琅琊山铜矿地下采矿对复杂地表环境安全影响研究

Study on the Safety Influence of Underground Mining to Complex Surface Environment of Langyashan Copper Mine

为分析琅琊山铜矿地下采矿对矿区地表复杂的建(构)筑物造成的影响,建立了地表地形和地下开采模型,采用数值模拟方法对矿山地下采矿造成的地表沉降变形进行模拟,得出地表最大沉降值为48.4 mm,且各个沉降区域分布扩展较为均匀,倾斜变形、曲率及水平变形最大值均小于允许指标。采取模拟监测的方法,通过布置主监测线和辅助监测线来获得监测数据,对沉降变形进行修正。主监测线最大沉降值为45.99 mm,辅助监测线监测结果与主监测线监测结果相近。研究结果表明,沉降最大区域附近属于均匀变形,开采对地表建(构)筑物安全影响较小,同时也为矿山开展地质灾害防治工作提供了理论依据。

In order analyze the influence of underground mining to surface complex buildings and structures of Langyashan Copper Mine,the surface terrain and underground mining model is established,the surface subsidence caused by underground mining activity is simulated by numerical simulation method.The results show that the maximum surface subsidence value is 48.4 mm,and the distribution and spread of each subsidence area are uniform,maximum values of inclined deformation,curvature and horizontal deformation are less than the allowable indexes.The subsidence deformation obtained by numerical simulation is modified by the monitoring data acquired by the main monitoring line and auxiliary monitoring line arranged by means of simulated monitoring method.The maximum subsidence value of main monitoring line is 45.99 mm,the values of auxiliary monitoring line is consistent to the ones of main monitoring line.The study results show that the area near the maximum subsidence are is uniformly deformed,the mining activity has little influence on the safety of surface buildings and structures,which also provides a theoretical basis for the prevention and control of geological disasters in mines.