基于Geo Studio的尾矿坝特殊运行条件下稳定性分析

STABILITY ANALYSIS OF TAILING DAM BASED ON GEO STUDIO UNDER SPECIAL RUNNING CONDITION

汶川地震使得震区尾矿库发生不同程度破坏和溃坝事故,研究尾矿坝在特殊运行条件下稳定性尤为重要。在洪水位抬高坝体浸润线和地震的反复剪切破坏双重作用下,使得尾矿坝大面积发生液化,从而导致尾矿坝发生溃坝事故。首先,通过Seep/W模块对洪水位下尾矿坝渗流场进行分析;其次,Quake/W模块求解坝体初始应力状态;然后,Quake/W在输入汶川地震波进行地震动力响应分析;最后,运用Slope/W对坝体安全稳定性进行分析,求解出坝体潜在滑移面和最小安全系数。运用Geo Studio对坝体在特殊运行条件下进行数值分析,可掌握尾矿坝安全状况,得到的结果也符合实际情况。

Wenchuan earthquake has caused tailing dams destroyed and collapsed with different degrees of damage in the quake-stricken areas. Under such condition, it is quite important to study the stability of tailing dams under special running conditions. The flood raises saturation lines of dams while the earthquake shears and destroys dams repeatedly. As a result, tailing dams liquefy in large areas, which causes tailings dams collapsed. Firstly seepage fields of tailing dams under flood level are analyzed by the module Seep/W. Next, the module Quake/W is applied to work out the initial stress situations of dams. Then, Wenchuan earthquake wave is input in the module Quake/W to analyze dynamic reaction of the quake. Lastly, the module Slope/W is applied to analyze the safety and stability of dams to work out the latent slide interface and minimum safety factors. By applying Geo Studio to analyze the data of dams under special running conditions, information about safety situation of tailing dams can be obtained and results are reliable.