三山岛金矿深部高应力节理化巷道围岩控制技术研究.

With the depletion of shallow mineral resources, deep mining has become an important part of the mining industry. One of the key characteristics of deep mining is the dramatic deterioration of geological conditions in mining engineering under the influence of "three highs and one disturbance". The surrounding rock exhibits significant jointing, which brings great challenges to the control of deep tunneling. Taking the typical jointed tunnels below-900 m level in Sanshandao Gold Mine as the engineering background, this study conducted engineering geological investigations, literature surveys, and laboratory rock mechanics tests to obtain basic data. The Dips software was used for structural plane grouping, and the Unwedge software was employed for wedge analysis and stability assessment. The Rock Mass Rating（RMR), Q, and Geological Strength Index（GSI） methods were used to classify the rock mass and estimate its mechanical parameters. The mechanism of discontinuous face reinforcement with rock bolts was elaborated, and the required support pressure for tunnel support was estimated. Based on the Q and RMR support charts, a support scheme was designed, and its effectiveness was validated using RS2 numerical modeling. Industrial experiments were conducted at the-960 m level, and the results demonstrated that the designed support scheme effectively controlled the deformation and failure of deep high-stress jointed surrounding rock in tunnels, providing a basis for safe and efficient mining in deep mines. [ABSTRACT FROM AUTHOR]