煤层底板采动应力场及变形破坏特征的数值模拟研究

Numerical Simulation of Stress Fields and Deformation Failure Characteristics of Coal Seam Floor in Mining Process

采用FLAC3D数值模拟软件对煤层底板下不同深度处岩体应力场及位移场分布特征进行模拟,得出了采动过程中煤层底板最大破坏深度及最易破坏位置。研究结果表明,运用数值模拟方法,可以较为全面地揭示采动条件下底板岩体的应力场、变形破坏特征及破坏范围、深度,有利于选择、优化设计方案,同时减少试验时间,提高矿井的经济效益与社会效益。

The distributions of stress and displacement fields at different depths in coal seam floor were simulated using numerical simulation software FLAC^3D, and the maximum failure depth and the most easily damaged position in coal seam floor in mining process were found out. The resuhs showed that numerical simulation can more comprehensively reveal the stress fields, deformation and failure characteristics, and failure range and depth of rock mass in coal seam floor under mining, these are favourable to select and optimize design mining scheme and reduce the testing time, so improve the economic and social benefits of mine.