College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
Sci Rep. 2023 Mar 8;13(1):3846. doi: 10.1038/s41598-023-30792-9.
The rock mass around deep roadways has obvious creep characteristics in high-stress environments. Meanwhile, the cyclic impact load induced by roof fracturing also causes dynamic damage to the surrounding rock, leading to long-term large deformation. This paper examined the rock mass deformation mechanism around deep roadways based on the theory of rock creep perturbation effect considering perturbation sensitive zone. This study proposed a long-term stability control guideline for deep roadways under dynamic load. An innovative support system was developed for deep roadways, with concrete-filled steel tubular support being recommended as the main supporting body. A case study was conducted to validate the proposed supporting system. Monitoring over one year in the case study mine showed that the overall convergence deformation of the roadway was 35 mm, indicating that the roadway's long-term large deformation induced by creep perturbation was effectively controlled by using the proposed bearing circle support system.
深部巷道围岩在高地应力环境下具有明显的蠕变特征，同时，顶板断裂诱发的循环冲击荷载也会对围岩造成动载损伤，导致长期大变形。本文基于考虑扰动敏感区的岩石蠕变扰动效应理论，研究深部巷道围岩变形机理，为动载下深部巷道的长期稳定性控制提供指导。提出了一种深部巷道的新型支护系统，推荐采用钢管混凝土支护作为主要支护体。通过工程实例验证了所提出的支护系统的可行性。该矿的一年多监测结果表明，巷道整体收敛变形为 35mm，表明采用所提出的承载圈支护系统有效控制了蠕变扰动引起的巷道长期大变形。
