缓倾斜矿体开采地表沉降模拟

为最大限度地开采地下矿体并保护地表构筑物的安全，以基本空场法开采的某个缓倾斜多金属矿床为工程实际，运用FLAC3D建立三维模型，结合后处理软件TECPLOT进行地表沉降规律模拟研究，并根据模拟结果绘制地表沉降曲线图。研究结果表明：沉降等值线基本遵循塌沉形态分布；采空区上方地表下沉最大，同一方向上越远离中心下沉值越小。地表最大沉降位移为120.9 mm，地表村庄除杨家村最大沉降值为24 mm处于危险圈定范围内，其他地表构筑物均处于开采损害范围之外；模拟沉降计算结果为地下矿体开采和地表村庄构筑物影响研究提供一定的理论依据，具有重要的现实意义。

Simulation on Surface Subsidence Induced by Mining of Gentle Inclined Deposit

In order to maximize the exploitation of underground ore body and ensure the safety of surface structures on ground，based on a mining engineering example of gentle inclined polymetallic deposit with open-stope method，a three-dimensional model was established with the FLAC3D and the rules of surface subsidence were simulated with the TECPLOT.Eventually，the curve chart of surface settlement was plotted in accordance with the simulated results.The results showed that the subsidence contour line basically follows the sinking form.The surface depression above mined-out area appears maximum and the further away from center is，the smaller subsidence value on the same direction is.The largest surface deposition distance is 120.9 mm，and other surface structures are out of mining damage except for Yangjiacun in dangerous area with the largest settling value of 24 mm.The simulated results of subsidence provide a certain theoretical foundation for exploiting the ore body underground and investigating the incidence with surface structures，which has a crucial practical significance.