【摘要】 利用唐山地区丰富的震源机制解资料反演构造应力场 ,并结合构造物理研究手段 ,对唐山地震震源区现代构造应力场的 3个主应力绝对量值进行了估算 ,给出了地壳介质参数取理论平均值的情况下 ,唐山地震震源区构造应力场 3个主应力量值随深度的变化趋势 .研究分析了摩擦系数μc、孔隙压力 P0 和应力形因子Φ等参数与应力值的关系 ,发现最大主应力σ1的垂向增长率与摩擦系数 μc成正比 ,与孔隙压力 P0 和应力形因子 Φ成反比 ;而最小应力值σ3 的垂向增长率与孔隙压力 P0 成正比 ,与摩擦系数μc和应力形因子Φ成反比 .本文对应用震源机制解资料反演完整的应力张量进行了一次有意义的尝试更多还原

【Abstract】 Based on the abundant data of focal mechanism solution in Tangshan region, we playback its tectonic stress field; combined with tectonophysical method, we estimate the absolute values of three principal stresses in the source of Tangshan earthquake, as well as their vertical variations under the average values of crustal dielectric parameters. We also study the relations of ctustal stress with friction μ c, pore pressure P 0 and streess factor Φ , which are: the vertical growth rate of the maximal principal stress σ 1 is direct ratio fiction, and inverse ratio to pore pressure P 0 and to stress factor Φ; while the vertical growth rate of the minimal principal stress σ 3 is direct ratio to pore pressure P 0, inverse ratio to friction μ c and to stress factor Φ . This paper is a significant probe to play back the complete stress tensor using the data of focal mechanism solution.更多还原