复杂空区群对周边地质体环境影响研究

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

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。

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.