Deformation and failure law of roadway with different section dimensions under complex stress conditions
Taking the deep mining situation of Sanshandao Gold Mine as a research background,based on the on-site measurement results,the FLAC3D numerical analysis software has been used to simulate the thousand-deep roadways with different section sizes,aiming to study the stress and deformation characteristics of surrounding rock of roadways with different section sizes under complex stress conditions.The results show that with the increase of the cross-section size of the roadway,the stress continues to concentrate in the deep surrounding rock.The maximum and minimum principal stresses around the roadway generally increase with the increase of the roadway section size.The change trend of the maximum principal stress is greater than that of the minimum principal stress.In different section sizes,the vertical principal stress distribution is concentrated on the two sides of the roadway,while the horizontal principal stress distribution is concentrated on the roof of the roadway.In addition,the size of the roadway significantly influences the deformation of the surrounding rock of the deep roadway.With the increase of the cross-section size of the roadway,the deformation around the roadway increases.
deep miningroadwaysection dimensionnumerical simulationstressstress distributiondeformation
万方数据
维普
