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- overlaying rock failure 覆岩破坏
- Rock failure mode during drilling using ballas bit is similar ro shearing with high RPM andlow WOB. 由于巴拉斯钻头是剪切破岩，并且有高转速、低钻压的工作特性，笔者用它进行纠斜和防斜。
- The research results, taken as criterion of prediction of rock failure, is of important instru... 结论作为预警岩体破坏的准则有重要参考价值。
- It gives clear definition and classification of soft rock, and a comprehensive study has been made on the mechanism of soft rock failure. 首先明确了软岩的定义及分类，对影响软岩隧道稳定因素，软岩隧道失稳的力学机理和变形力学机制作了较为全面的研究。
- Under the different loading considerations and constraint conditions, rock failure happens with one type (tension or shear) or two types concurrence. 由于具体的承载条件和约束条件不同,岩体破坏时,可能是以某一种(拉或剪)形式破坏,也可能以两种破坏形式并存发生。
- Rock Failure Process Analysis (RFPA) code is used to study the failure process of rock disks with pre-existing cracks under dynamic loading. 摘要本文利用岩石破裂过程分析系统(RFPA)研究了含有不同角度预制裂纹的岩石试样在动态载荷作用下的破坏过程。
- The stability of coal pillar of the short-wall mining was analyzed systemically by numerical simulation with the rock failure process analysis software (RFPA2D). 采用岩石破裂过程分析软件RFPA2D系统，对短壁机械化开采的煤柱稳定性进行数值计算与分析。
- Based on SOC theory and BTW model, the damage evolvement and crack propagation rate are studied on instability and failure of rock. This presents a new approach to research the mesoscope evolvement law of rock failure. 基于自组织临界性理论及沙堆元胞自动机模型,对岩石失稳破坏过程中的损伤演化、裂纹扩展规律进行了探讨,从新的角度研究了岩石失稳破坏的细观演化规律。
- Through compaction hardness and analog shear rock failure test to drilling core, the paper discusses the possibility of discriminating downhole rock type by using rock acoustic emission frequency. 通过对钻井取心岩样压入硬度及模拟剪切的破岩试验,探寻利用岩石的声发射频率来判别井下岩石类型的可能性。
- By using a rock failure process analysis code, RFPA(superscript 2D), the influence of heterogeneity on crack propagation modes in rock sample containing existing flaw is numerically studied. 摘要运用岩石破裂过程分析RFPA(上标2D)系统，通过对岩石试样中预置的倾斜裂纹扩展过程的数值模拟，研究了材料非均匀性对岩石介质中裂纹扩展模式的影响。
- He tried to put a bold face on his failure. 他对自己的失败装出一副满不在乎的样子。
- The cake we made was somewhat of a failure. 我们做的蛋糕不大成功。
- Keywords mining settlement;rheo-mechanics principle;overlaying rock's movement;dynamic estimation; 开采沉陷;流变力学模型;覆岩移动;动态预计;
- The rock was honeycombed with passages. 岩石上有许多蜂窝状的小孔。
- Many young rock hounds grow up to be geologists. 许许多多爱好收集岩石的少年，长大后成了地质学家。
- experimental study of rock failure 岩石破坏实验
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- He was bewailing his failure in the examination. 他为考试不及格而悲伤。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- She was constantly spurred on by a fear of failure. 对失败的恐惧不断地激励着她。
