摘要
为了解雅鲁藏布江断裂带附近的原地应力场状态 ,采目前先进的水压致裂方法 ,在西藏拉贡机场CK3号井中进行了 5 2 .5～ 73.6m、92 .2～ 10 5m、117.12～ 14 2 .6m、14 2 .91～ 15 3.7m、16 6 .38～ 173.7m、187.38～ 2 17.98m、2 2 7.3～2 88m、2 93.5～ 32 2m共计八个深度段的地应力测量 .运用工程地质分析原理和统计分析方法对研究区地应力场的总体变化特征以及垂直埋深、水平埋深的关系进行了分析研究 ,取得各测段处的最大、最小水平主压应力的量值以及岩石的原地抗张强度、岩石的重张压力等力学参数 .另外利用区域地质构造和三维有限元分析方法相结合的技术 ,分析确定测区附近的主应力方向 ,为雅鲁藏布江构造带的应力场研究和工程设计提供依据 .
To find out the state of the original earth stress field near the Brahmaputra rapture strip, the advance method of hydrofracturing is introduced to measure the earth stress of the No.CK3 drill at the eight different depths: 52.5～73.6 m, 92.2～105 m, 117.2～142.6 m, 142.91～153.7 m, 166.38～173.7 m, 187.38～217.98 m, 227.3～288 m, 293.5～322 m. The relationship of the collective variety characteristics of the earth stress field to the vertical buried depth and horizontal buried depth is analyzed and investigated by using the analysis principle of the engineering geology and the method of the statistical analysis. The maximum and the minimum value of the main pressure stress at each depth and the mechanics parameters of the intensity of the resistance to strain of the rock at the original place and the tensile stress leading to rupture again of the rock are acquired. In addition, the direction of the main stress near the measured area is ascertained for the foundation of the engineering design by the method combining the regional tectonics to the three dimensional finite element.
出处
《地球物理学进展》
CSCD
2003年第1期167-172,共6页
Progress in Geophysics
关键词
地应力测量
变化特征
实测数据
计算分析
measurement of the earth stress, variety characteristics, authentic data, calculation and analysis
