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针对北天山矿区地质构造复杂和地应力分布离散性大的问题,采用区域地质构造分析和现场地应力测量相结合的方法分析北天山矿区地应力分布规律。研究表明四棵树煤矿地应力场类型为σH>σh>σv,水平主应力方向位于北北东向且与区域构造应力场最大主应力方向一致。较高的区域挤压应力和巷道走向与区域主应力方向的不合理是造成矿井采准巷道矿压显现强烈的主要原因,并根据地应力分布特征和矿井开拓情况,建议后续工作面巷道轴线的最佳方位角为北北东16.3°,提高了复杂构造条件下的矿压控制的科学性和可靠性。
In view of the complicated geological structure and large discrete stress distribution in the North Tianshan Mining Area, the distribution of the earth stress in the North Tianshan Mining Area is analyzed by the combination of regional geological structure analysis and on-site stress measurement. The study shows that the stress field type of Sushu Shu coal mine is σH> σh> σv, the horizontal principal stress direction is located in the north-north-east direction and coincides with the direction of the maximum principal stress of regional tectonic stress field. The reason of the high regional compressive stress and the unreasonable direction of the direction of the roadway and the direction of the main stress in the area is the main reason that causes the underground mine pressure to appear strongly. According to the distribution characteristics of the earth’s stress and the condition of mine exploitation, The best azimuth is 16.3 ° north and north east, which improves the scientific and reliability of underground pressure control under complex structural conditions.