalmodel is verified. The mechanical model is employed to design the strength of tailings pastebackfill. It has been proved that the strength design strategy of mechanical model is effective andcan achieve the double design targets through the comparison with three other common usedstrength design methods of tailings paste backfill.