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本文以云南下关黄草坝的水压致裂应力测量结果为例,讨论了地形起伏对云南区应力测值的影响。结果表明,地形起伏对应力测值的绝对影响随深度的增加衰减缓慢,相对影响急剧减小。100米以内深度的应力测量,地形影响可能给测值带来10%以上的误差。云南区的水压致裂应力测量深达500米,是可以排除掉地形起伏的影响的。
In this paper, the hydraulic fracturing stress of Huangcaoba in Xiaguan of Yunnan Province is taken as an example to discuss the influence of relief on the stress measurement in Yunnan Province. The results show that the absolute influence of the undulation on the stress measurement declines slowly with the increase of depth, and the relative influence decreases sharply. Stress measurements up to a depth of 100 meters may have caused more than 10% error in the measured values due to topographic effects. The hydraulic fracturing stress measurement in Yunnan reaches a depth of 500 meters, which can eliminate the impact of topographic fluctuations.