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《Coal Science and Technology》 2014-01
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Study on Elastic Foundation Beam Model of Cracked Coal Seam Roadway Roof with Ultra Large Section

HE Fu-lian;WANG Xiao-ming;XIE Sheng-rong;School of Resources and Safety Engineering,China University of Mining and Technology( Beijing);  
In order to reveal the failure mechanism of cracked thick coal seam roadways with ultra large section and effectively control its surrounding rock,the Winkler elastic foundation beam theory was applied to establish the elastic foundation beam mechanical model of roadway roof. Besides,characteristic function formula of the subsidence of coal roadway roof and roof rock beam moment was obtained. In addition,the variation relationship between roof subsidence and roof rock beam moment was analyzed,and was applied in Dongpo Mine. The field practice showed that when the new type of pre- stressed truss anchor cable support system was used. On the basis of this calculation result of the model,the surrounding rock control problem of cracked thick coal seam roadways was effectively solved,and the practice result proved the rationality of the model.
【Fund】: 国家自然科学基金资助项目(51234005);; 国家重大基础研究发展计划(973计划)资助项目(2010CB226800);; 中央高校基本科研业务费专项资金资助项目(2010YZ02)
【CateGory Index】: TD32
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