露天矿边坡岩体力的应力集中

在露天边坡的开挖过程中，由于临空面的卸载回弹，天然岩体内的初始应力于坡脚附近形成一个明显的应力集中带，从而使得坡脚成为边坡失稳的主要部位。有限元法分析结果表明，边坡岩体的应力集中，受到初始侧向水平应力、边坡高度、坡角和坡底宽的影响，其中尤以侧向水平应力的影响最为关键。

Stress Concentration in Slope Rockmass at an Open Pit

During the excavation process of an open pit slope, due to the resilience of open space after unloading, an obvious stress concentration zone is formed from the primary stress in the undisturbed rockmass near the slope foot . Therefore, slope foot becomes the major contributor to slope stability. Finite elementary analysis shows that stress concentration in slope rockmass is affected by primary lateral horizontal stress, slope height , slope angle and width of slope bottom, among which lateral horizontal stress is the most important factor.