With the continuous development of underground engineering to the deep, complex geologic conditions such as high stress, extremely soft rock and fault fracture zone usually occurred in the construction process. The accurate calculation of confined concrete arch bearing capacity is the key to support design. At present, the theoretical value of the bearing capacity for the confined concrete arch is oppositely deduced according to the axial compression bearing capacity of basic component, and the bending moment effect of surrounding rock on arch is neglected. It does not consider the structural characteristics of inconsistent stiffness between the arch joints and segments. To obtain accurate calculation results, a theoretical calculation model of arch with arbitrary section numbers and unequal stiffness is established. By the full-scale laboratory and numerical tests, the deformation and failure characteristics of the confined concrete arch are analyzed. The results show that the vault position, bottom position and waist position are the key failure positions of the arch. The difference rates of theoretical calculation results compared with laboratory test results of ultimate bearing capacity are within 5%, which verifies the rationality and correctness of theoretical calculation model. On the basis of the above research, the support design method of confined concrete arch is proposed. The support parameters of on-site confined concrete arch are designed based on the engineering background of the typical deep mine with high stress—Liangjia coal mine located in China. The surrounding rock of the roadway is stably controlled.

随着地下工程不断向深部发展，施工过程中常常会出现高应力、极软岩体、断层破碎带等复杂地质条件。约束混凝土拱承载力的准确计算是支护设计的关键。目前，约束混凝土拱的承载力理论值是根据基础构件的轴压承载力反推导的，忽略了围岩对拱的弯矩影响。没有考虑拱节点和管片之间刚度不一致的结构特点。为了获得准确的计算结果，建立了任意截面数、不等刚度拱的理论计算模型。通过足尺室内试验和数值试验，分析了约束混凝土拱的变形和破坏特征。结果表明，拱顶位置、底部位置和腰部位置是拱的关键破坏位置。理论计算结果与极限承载力室内试验结果的差异率在5%以内，验证了理论计算模型的合理性和正确性。在上述研究的基础上，提出了约束混凝土拱的支护设计方法。现场约束混凝土拱支护参数以我国典型深部高应力矿井——梁家煤矿为工程背景进行设计。巷道围岩控制稳定。