二十年岩体应力现场实测研究

本文介绍了几个现场应力量测实例,并将其划分为三种类型:低强度岩体中应力;高强度岩体中应力;高应力地区岩体中应力。被测岩体包括各种各样的沉积岩、火成岩和变质岩,它们的杨氏模量介于1—105 GPa。用于应力解除的最深钻孔为90.7m。根据上述实测结果及简单分析计算,归纳出初始应力在地壳浅部分布的一般规律,论述了初始应力与岩石杨氏模量的关系及其对岩体工程的影响。

Study of Stress Measurement In-situ in the Last Two Decades

Various typical results are introduced of in-situ stress measurements by overcoming tests during last two decades. The stress cases could be divided into three types: in-situ stress in lower strength rock; in-situ stress in higher strength rocks; in-situ stress in high stress region. The involved rock masses were variety of Sedimentary rock, Igneous rock, and Metamorphic rock with yang’s modulus from 1 to 105GPa. The deepest borehole used for stress release was 90.7 m. Some general laws of initial stress in the shallow earth crust were drawn from the above results. The relationship between initial stress and yang’s modulus of rocks and the influence of initial stresses on rock engineering are discussed.