基于地应力测量的深部矿区岩爆预测研究

Research on Prediction of Rock Burst in Deep Mining Area Based on In-situ Stress Measurement

地应力是引发诸多岩体灾害的基础作用力,为研究深部高地应力对深部开采的影响,以江西省德兴市银山矿区深部铜铅锌矿为例,利用水压致裂法对该矿区银山区的地应力进行了测试。基于地应力的测量数据,对银山区矿井深部围岩应力场进行了综合评价,应用Russenes判别法和Turchaninov判别法对岩爆倾向性进行了评估。结果表明,在108.0~472.0 m深度的测深范围内,最大水平主应力总体为16.5~41.5 MPa,方向稳定为NNE—NE,最小水平主应力为10.6~25.1 MPa。对于明显偏离最大水平主应力方向(约NE27°)的开采巷道,施工期发生岩爆的可能性更大,为今后类似的工程提供一定的理论依据与指导。

Ground stress is the basic force that triggers many rock hazards.To study the influence of deep high-ground stress on deep mining,the ground stress in the silver mountain area of the deep copper-lead-zinc mine in Dexing City,Jiangxi Province,was tested using the hydraulic fracturing method.Based on the measured data of ground stress,a comprehensive evaluation of the stress field of the deep surround⁃ing rock of the mine in Yinsan District was carried out,and the tendency of rock explosion was assessed by applying Russenes discriminant method and Turchaninovs discriminant method.The results show that within the depth range of 108.0~472.0 m,the overall range of maximum horizontal principal stress is 16.5~41.5 MPa,from NNE to NE direction,the minimum horizontal principal stress is 10.6~25.1 MPa.For mining tun⁃nels that deviate significantly from the direction of the maximum horizontal principal stress(about NE27°),the possibility of rockburst during the construction period is greater.It provides some theoretical basis and guidance for similar projects in the future.