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岩饼是工程区高地应力的标志之一,其形状与主应力的大小和方向直接相关,岩饼出现时刻通常的应力解除法不能再用于原地应力测量。根据国内外众多学者多年来对岩饼现象的研究成果,提出一种根据岩饼的几何形态测量初步计算三维地应力的方法。经实践验证,与同一工程区其他地应力测量方法的结果相比,岩饼几何形态测量方法确定出三维地应力的方向相差不大,倾角差值在10°以内,方位角之差小于20°,主应力大小满足岩饼出现的条件,具有简便实用的优点。
Rock cake is one of the symbols of the highland stress in the engineering area. The shape of the rock cake is directly related to the size and direction of the principal stress. The normal stress relief method at the moment of the rock cake can no longer be used for in-situ stress measurement. According to the research results of rock cake phenomenon by many scholars at home and abroad for many years, a method of preliminary calculation of three-dimensional ground stress based on the measurement of the rock cake geometry is proposed. Compared with the results of other methods of geostress measurement in the same project area, the geomembrane geometrical measurement method has determined that there is little difference in the direction of three-dimensional geostress, the difference of dip angle is within 10 ° and the difference of azimuth angle is less than 20 ° , The main stress size to meet the rock cake conditions, with simple and practical advantages.