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本文提出了一种在矿山地区确定初始地应力的新方法。根据本文提出的方法,只要在三个相互交义的圆形巷道中量出过洞周特定点的直径两端的径向相对位移值,即可计算这些量测巷道所在地段地层的初始地应力。文中给出了算例,并对算例作了验证。由于洞周相对位移不难量测,且有关的理论计算公式并不复杂,这一方法具有简单易行的特点,与其它方法相比较将有经济价值。本文提出的方法也可为勾划矿山地区初始地应力的分布规模提供有价值的资料,并可用于确定其它地下工程围岩中的初始地应力。
This paper proposes a new method to determine the initial ground stress in the mine area. According to the method proposed in this paper, as long as the radial relative displacement values at both ends of the diameter of the specific point of the hole are measured in three mutually equivalent circular roadways, the initial ground stress of the strata in the location of the measured roadway can be calculated. The examples are given in the paper and verified by examples. Because the relative displacement of the hole is not difficult to measure, and the relevant theoretical calculation formula is not complicated, this method is simple and easy to use and will have economic value compared with other methods. The method proposed in this paper can also provide valuable data for mapping the initial geostress distribution scale in the mine area, and can be used to determine the initial ground stress in the surrounding rock of other underground projects.