与地应力耦合的软煤巷道断面形状

The sectional shape of roadway in soft coal coupling with stress field

依据轴变论思想,结合结构力学的力学机理,研究了适应高水平应力软岩煤巷的断面形状。研究表明"平顶弧帮"形巷道围岩承载、抗弯、自稳能力均优于直墙矩形巷道。通过UDEC数值模拟,从破坏场、应力场和位移场等方面分别验证了弧墙的优越性,特别是对煤巷的两帮变形能起到更有效的控制作用。

Based on axis variation theory and structural mechanics, the study on suitable shape of roadway under high horizontal stress condition is carried out. The study shows that the shape of flat roof with curved wall has better loading, bending and self-stabilization capacity than the tunnel in a shape of straight side walls. By making use of UDEC numerical analysis on failure field, stress field and displacement field, the advantage of arc sides has been proved. The curved sides of roadway could especially control the side wall deformation.