高地应力地区河谷应力场特征

利用数值模拟以及地应力实测资料，研究了高地应力区河谷应力场的分布特征，发现对于无卸荷带的均质弹性边坡，从坡表到坡内可以划分为应力降低区（ ）、应力平稳区（ ）2个区；对于存在卸荷带的边坡，从坡表到坡内可以划分为3个区：应力降低区（ ）、应力升高区（ ）、应力平稳区（ ）。卸荷带的存在是最大主应力从坡表至坡内出现3个带的本质原因。高地应力区边坡由于构造应力场的存在，使得边坡应力集中的水平明显提高，集中的范围明显变大，边坡常常存在较宽卸荷带，因此，高地应力地区高陡边坡的应力场也可以大致划分为应力降低区、应力升高区、应力平稳区3个带。但一些高地应力地区边坡内部发育深部卸荷裂缝，其应力集中区向坡体内部转移，应力降低区内的应力出现波动变化，深部裂缝存在部位应力明显降低

Stresses field characteristics Of a valley slope in high geo-stress area

The paper does some researches on stress field distribution characteristics of the valley in high geostress areas by using numerical simulation and in-situ stress measured data.The result shows that: for the maximum principal stress,the homogeneous elastic slope without unloading zone could be classified into two zones as the stress-releasing zone() and the stress-stable zone() from the slope surface to the inside,where h stands for the original buried depth of the studied point,while there are three zones ...