龙桥铁矿地下深部采场岩爆倾向性预测评价与防治OA

To evaluate the rockburst proneness of the surrounding rock in the deep stopes of Longqiao Iron Mine,representative rock samples collected from the deep mining area were subjected to laboratory mechanical tests to ob-tain the corresponding mechanical parameters and stress-strain curves.Based on the rock brittleness index criterion,the Gu-Tao rockburst criterion,and the linear elastic energy criterion,a comprehensive analysis was conducted,and corresponding rockburst prevention and control recommendations were proposed for deep mining operations.The re-sults indicate that,except for the linear elastic energy criterion which shows moderate rockburst proneness in sand-stone sections,all other criteria demonstrate that when mining reaches the-490 m level,the deep rock mass of Longqiao Iron Mine exhibits either no or weak rockburst proneness,with favorable regional stability.Therefore,for the deep stopes of Longqiao Iron Mine,bolting-mesh-shotcrete support can be adopted at the current stage for overall ground control,while monitoring and early warning should be strengthened in sandstone sections to implement a closed-loop dynamic risk management system,thereby achieving effective control of rockburst risks and ensuring safe and efficient deep mining.