水厂铁矿深部边坡岩体水压致裂地应力测量与分析

In-situ Stress Measurement and Analysis of the Deep Slope Rockmass with Hydro-fracturing Method in Shuichang Iron Mine

对水厂铁矿区域工程地质进行了分析,采用水压致裂法对该矿深部边坡岩体进行了3个钻孔11个测段的地应力测量。结果表明:最大水平主应力方向平均为N82°E,与华北地区的主应力方向基本一致;最大水平主应力与最小水平主应力大小之比约为1.5;最大水平主应力的大小为2.16～14.79MPa,最小水平主应力的大小为1.66～8.00MPa,水平主应力是垂直应力的0.57～2.9倍。

This paper analyses region engineering geology of Shuichang iron mine. With hydro-fracturing method, the in-situ stress measurement was carried out on 11 measuring segment of 3 bores in deep slope rockmass. It indicates by test result that orientation of the maximum horizontal main stress is N82°E, (identical )to orientation of the main stress in north China , and σ_1/σ_2 is about 1.5, σ_1 is_2.16 ～14.79 MPa, σ_2 is 1.66 ～ (8.00 )MPa, the ratio of the horizontal main stress to the vertical stress is 0.57～2.9.