岩体的加、卸载状态与能量的分配关系

岩体是流变体，在高地应力的长时间作用下其内部非均匀应力随着时间自我松弛，逐渐趋向于静水压力状态。在这样的状态下，虽然其体积仍维持弹性，但丧失了进一步抵抗剪切变形的能力，处于流动的状态，其能量储存具有体积的特征。采用平面压缩模型，研究岩石在不同应力水平长期作用下的变形性状及能量分配关系，给出在快速卸荷条件下发生自持续动力断裂破坏条件，以期揭示深部岩体初始地应力水平（能量在体变及形变上的分配关系）对卸荷条件下岩体运动过程中表现的惯性、黏性及弹塑性变形的影响规律，为建立深部岩体加卸荷本构关系打下基础。

Study of loading-unloading states and energy distribution relationship for rock mass

Rock mass is a rheological material; under the action of high geostress for a long time, its inner unequal stress could relax as time itself; thus finally tends to be hydrostatic stress state. In such state, although the volume remains elastic, it lost the ability to resist shear deformation; its energy mostly stored in volume deformation. This paper uses a plane compression model to investigate the deformation behavior and energy distribution relationship for rock mass under different stress levels long-term effects; and then discusses the brittle fracture failure for strong unloading, so as to reveal the influence law that initial geostress value(energy distribution relationship) acts on rock mass deformation(inertia, viscosity and elasticplastic deformation). The research results build a basis to establish the loading-unloading constitutive model for deep rock mass.