关键词: 深部高应力, 破坏特征, 钢管混凝土, 支护荷载

Abstract: To address the difficulty in supporting deep and high-stress roadways，traditional support methods have become inadequate to meet the on-site demands of coal mines The failure phenomena of a cer⁃ tain roadway under the original support conditions were analyzed in detail. It was summarized that deep high-stress roadways have failure characteristics such as large deformation amount and high initial deforma⁃ tion rate，and the support ideas under the existing support technology conditions were sorted out. In view of the insufficient strength of the original support，an innovative proposal was made to use concrete-filled steel tube supports for optimized support. Based on the actual cross-section of the roadway，a support method of straight wall semi-circular arch and reverse bottom arch support was designed，giving full play to the advan⁃ tages of concrete-filled steel tube supports such as high bearing capacity and good adaptability and load cal⁃ culation for the optimized support method was carried out. The results show that the bearing capacity provid⁃ ed by this support method is greater than that required by the roadway，which can effectively meet the sup⁃ port requirements of deep high-stress roadways and is of great significance for improving the stability and safety of the roadway. At the same time，it also provides support design and construction for similar projects. It provides useful references.

Key words: deep high stress, failure characteristics, concrete-filled steel tube, supporting load