摘要
采用水压致裂法进行了潞新矿区15个测点的地应力测试。结果表明:矿区应力场总体属于构造应力场,水平应力占优;矿区整体上属于中等偏低地应力值矿区,水平应力随着埋深的增加而增大;矿区侧压比绝大部分位于1.0～2.0之间,而且随着埋深的增加逐渐减小;断层不但影响最大水平主应力方向,而且对应力值也有一定的影响;按照测试结果进行断层附近巷道支护设计,巷道变形量很小,稳定性较好。
Hydrofracturing was applied to testing geostress of 15 points in Lu＇ xin Mining Area. Results showed that geo-stress field of this area was tectonic stress field and horizontal stress was major principal stress. The area belonged to medium-low geo-stress area and horizontal stress increased with deep. Side-pressure ratio was within 1.0-2. 0 and reduced with deep. Faults influenced not only major principal stress＇ orientation, but also stress value. Supporting design of roadway near to fault was made according to test results, roadway deformation was very small and stability was good.
出处
《煤矿开采》
北大核心
2013年第3期75-77,共3页
Coal Mining Technology
关键词
水压致裂
地应力场
分布特征
支护设计
hydrofracturing
geo-stress field
distribution characteristic
supporting design
