Deformation effect of lateral roof roadway in close coal seams after repeated mining

查看全文 作　　者：Xie [1]Jianlin;Xu [1,2]Jialin;Wang [1,2]Feng;Guo [1,2]Jiekai;Liu [3]Donglin

机构地区：[1]State Key Laboratory of Coal Resources and Safety Mining, China University of Mining and Technology;[2]School of Mines, China University of Mining and Technology;[3]No. 1 Coal Mine of Pingdingshan Tian’an Coal Industry CO Ltd.

出　　处：《International Journal of Mining Science and Technology》索引2014年第24卷第5期,共5页

基　　金：Financial supports from the National Natural Science Foundation of China (No. 51204160);the Priority Academic Program Development of Jiangsu Higher Education Institutions of China(No.SZBF2011-6-B35);the National Science and Technology Support Program of China(No.2012BAK04B06);the Project Funded by State Key Laboratory of Coal Resources and Safe Mining of China(No.SKLCRSM11X03) 摘　　要：This paper analyzed the deformation mechanism in lateral roof roadway of the Ding Wu-3 roadway which was disturbed by repeated mining of close coal seams Wu-8 and Wu-10 in Pingdingshan No. 1Mine. To determine the strata disturbance scope, the strata displacement angle was used to calculate the protection pillar width. A numerical model was built considering the field geological conditions. In simulation, the mining stress borderline was defined as the contour where the induced stress is 1.5 times of the original stress. Simulation results show the mining stress borderline of the lateral roadway extended 91.7 m outward after repeated mining. Then the original stress increased, deforming the roadway of interest. This deformation agreed with the in situ observations. Moreover, the strata displacement angle changed due to repeated mining. Therefore, reselection of the displacement angle was required to design the protective pillar width. Since a constant strata displacement angle was used in traditional design, the proposed method was beneficial in field cases. 关键词：变形效果煤层开采挖掘巷道车顶诱导应力传统设计位移角

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Deformation effect of lateral roof roadway in close coal seams after repeated mining

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