Parameter analysis of anchor bolt support for large-span and jointed rock mass^①

来源期刊：中南大学学报(英文版)2005年第4期

论文作者：李夕兵 周子龙 李启月 胡柳青

文章页码：483 - 487

Key words：jointed rock mass; anchor bolt support; optimal parameter

Abstract: In order to obtain the optimal parameters of anchor bolt supporting system for large-span and jointed rock mass in Kaiyang Phosphor Mine, it is expensive and unavailable with the method of in-situ experiments. This paper describes a numerical modeling with discrete element method for the supporting effects of different type of anchor bolts. The anchor bolts with variant length of 0.5 m, 0.8 m, 1.0 m, diameter of 10 mm, 15 mm, 20 mm, setting spacing of 3.0 m, 2.5 m, 2.0 m, and setting angle of 10°, 20°, 30°, are simulated respectively. The results show that there exist optimal parameters of anchor bolt support for large-span and jointed rock mass. For the bolt support of the concerning, the optimal length is 2.5 3.5 m, the diameter is 25 35 mm, the spacing is 0.5 0.6 m, and the setting angle is 105°.