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为了研究淮南煤田的地应力分布特征和垂向变化规律,通过对淮南煤田顾桥煤矿的地应力测试和分析,发现顾桥煤矿最大主应力方向在NE56.8°~76.3°之间,平均水平地应力方向为NE67.17°~SW67.17°.通过对矿区地应力随埋深的变化规律研究,结果表明:最大水平主应力SH、最小水平主应力Sh和铅直主应力Sv随着深度的增加而呈线性增加.此外,研究发现:在埋深600 m以浅,最小主应力大于垂向应力;在埋深600 m以深,最小主应力小于垂向应力;在埋深1 000 m以浅,最大主应力大于垂直应力;在埋深1 000 m以深,最大主应力小于垂向应力.依据地应力与埋深的关系,可以把1 000 m深度作为划分深浅煤层的一种重要方法.
In order to study the distribution characteristics and vertical variation of stress in Huainan coalfield, the ground stress of Guqiao coal mine in Huainan coalfield is tested and analyzed. It is found that the direction of maximum principal stress in Guqiao coal mine is between NE56.8 ° and 76.3 °. The average level The direction of the earth stress is NE67.17 ° ~ SW67.17 °. By studying the variation law of the ground stress with the depth of the mine, the results show that the maximum horizontal principal stress SH, the minimum horizontal principal stress Sh and the vertical principal stress Sv vary with the depth In addition, the study found that: in the depth of 600 m shallow, the minimum principal stress is greater than the vertical stress; at the depth of 600 m deep, the minimum principal stress is less than the vertical stress; in the depth of 1 000 m shallow, The maximum principal stress is greater than the vertical stress, and at the depth of 1 000 m, the maximum principal stress is less than the vertical stress.According to the relationship between the ground stress and the buried depth, the depth of 1 000 m can be used as an important method to divide the deep and shallow coal seams.