关键词: 三心拱, 椭圆拱, 巷道断面, 位移特征, 应力特征

Abstract: Through analyzing the difference of size error and displacement characteristics and stress distribution of tunnel section between the elliptical arch and three centered arch by the theoretical calculation and numerical simulation method, in order to study the feasibility of elliptical arch instead of three centered arch section tunnel. Research shows that three centered arch and elliptical arch tunnel section size is far smaller than the error which required in the coal mine safety quality standardization assessment rating methods. The displacement characteristics of two kinds of roadway is basically the same. The elliptical arch section tunnel vertical stress and horizontal stress is smaller than three centered arch In the superficial roadway surrounding rock,but the stress of the elliptical arch section tunne is increased ratio bigger than three centered arch along the direction of deep surrounding rock. Therefore, it is feasible that elliptical arch section instead of three centered arch section tunnel.

Key words: three heart arch, ellipse arch, tunnel, numerical simulation