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本文先研究了矿井中岩体(或矿体)和混凝土胶结充填试件受力作用下地电阻率(ρ_s)年变化的方向性.结果表明,平行压力方向的地电阻率年变化幅度最小,垂直压力方向则最大,与压力方向成45°夹角的则介于二者之间.根据此结果,我们统计了全国98个地电台的地电阻率资料,并将中国大陆按应力场方向划分为三大应力场区:1.中国西部应力场区,其方向为近南北向;2.中国北部应力场区,其方向为近北东向;3.中国东南部应力场区,其方向为近东西向.因此,可以利用同点三向等极距地电阻率年变化法来测量当时当地不同方向的应力场作用.
In this paper, the directivity of annual variation of resistivity (ρ_s) of rock mass (or ore body) and concrete cemented-filled specimen in mine is studied first.The results show that the resistivity in the direction of parallel pressure has the smallest annual variation, The pressure direction is the largest and the pressure direction is at an angle of 45 ° between the two.According to the result, we have calculated the earth resistivity data of 98 ground stations nationwide and divided the field of mainland China into Three major stress fields: 1. China’s western stress field, its direction is nearly north-south; 2. North China stress field, the direction of nearly NE; 3. The stress field in southeastern China, the direction of the near Therefore, we can use the same point three-polar isoelectric distance resistivity annual change method to measure the different local stress field at that time.