软弱夹层对巷道顶板稳定性影响的 FLAC3D研究

摘要

Accordingtotheroofstabilityproblemof2107roadwayofNo.12-3 seam301panelinJinhuagong coalmine,byusingFLAC3Dsoftwaresimulatetheeffectofweakinterlayerdifferentthicknessanditsdistanceaway fromtheroofsurfacetoroofstabilitywhenwithoutsupporting.BasedonMATLABapplicationresponsesurfacemeth-odologycarriesoutregressionanalysisontherelationshipbetweentheroofloosecirclethicknesswiththeweakinter-layerthicknessanditsdistanceawayfromtheroofsurface,derivedtherelationalexpressionbetweenthethree.The resultsshowedthatwhentheweakinterlayerthicknessis1.1m,itsdistanceawayfromtheroofsurfaceis1.65m, withoutsupporting,theroadwayroofloosecirclethicknessis1.29mandprovidesareferencefortheroadwaysup-portingdesign.%　　针对晋华宫矿12－3＃层301盘区2107巷顶板稳定性的问题，利用 FLAC3D软件模拟了软弱夹层不同厚度及距顶板表面距离，对无支护时顶板稳定性的影响，依托 MATLAB应用响应曲面法对顶板松动圈厚度与软弱夹层厚度和距顶板表面距离的关系进行回归分析，得出了三者之间的曲面关系式。结果显示，当软弱夹层厚度为1．1m，距顶板表面1．65m，无支护时巷道顶板松动圈厚度为1．29m，为巷道的支护设计提供了参考。