Bearing capacity and loading characteristics of U-steel cross support structure
In view of the problems that the U type steel supports have poor overall stability and uneven structure in practical application, a new type of U type steel cross support which is suitable for soft rock entries is presented.Based on the results of similarity and numerical simulations, this paper analyzes and compares the unstable failure characteristics of conventional and new type cross supports in terms of bearing behavior in service and the control effect of surrounding rocks.The experimental results showed that the main mode of failure is conical column bending deformation when it was tested under a loading rate of0.05Mpa/30min.When the loading rate is 0.002 Mpa/s, the supports are prone to have bearing failure of roof beam and overall out-of-plane instability.The structure in the cross arrangement will strengthen the overail stiffness of the supports and the bearing capacity along the entry direction.The bearing capacity of support and the control effect of surrounding rocks are increased substantially.
soft rock arm support similarity experiment numerical simulation
Guo Dongming Wu Shang Yang Renshu Li Xuebin
School of mechanics and civil engineering, China University of Mining and Technology (Beijing) , Bei School of mechanics and civil engineering, China University of Mining and Technology (Beijing) , Bei
国际会议
The 34th International Conference on Ground Control in Mining (ICGCM) 2015(34届国际采矿岩层控制会议)
焦作
英文
37-41
2015-10-17（万方平台首次上网日期，不代表论文的发表时间）