| 1. | Principal stress direction
枝力方向 |
| 2. | The rock foundation bent under the horizontal compressive stress . it is called fold . the regional or local stress direction can be analyzed according to the fold structure
岩层受到水平挤压应力，发生弯曲称作褶皱。通常依据褶皱构造可分析区域或局部应力方向。 |
| 3. | ( 6 ) the principal stress direction arised deflexion obviously after excavation , the maximum principal stress paralled to opening , minimum principal stress vertical to sidewall or vault
( 6 )数值模拟研究表明，隧道开挖后，主应力方向发生明显偏转，最大主应力与开挖临空面平行，最小主应力近于垂直。 |
| 4. | In the research of earthquake forecast , continuous observation on the stress changes and the changes of stress direction should be sufficiently regarded in a danger region happening structural earthquakes
在地震预测研究中，既要重视对地震危险区块内的应力大小变化的实时观测，亦要重视对地震危险区块内应力方向变化的实时观测。 |
| 5. | Former true triaxial test research have been lack of the completely study on soil anisotropic deformation characteristic on condition that load in each of the tree principal stress direction because of their different research purpose
由于研究目的不同，以往真三轴试验研究中缺乏针对三主应力单向加荷时的土体各向异性变形特性较全面的研究。 |
| 6. | The pre - seismic and post - seismic stress direction can be statistically determined by a large collection of foreshock and aftershock focal mechanism data while the stress drop can be determined through the source fracture inversion from seismic wave data or crust deformation data
地震前后的应力方向可根据大量前震和余震震源机制统计给出；地震应力降可通过地震波或地壳形变资料的震源破裂反演研究得到。 |
| 7. | The technique which predicting in - situ stress direction for wells using dsa and palaeomagnetic orientation has been applied in wide - range - - - daqing , jilin , shengli , anhui , henan , erlian , changqing , talimu and qinghai oil fields and so on . the results of application are very good
将差应变分析与古地磁岩心定向技术在国内进行了进一步的应用和推广，分别在大庆、吉林、胜利、安徽、河南、二连、长庆、塔里木及青海等多个油田进行了现场应用，应用效果较好。 |
| 8. | Secondly , true taixial test by load in three different principal stress direction for study on soil anisotropic deformation characteristic are processed . lateral deformation relative to load direction , lateral deformation relative to lateral direction and the stess - strain relationship in load direction are analyzed , and soil anisotropic deformation characteristic on the three aspects of elastic ratio , poisson " s ratio and the property of compliment matrix are completely analyzed too
其次，为揭示土体各向异性变形特性，有针对性进行了三主应力分别单向加荷的真三轴试验研究，分析相对于加荷向的侧向变形、互为侧向的侧向变形、不同主应力加荷向的应力应变关系各向异性性状。 |
| 9. | The direction of migration was in east and northeast . ( 3 ) this paper introduced the balanced section into the early reservoir description in the sidaogou structure for the first time , and gave a new viewpoint that the sidaogou structure was a fault - bend fold formed by two step thrust fault . the structural stress direction came from the northeast of the hami depression
首次将平衡剖面技术引入了四道沟构造早期油藏描述的构造研究之中，并首次提出四道沟构造是?至少由两个阶梯状断层组成的后倾双重构造叠加的断层转折褶皱，构造应力方向应大致源于北东方向。 |
| 10. | Based on the characteristics of the quaternary tectonic activities of babaoshan - huangzhuang - gaoliying fault and the regional principal compressional stress direction and regional tectonic activities derived from the recent cross - fault displacement observation data in the capital area , we have analyzed the relationship between the fault movements at 7 cross - fault observation sites on the babaoshan - huangzhuang - gaoliying fault and the seismicity , conclude that the capital and adjacent area is soon to enter upon the next active period of earthquakes
摘要根据八宝山黄庄高丽营断裂第四纪地质构造活动特徵和利用首都圈地区跨断层位移最新的观测资料求得的北京地区区域主压应力方向和区域构造活动特徵，分析了八宝山黄庄高丽营断裂上7处跨断层位移测点的断层活动与地震活动的关系，得出了首都圈及邻近地区即将进入下一个地震活跃期的结论。 |
