自然崩落法矿山深部地应力场分布规律的测试研究

采用LUT 地应力测试系统对中条山集团铜矿峪铜矿深部矿区进行了地应力测量, 发现该矿区地应力的主应力随埋深增加呈近线性增加, 埋深最大的340 m中段测点处最大主应力值达到了37.83 MPa; 最大主应力的方位在浅部和深部表现出较好的一致性, 均为北东东向。深部矿区的原岩应力以水平构造应力为主, 上部岩层垮塌使下部邻近区域的最大主应力的倾角明显增大, 其影响程度随深度增加而减弱。该研究成果将对自然崩落法矿山的采矿工艺设计和安全生产具有指导作用。

Research on In-situ Stress Distribution in Deep Mine with Natural Caving Method

LUT-based measurement system for in-situ stress was used in the deep mining area of Tongkuangyu Copper Mine. Results showed that the principal stress linearly increased with an increase in depth, and σ1 reached 37.73 MPa at 340 m level, and their orientation are all in NEE direction showing a consistency. The horizontal stress accounts for the majority of initial rock stress in the deep mine and inclination angle of σ₁ in nearby area beneath is obviously increased due to the falling of the upper floor, but such effect will become weaker with an increase in depth. The research result can be used as reference for future mining process design as well as safety production.