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- overburden rock failure 覆岩破坏
- Therefore, in the process of load transfer within the unconsolidated confined aquifer, the key strata of overburden rock are prone to have a compound breakage when the load on the upper interface of bedrock is great and the bedrock is very thin. 在松散承压含水层的载荷传递作用下，作用在基岩顶界面的载荷较大，当基岩厚度较薄时，采场覆岩关键层易产生复合破断。
- 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。
- Mechanics of Overburden Rock Mass in Mining 采动岩体力学
- 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。
- Essential elements, i.e. source rocks, reservoir rocks, seal rocks, overburden rocks, and the related geological processes are involved in the petroleum system. 在油气探勘作业上，整合地质、地物及地化资料，进行石油系统的成因分析，包括油气生对移聚和封存，可以评估其油气潜能，做为矿区筛选及排序的重要依据。
- 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。
- Numerical simulation of failure process of overburden rock strata caused by mining excavation 采动影响下覆岩垮落过程的数值模拟
- 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。
- 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。
- 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。
- The Experimental Research of Numerical Simulation for the Depth Mining's Effect on the Law of Movement and Failure of Overburden Rock Seam 采动对岩层移动破坏规律的数值模拟试验研究
- RESEARCH ON THE FRACTAL EFFECTS OF CRACK NETWORK IN OVERBURDEN ROCK STRATUM 采动岩体分形裂隙网络研究
- 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。
