The “three shells” cooperative support technology was proposed herein according to both the large deformation of the rock surrounding large-section chambers in deep mines and the precarious stability of the support structures therein. The development range of the plastic zone in the surrounding rock was controlled by a stress shell to reduce the difficulty of controlling the surrounding rock. Additionally, the residual strength of the rock mass in the plastic zone and the self-bearing capacity of the surrounding rock were improved by a reinforced load-bearing shell. Furthermore, a passive load-bearing shell could restore the triaxial stress state of the surrounding rock on the free surface, reduce the influence of the external environment on the surrounding rock, and reinforce the surrounding rock with the strength of the shell. Reasonable layouts of large-section chambers were determined by analyzing the control effect of the stress shell on the surrounding rock under three kinds of in situ stress fields. The orthogonal test method was applied to reveal the influences of different support parameters in the reinforced load-bearing shell and passive load-bearing shell on the surrounding rock stability. The surrounding rock control effect of the “three shells” collaborative support technology was analyzed through numerical simulation and field monitoring. The results show that the maximum displacement between the roof and floor of the coal preparation chamber in the Xinjulong coal mine was approximately 48 mm, and the maximum displacement between its two sides was approximately 65 mm, indicating that the technology proposed herein could meet the long-term control requirements of the surrounding rock stability for large-section chambers in deep mines.

“三壳”协同支护技术是针对深部矿山大断面室围岩变形大和支护结构不稳定的特点提出的。围岩塑性区发育范围采用应力壳控制，降低围岩控制难度。此外，塑性区岩体的残余强度和围岩的自承载能力通过加筋承重壳得到提高。此外，被动承重壳可以恢复围岩在自由面上的三轴应力状态，减少外界环境对围岩的影响，利用壳的强度对围岩进行加固。通过分析三种地应力场下应力壳对围岩的控制作用，确定大断面室的合理布置。采用正交试验方法揭示了加筋承重壳和被动承重壳不同支护参数对围岩稳定性的影响。通过数值模拟和现场监测，分析了“三壳”协同支护技术的围岩控制效果。结果表明，新居龙煤矿选煤室顶底板最大位移约48 mm，两侧最大位移约65 mm，