RECOMMENDATIONS FOR SUPPORTS OF MINE WORKINGS IN UNDERGROUND MINING

https://doi.org/10.48498/minmag.2023.215.3.005

The exploration of mine workings and analysis of the underground mining documentation have been resulted that the maximal volume of inrush was observed during the roadway driving along the strike with impact angle of Δ = 0°, and the minimal volume of inrush was found during the crosscutting with impact angle of Δ = ±90°. By reason of the insufficient efficiency of the applied shotcrete supports, the rock inrush in the working area could lead to the high risks of injury to the miners in the breakage and drifting faces, the detachment of rock slabs from the side walls or roof of the workings during the gadding, support and loading. In order to reduce the high risks, the pilot tests of MasterRoc STS 1510 shotcrete mix have been performed. The results have demonstrated that this mix is suitable and recommended to use in the mining as an independent support and as part of the anchor structure and metal mesh.

*A.G. Akpanbayeva, T.K. Isabek