Abstract：
Based on an indoor gypsum model test, this paper discusses the span and height, as well as the area of collapsed arches of surrounding rock with joint spacings of 0.5 m; dip angles of 0°, 30°, 45°, 60°, 90°; and without support. Compared with the values of the Platts theory, there is a nonlinear relationship between the joint dip angle and the collapse height, width, and area, with the minimum values occurring with angles of 45°~60°. The test results are consistent with the calculated ones according to a 2D numerical analysis of the above conditions with UEDC software. Based on a comprehensive analysis of numerical calculations and indoor test results, a calculation method for collapsed arch heights under different joint dip angles is obtained.
LIU Xue-Zeng-1,
LIU Wen-Yi-2,
3 etc
.Effects of the Joint Dip Angle on the Collapsed Arch of Surrounding Rock Around a Highway Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(6): 73-77
2014, Vol. 51 