LiXiaobin, HeFulian, QinBinbin, LüKai, HeWenrui. Study on classification and support of surrounding rock of mining roadway in extremely close coal seams[J]. Journal of Mining Science and Technology, 2020, 5(3): 325-333.
Citation:
LiXiaobin, HeFulian, QinBinbin, LüKai, HeWenrui. Study on classification and support of surrounding rock of mining roadway in extremely close coal seams[J]. Journal of Mining Science and Technology, 2020, 5(3): 325-333.
LiXiaobin, HeFulian, QinBinbin, LüKai, HeWenrui. Study on classification and support of surrounding rock of mining roadway in extremely close coal seams[J]. Journal of Mining Science and Technology, 2020, 5(3): 325-333.
Citation:
LiXiaobin, HeFulian, QinBinbin, LüKai, HeWenrui. Study on classification and support of surrounding rock of mining roadway in extremely close coal seams[J]. Journal of Mining Science and Technology, 2020, 5(3): 325-333.
Inordertoexplorethestabilitycategoryandsupportmodeofsurroundingrockof mining roadwayinextremelyclosecoalseams,thestabilitycategoryofsurroundingrockisdeterminedbycomprehensiveevaluationwithmathematicalmethod.Firstly,themathematicalmodelisestablishedbyusing themethodoffuzzycomprehensiveevaluation,andfactorssuchasthenatureofsurroundingrockand stress environment are selected as the classification index of surrounding rock.Then, fuzzy comprehensive discriminant matrix,index weight and membership degree of surrounding rock are solved.Then,theclassificationofsurroundingrockstabilityisverifiedbythemethodofgreycorrelation degreeanalysis.Finally,thecorrespondingroadwaysupportmodeisputforward.Theresultsshowthat degreesofmembershipofminingroadwayinextremelyclosecoalseamstoⅠ-Ⅴtypesurrounding rocksare0.1846,0.2117,0.1866,0.1776and0.2394,respectively.Thedegreeofmembershipof Vtypesurroundingrockisthelargest,whichisconsistentwiththeverificationresults.Surroundingrock belongstoVtypeextremelyunstablesurroundingrock.Inaddition,theroofisbrokenandroadwaypressureissmallduetoextremelyclosemining.ThenU-shapedsteelbeamshedsupportisproposed.The observationofrockpressureshowsthattheeffectofroadwaysupportisremarkable.
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