采动影响下煤岩体锚固效果研究与应用

摘要

以大同煤矿集团晋华宫矿采动影响巷道为背景，采用FLAC3D有限差分软件，建立了采动影响下巷道煤岩体开挖支护模型。对比分析了煤岩体中锚固巷道开挖过程中的变形特征，得出锚杆在煤体中的锚固效果明显弱于岩体中的锚固效果，煤体中采用三维锚杆索联合支护时锚固效果会明显提升。%TakestheminingroadwayofJinhuagongcoalmineinDatongcoalminegroupasbackground,builds theexcavatingandsupportingmodelofcoalandrockundertheinfluenceofminingroadwaybyusingFLAC3Dfinite differencesoftware.Comparesandanalyzesthedeformationcharacteristicsintheexcavationprocessofanchoringroad-wayincoalandrock,reachesthattheanchoringeffectofroadwaywithanchorsincoalisobviouslyweakthanthatin rock.Andafterinthecoalusesthecombinedsupportingofthree-dimensionalboltandanchorropetheanchoring effectwillbeimprovednotably.