枣泉煤矿地应力测试及其分布特征分析

Geo-stress Test and Distribution Characteristic of Zaoquan Colliery

介绍了水压致裂法进行地应力测试的原理,并应用此法对枣泉煤矿东、西翼采区进行了8个测站的地应力现场实测。结果表明:该区地应力以水平应力为主,实测最大水平主应力为8.6～13.37MPa,最大水平主应力方向大致为北偏西方向,没有大的偏斜,一致性较好。东翼采区最大水平主应力方向与试验巷道轴向夹角在50～68°之间,西翼采区最大水平主应力方向与试验巷道轴向夹角在4～70°之间,且随巷道向里夹角呈增大趋势;从应力的绝对值看,该区地应力场属中等偏低地应力区。最大与最小水平主应力值总体上有随巷道向里增大的趋势。

This paper introduced principle of geo-stress test by hydrofracturing This method was applied at 8 test points in east and west mining area of Zaoquan Colliery Test results were as follows Horizontal stress was major in this area Maximum horizontal principal stress was 8.6～13.37MPa,its direction was north-to-west Angle between maximum principal stress direction and roadway axial direction was 50～68° in east mining area,and that was 4～70° in west mining area and increased with roadway inward Geo-stress value of this area was medium low Maximum and minimum principal stress totally increased with roadway inward