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任何一种结晶岩体或某些沉积岩体,在其形成之后都遭受了若干次构造运动,每次构造运动都是在一定温度场和应力场下进行的,因此留下了遗迹。是否可以根据这些遗迹来推求当时的应力场与温度场呢?本文讨论了在一定条件下根据岩石共轭节理的夹角来推求共轭节理形成时温度场及地应力场的具体方法。根据岩石共轭节理的夹角,可以求出在共轭节理形成时的温度场下岩石的内摩擦角φ值,从而反推出共轭节理形成时的温度。在这种温度下,又可由试验求出岩石的内聚力c值,最后根据两种岩石的φ、c值,就可求出当时的最大及最小主应力值,进而求出应力场。
Any kind of crystalline rock or some sedimentary rock body suffered several tectonic movements after its formation. Each time the tectonic movement was carried out under a certain temperature field and stress field, and thus left a relic. Is it possible to deduce the stress field and temperature field at the time based on these relics? This paper discusses the specific methods of deducing the temperature field and the geostress field of conjugate joints under certain conditions based on the angle of the conjugate rock joints. According to the angle of the conjugate rock joint, the internal friction angle φ of the rock under the temperature field during the formation of the conjugate joint can be obtained, and the temperature when the conjugate joint is formed can be deduced. At this temperature, the c value of the cohesive force of the rock can be obtained from the test. Finally, based on the φ and c values of the two rocks, the maximum and minimum principal stress values at that time can be obtained and the stress field can be obtained.