Study on the Influence of Roadway Structural Morphology on the Mechanical Properties of Weakly Cemented Soft Rock Roadways

We used the 11,303 return air roadway of Hongqingliang coal mine as engineering background for a study exploring impact structural morphology on stress distribution characteristics and stability weakly cemented soft-rock roadway. This work studies evolution law deformation, plastic zone roadways with retaining top or bottom seams. The results show that when is replaced by coal, high-stress vertical reduced, peak decreased, concentration coefficient slightly reduced from 1.67 to 1.64. value displacement roof shaft which was 78.4% also decreases significantly, while floor, 1.37 times increases. equal area method change aspect ratio When decreased 1.38 0.88, 1.8 1.75. increased 27.7% 10.91 mm 13.93 mm, floor 15.2% 6.60 7.60 mm. failure range significantly particularly at corners. These findings has great influence heave soft rock. Reasonable retention can prevent deformation in