Аңдатпа
The article deals with the issues of geomechanical justification of permissible roof spans of chambers at the Zhaman-Aybat deposit. The actual statistical data and analyses for the primary and secondary extraction of ore reserves are presented. A physical model of the process of destruction of the immediate roof is selected. A calculation scheme has been developed for numerical simulation of the stability of the thin-layered roof of the treatment chambers. The simulation was carried out using the Phase 2 program (RocScience, Canada). The simulation shows the roof stratification due to the difference in the displacements of different layers. Numerical modeling has shown that reducing spans is an effective way to ensure the stability of the roof of the chambers, which, as shown by the 12-year experience of the Jomart mine, is the weakest element of the development system in these mining and geological conditions