Numerical simulation study on high strength U-type steel supporting in soft coal seam return airdrift
Abstract：Based on the typical geological conditions of soft floor in ZhuJiao coal mine of Yongcheng Coal Group, the paper proposes that numerical simulation method with FLAC3D can be used to study the stability of surrounding rock with the U29 type high strength steel supporting the roadway compared with bolt-shotcrete supporting, and concludes the change law of stress, displacement and plastic region. During the field measurements to U29 type steel supporting, observation stations were set following the roadway driving , and deformation of surrounding rocks and forced state of supporting were inspected timely. The results show that the deformation and failure of surrounding rocks are controlled efficiently by the U29 type high strength steel supporting, and its structure is stable and reliable which provides a theoretical and field basis for stabilization of goaf-side entry selection of rational supporting methods.
Keywords：bolt-shotcrete supportingU29 type steel supportingsoft coal seam
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 279-284 )