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采用小孔径水压致裂法对潞新矿区进行了地应力实测,表明矿区属于构造应力场类型,主应力大小和方向受断层影响较大。运用ANSYS和FLAC~(3D),对构造应力场进行数值反演,显示断层附近的应力量值的变化复杂,端部出现较大的应力集中。多断层对岩体应力状态的影响更为复杂,断层间的相互作用会使应力叠加,增大应力集中的范围和强度。实测和数值反演相结合是构建矿区应力场的有效方法。
The small bore hydrofracturing method was used to measure the geostress of Luxin coal mine, which indicates that the mining area belongs to tectonic stress field and the size and direction of principal stress are greatly influenced by the fault. Using ANSYS and FLAC ~ (3D), numerical inversion of tectonic stress field shows that the change of stress magnitude near the fault is complex, and a large stress concentration occurs at the end. The effect of multiple faults on the stress state of the rock mass is more complicated. The interaction between the faults will make the stress superposition and increase the range and intensity of stress concentration. The combination of measured and numerical inversion is an effective method to construct the stress field in the mining area.