To investigate the zonal disintegration form of the surrounding rock in deep tunnels, model tests were performed in the simulation set-up of fracture mechanism and support technology of surrounding rock in deep tunnel. The test results illustrate that the first fracture of the surrounding rock occurred at the intersection of the tunnel floor and the side wall. After more serious destruction, the side wall and the vault were destroyed. Although the fracture width of each surrounding rock mass was distinct, they were relatively uniform with a nearly continuous fracture form. The width of the split bodies of the model tunnels (i.e., the annular zonal disintegration area) developed with an increasing load. It was observed from the fitting curves of the data that all radial strain values of the surrounding rock were more symmetric with a smooth fitting curve, and the maximum value occurred near the tunnel wall before reducing instantly. The circumferential strain values were dispersed and the data were inconsistent with the fitting curve, which caused some data to be unreliable. The phenomenon of zonal disintegration was primarily caused by radial tension strain of the surrounding rock. This phenomenon would not extend indefinitely as the rupture range would be limited to a certain extent, because the maximum radial tension strain of the surrounding rock was less than the limiting value.

为了研究深埋隧道围岩的带状崩解形式，在深埋隧道围岩的破裂机理和支护技术的模拟设置中进行了模型试验。测试结果表明，围岩的第一次破裂发生在隧道底板与侧壁的相交处。经过更严重的破坏后，侧壁和金库被破坏了。尽管每个围岩的裂隙宽度是不同的，但它们是相对均匀的，具有几乎连续的裂隙形式。模型隧道的分裂体的宽度（即环形带状崩解区域）随着载荷的增加而发展。从数据的拟合曲线可以看出，围岩的所有径向应变值均与光滑的拟合曲线更加对称，最大值出现在隧道壁附近，然后立即减小。圆周应变值分散并且数据与拟合曲线不一致，这导致一些数据不可靠。带状崩解现象主要是由于围岩的径向张力应变引起的。由于围岩的最大径向张力应变小于极限值，因此破裂范围将受到一定程度的限制，这种现象不会无限期地扩展。圆周应变值分散并且数据与拟合曲线不一致，这导致一些数据不可靠。带状崩解现象主要是由于围岩的径向张力应变引起的。由于围岩的最大径向张力应变小于极限值，因此破裂范围将受到一定程度的限制，这种现象不会无限期地扩展。圆周应变值分散并且数据与拟合曲线不一致，这导致一些数据不可靠。带状崩解现象主要是由于围岩的径向张力应变引起的。由于围岩的最大径向张力应变小于极限值，因此破裂范围将受到一定程度的限制，这种现象不会无限期地扩展。