periblastula是什么意思

用法例句

Relations between changes of constitution stress field due to mining process and earth surface cracks;

模型半定量地给出了地表开裂的力学原因,并对地表裂缝的进一步发展作了预测。

The research on surface cracks in Weibei mining subsidence area and analysis of anti-deformation residence design;

渭北采动沉陷区地表裂缝规律及村镇抗变形民宅设计分析

In order to control the surface crack damage of huge thick collapsible loess caused by mining effectively,the distribution rule of stress-strain in top interface of the base rock and the relation of which and the surface crack were obtained using the probability integral method.

为了有效地进行采动巨厚湿陷性黄土地表裂缝损害的控制和治理,在对西部几个矿区开采地表裂缝破坏调查的基础上,应用概率积分法计算基岩顶界面的应力应变分布规律,分析其与地表裂缝的关系,研究开采引起黄土层地表裂缝产生的机理。

Aiming at the surface crack that happened in tunnel construction it analyses its reasons,and puts forward the corresponding management steps to supply reference to the related people.

结合贺家庄隧道施工具体情况,阐述了弧形导坑预留核心土七步流水作业法开挖黄土隧道施工工艺,针对隧道施工中出现的地表裂缝进行了原因分析,并提出了相应的处理措施以供有关人员参考。