The pressure was then suddenly released in order to find out the critical condition of failure under the combined effect of confining pressure and pore pressure.
在轴对称的实验装置上，对上下施加侧压的中心开孔的含瓦斯煤饼，将孔内压力突然降至大气压，求得煤样在侧压和瓦斯压力联合作用下的临界破坏条件。
Granule failure of calcareous sand is very special at low stress level. The effect of confining pressure on granule farlure is analyzed and its deformation mechanism discussed.
针对低应力水平下钙质砂的颗粒破碎现象具有特殊性，分析了围压对钙质土颗粒破碎的影响，揭示其变形过程的力学机制；
Results show that rock damaged under cyclical impact will obviously bring confining pressure effect, and the existence of confining pressure also increased the ability of rock against impact damage.
结果表明，岩石循环冲击损伤具有明显的围压效应，围压的存在提高了岩石抗冲击破坏的能力。
Namely, the increase of confining pressure can suppress as well as induce the effect of dilatancy softening of dilatancy softening of frozen soil.
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。
Through analyzing the normalized strength, the effect of reinforcement under different confining pressure is studied. The macro-behaviour of reinforced soil is analyzed.
通过归一化强度分析，研究了不同围压下加筋的效果，分析了加筋土强度提高的宏观表现。
Moreover, for sandstone and granite with a single fracture, there is obvious hysteresis effect for the restitution of permeability in the process of unloading for confining pressure.
在围压下降过程中，砂岩和单裂隙试件渗透率的恢复均存在明显的应力滞后效应。
The experimental results indicate that unloading confining pressure has important effect on the intensity of rock.
研究结果表明：卸围压对岩石的强度影响很大。
The effect of unloading confining pressure on cohesion is more obvious than that of angle of internal friction.
卸荷对黏聚力的影响比对内摩擦角的影响大。
In this paper, the effect of different confining pressure and rock is studied. (2) Rock fracture process induced by double cutters and three cutters simultaneously is studied.
双刀头、三刀头同时作用下以及三刀头顺次压入岩体破碎过程数值模拟。
In this paper, the effect of different confining pressure and rock is studied. (2) Rock fracture process induced by double cutters and three cutters simultaneously is studied.
双刀头、三刀头同时作用下以及三刀头顺次压入岩体破碎过程数值模拟。
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