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煤系岩层往往具有明显的流变性能。本文根据线粘弹理论,对符合H-K模型的流变岩体,利用弹性-粘弹比拟,推导出圆孔直径两端的径向相对位移与地应力、岩体变形性质参数之间的关系式,从而为利用孔边位移量测结果反算地应力及变形性质参数提供了可能。由于流变岩体的位移在钻孔形成后还会随时间而改变。因此,位移量测不需要经过应力解除步骤。在围岩强度允许的条件下,流变岩体的位移量测也可以在圆形巷道中进行。
Coal measures tend to have significant rheological properties. According to the theory of linear viscoelasticity, the rheological rock mass conforming to HK model is derived from the relation between the radial relative displacements at both ends of the circular hole diameter and the parameters of the in-situ stress and rock mass deformation by using the elastic-viscoelastic simulation. Therefore, it is possible to calculate the parameters of in-situ stress and deformation by using the displacement measurement results of holes. As the displacement of rheological rock body after drilling is formed will change over time. Therefore, the displacement measurement does not need to go through the stress relief step. Under the condition of rock strength, displacement measurement of rheological rock mass can also be carried out in circular tunnel.