矿井深部三维地应力场测量与特征分析

Analysis on Measurement and Features of Deep Mine 3D Ground Stress Filed

针对姚桥煤矿-800 m水平深部巷道破坏严重,采用岩石Kaiser效应测量方法,对该矿进行了地应力场测量。通过在定向岩心6个特殊方向取样,经声发射试验得到了各方向的单个应力,经计算得出了原岩主应力的大小及方向等参数。结果表明:-800 m水平最大主应力为19.00 MPa,属中高应力区,存在一定的构造应力。经-650 m水平与-850 m水平测量结果比较,得到了姚桥煤矿以-800 m为界,上部岩层主要受构造应力控制,-800 m以下以自重应力为主。

According to the serious failure occurred in the -800 m level deep mine roadway of Yaoqiao Mine, a rock Kaiser effect meas- uring method was applied to the mine ground stress measurement. With the six special direction sampling of the directional cores, the sin- gle plus stress value in each direction was obtained with the acoustic emitting experiments. The size and direction of the in-situ principal stress was obtained with the calculation. The results showed that the max principal stress of the -800 m level was 19. 00 MPa and the level was a medium high stress zone. Certain structure stress was existed in the -800 m level. In comparison with the measured resuhs between the -650 m level and the -850 m level, the -800 m as the boundary of Yaoqiao Mine was obtained. The overlying strata were mainly con- trolled by the structure stress and the strata below -800 m would be controlled by the self weight stress mainly.