附加的张性应力相当于减小围压。
Such additional stress may be explained as caused by the decrease in confining pressure.
由此研究模型中相关系数与围压的关系。
Corresponding relationships of parameters in the model are also presented.
岩石全部断裂能随着围压的增加亦成正线性增加。
The total fracture energy of rock specimens also increases linearly as confining pressure increases.
岩石残余强度对围压的敏感性显著高于峰值强度。
The sensitivity of residual strength on the confining pressure is higher than that of peak strength.
通过理论推导和试验分析研究岩石扩容与围压的关系。
The relation function of rock dilatancy and confining pressure is investigated by theoretical and experimental methods.
试验结果表明，围压的增大明显增强了冻土的塑性性能；
The. test results showed. the plasticity of frozen soil is increased obviously with increasing confining pressure.
研究结果表明，岩样的峰值应力都随着围压的增大而增大。
The results show that peak stress of rock specimens increases with confining pressure.
但固结应力比与有效围压应力对阻尼比之影响则较不明显。
The influence of consolidation stress ratio on damping ratio is not distinct.
引入断裂韧度和围压的关系来反映锚杆的对围岩的加固作用。
Relationship between fracture toughness and confining pressure was introduced to describe the anchoring effect.
在较低围压条件下，岩石的压缩强度同围压系数具有线性关系。
On condition of low confining pressures, the simulating compression strength keeps linear relation with confining pressure's coefficient.
对于地下洞室边墙来说，锚杆的存在相当于增加了一部分围压。
The existence of rockbolt increased the confining pressure for the sidewall of underground opens.
天然地震应力降低于室内粘滑应力降是由围压介质刚度引起的。
That the stress drops of natural earthquakes are not as great as that of laboratory experiment is caused by confining, stiffness.
并由三轴试验得出各力学性质指标与龄期和围压的近似定量关系。
Approximate quantitative relations between mechanical index and age and confining pressure are obtained by triaxial compression test.
分析结果表明：盐岩是一种软岩，围压对盐岩力学性质影响较大；
The results indicate that rock salt is a typical soft rock, The mechanical characteristics of rock salt is strongly dependent on confined pressure.
煤样的峰值渗流速度随围压的增加而减小，呈现较明显的线性关系。
The seepage velocity in peak stress decreases with the increase of confining pressure, and indicates obvious linear relationship.
无围压射孔技术就是研究在高负压甚至无围压条件下实现射孔完井。
To solve this problem we developed a high negative pressure and confining pressure-free perforating process.
该结论可为级配碎石材料室内动三轴试验施加偏压和围压提供借鉴。
This conclusion can provide references for the grading macadam dynamic triaxial experiment partial pressure and enclosed pressure in the laboratory.
地震动态应力使围压产生低值波动，一方面使围压减小、摩擦力减小；
The dynamical stress produced by superposition or interference of reflected stress wave makes confining pressure reduce and change at low values.
至更高围压后，抗压强度与围压的应力差、抗剪强度将趋于某一常数。
Under the higher confining pressure, the shearing strength and the differential stress between the compression strength and confining pressure tend to be the constant.
根据储层中上覆岩石围压变化，通过室内试验表述了其对渗透率伤害。
Based on the change of stress from upside rock in the reservoir, the damage to permeability is illustrated by the lab experiment.
研究了围压、端面约束、试件高度及界面特性对剪切带网络形成的影响。
The influences of confining pressure, end constraint, height of specimen and interface on networks of shear bands are investigated numerically.
即围压的增加可以抑制冻土的膨胀软化效应，也可以诱导膨胀软化现象。
Namely, the increase of confining pressure can suppress as well as induce the effect of dilatancy softening of dilatancy softening of frozen soil.
低围压时，岩石试件内材料并未趋于均匀化，非均质性显著，强度尺寸效应明显；
At low confining pressures, the inhomogeneity of rock materials results in obvious strength-size effect.
该模型能反映岩石的软化特性及破坏的全过程，也能反映岩石强度受围压的影响。
The model can reflect the softening characteristics and whole process of rock's deformation and failure, and the influences of surrounding stress on rock's strength.
此外，岩石材料的剪切带分叉发生在峰值应力之后，随围压增加而逐步远离峰值点。
Furthermore, the localization shear band bifurcation takes place at the point in the strain softening area, and the point would be far from the peak point with the increment of lateral pressure.
通过极限抗拉强度试验和围压作用下的拉伸试验，研究了柔性混凝土的抗拉破坏特性。
Based on the ultimate tensile strength test and extension test under confining pressure, the characteristics of flexible concrete are studied.
原状膨胀土在吸力和净围压较低时的剪胀和软化特性主要是由于结构损伤的演化引起。
The dilation and softening characteristics of natural expansive soil while shearing under low net mean stress and suction are mainly caused by the evolution of damage structure.
并根据大量的实验数据，拟合得到含瓦斯煤的渗透率随围压和孔隙压力变化的经验方程。
The new equations for gas permeability of the coal samples are formulated by the numerical simulations of experimental data.
并根据大量的实验数据，拟合得到含瓦斯煤的渗透率随围压和孔隙压力变化的经验方程。
The new equations for gas permeability of the coal samples are formulated by the numerical simulations of experimental data.
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