地下洞室复杂围岩弹塑性解析解初探

Analytic Theory of Elastoplasticity for Underground openings Surrounded by Complex Rock Masses

考虑到地下洞室复杂围岩各向异性的破坏条件,采用弹塑性分析方法,导出了各向异性洞室围岩山岩压力公式和有压隧洞覆盖层厚度公式.通过解析理论分析,定量地研究了山岩压力随层理作用而增大,覆盖层承载能力随层理作用而降低的变化规律.

A stability analysis of underground openings surrounded by anisotropic rock masses is given.The failure criterion of anisotropic rock is employed.By means of elastoplastic analysis,two pressure formulas of rock surrounding openings and a thickness formula of overburden layers on pressure tunnels are obtained.It is shown that the rock pressure is increased and the bearing capacity of overburden layers is decreased by rock anisotropy.