复杂空区群对周边地质体环境影响研究

为了研究某矿山井下复杂空区群对周边地质体环境的影响, 根据现场空区实测数据, 采用多款工程应用软件相结合的方式, 精确建立了计算区域的数值计算网格模型, 并对计算结果进行了研究分析。结果表明: 区域内地表存在两个不同幅值的沉降中心, 但空区对地表环境影响不明显。空区的形成扰动了地质体内部环境, 造成空区周边围岩局部区域位移增加以及应力集中, 但应力峰值远小于围岩的极限强度。空区间存在复杂的相互作用关系, 在现有地应力及空区赋存条件下, 下部中段空区对上部中段空区周边围岩应力分布影响很小, 但对位移的分布有显著影响。

Study on Effect of Complicated Goaf Group on Surrounding Geologic-body Environment

In order to study the effect of complicated goaf group on geologic body surrounding environment, an accurate numerical calculation grid model was established based on in-site cavity monitoring data through combining several engineering software. The results show there are two different amplitudes of the settlement center on the ground surface, but the effect of mind-out area on the surface environment is not obvious. Formation of mind-out area disturbs the geologic-body's inner environment, resulting in local displacement increased and stress concentrated in the surrounding rock around mind-out area, but the stress peak is much lower than the ultimate strength of rock. A complicated interaction exists between the mined-out area. Under the current stress and cavity occurrence condition, the lower sublevel mined-out area has a very slight impact on the upper sublevel surrounding rock stress distribution, but a significant influence on the displacement distribution.