The Bedrock Of Shaft Lining Stress Mechanism Analysis

In recent years, with the deepening of the development of the coal mining, expanding the depth of exploitation are increasing. In the bedrock, the requirements also increase the security and stability of the bedrock section of shaft lining. Bedrock section vertical shaft through the rock, and its stability are very different. Jointed surrounding rock offten exert great pressure on the Shaft lining, resulting in the shaft wall damage. The article focuses on the bedrock jointed wall rock on the sidewall imposed ground pressure. Jointed soft rock means the rock of argillaceous composition, development of multiple joints, the higher the intensity of rock, was the hard rock mechanical properties, but the entire project showing a rock mass under the action of forces in the underground construction characteristics of soft rock.Through theoretical analysis, model tests, numerical calculation of the three bedrock section of shaft lining of the stress mechanism and joints surrounding rock of the borehole wall by the force. First of all, suffered through the sidewall load, jointed rock mechanical properties of the theoretical analysis, analysis of the bedrock segments jointed suiTounding rock and the wall of a common mechanism of action and the sidewall force; established according to the principle of similarity theory and model test surrounding rock and the borehole wall test model by model tests to study the jointed surrounding rock containing different inclination of the joints surface sidewall structure model of the deformation characteristics; Finally, large-scale numerical simulation software FLAC3D. At the same time selected throughout the joint model as a jointed wall rock of this structure relational model, deformation and force characteristics of the bedrock section of shaft lining structure. Field measurements of the Sun Tuan Coal Mine Shaft Projects, to further verify the characteristics of the force of the bedrock section of shaft lining. The results of this study provide a reference, and the construction of the future bedrock segments mine.