Double-directional control bolt support technology and engineering application at large span Y-type intersections in deep coal mines  

作　　者：GUO, Zhibiao  SHI, Jianjun  WANG, Jiong  CAI, Feng  WANG, Fuqiang 

机构地区：[1]state key laboratory of geomechanics and deep underground engineering,beijing 100083,china institute of geotechnical engineering,china university of mining & technology,beijing 100083,china [2]safety engineering college,north china university of science & technology,beijing 101601,china

出　　处：《Mining Science and Technology》2010年第2期254-259,共6页矿业科学技术（英文版）

基　　金：supported by the National Basic Research Program of China (No.2006CB202200);the Major Program of the National Natural Science Foundation of China (No.50490270);the Innovative Team Development Project of the Ministry of Education of China (No.IRT0656)

摘　　要：Under deep and complex geological conditions,severe deformation occurs at intersection points of Y-type roadways with large cross sections during engineering projects in coal mines,especially at junction arches.Based on in-situ investigations and theoretical studies,we have summarized typical forms of destruction and identified high stress and unrestricted support at both sides of junction arch as its main causes.In this study,we also presented double-directional control bolt support technology for a large Y-type span intersection,applied to deep intersection engineering in the Jiahe Coal Mine,which has proved effective.Under deep and complex geological conditions,severe deformation occurs at intersection points of Y-type roadways with large cross sections during engineering projects in coal mines,especially at junction arches.Based on in-situ investigations and theoretical studies,we have summarized typical forms of destruction and identified high stress and unrestricted support at both sides of junction arch as its main causes.In this study,we also presented double-directional control bolt support technology for a large Y-type span intersection,applied to deep intersection engineering in the Jiahe Coal Mine,which has proved effective.

关 键 词：Y-type intersection double-directional control bolt support deep coal mines 

分 类 号：TD8[矿业工程—矿山开采]