【摘要】 基于地下水封洞库工程区的地质勘查成果,构建了工程区三维地应力场有限元模型,利用工程区实测地应力结果作为约束条件,以保证模拟结果的可靠性。模拟结果表明:(1)工程区压应力集中部位与NE向断裂的走向一致,工程区北部边界断裂F1对工程区的应力分布有阻碍限制作用;(2)场地中央断裂F9的应力已达到发生岩爆的条件;远离断裂,应力逐渐减小;(3)根据应力强度场和第三主应力场的特征并结合判断结构面稳定性的判别式分析,工程区内发育的产状为92°∠78°和190°∠65°的结构面的稳定性较差,在洞库开挖过程中应给予足够的重视。更多还原

【Abstract】 Based on the geological survey achievements in a underground water-sealed storage cavern engineering area in Yantai,Shandong Province,the three-dimensional tectonic stress field finite element model of engineering area was established. The stress results measured in engineering area were used to constrain the simulation. Results have show that the locations of compressive stress concentration in the engineering area are consistent with the strike of NE-trending faults,and the stress values near F9 have reached the condition of rock burst. The northwestern strike F1 fault has restrictive effect on stress distribution in engineering area. Comprehensive analysis of the simulated stress intensity and features of the third principal stress and the discriminant using to judge the stability of structural planes indicate that the stability of two groups of structural planes with the occurrence of 92° ∠78° and190°∠65° is poor. Adequate attention should be paid to the excavation of caverns.更多还原