High prestress truss cable support principle and its application in large cross section coal roadway  

作　　者：姚精明 何富连 萧潇 

机构地区：[1]State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of Coal Science & Engineering(China)》2007年第1期18-21,共4页煤炭学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （50074030） and Dr. Special fund of the Ministry of Education （20030290017）

摘　　要：With the enlarge of cross section of roadway, the radius of plastic area and broken area increase, and the tensile stress and shear stress distributing in roof coal-rock layers relevantly increase, which induce support effect not obvious for ordinary bolt（cable）. While bounding point and support structure of the truss cable is in vertex angle of roadway, and supplies coal-rock layers in bounding area with the horizontal and vertical pressure, so it settles the support problems in large cross section coal roadway. From the point of view of mechanics, gave emphasis on the invalid mechanics of ordinary bolt （cable） in large cross section coal roadway and supported mechanics of prestress truss cable. The author successfully used this technique in Wuyang Mine, and had the huge economic efficiency and the social benefit.

关 键 词：truss cable large cross section roadway ordinary bolt （cable） PRESTRESS 

分 类 号：TD353.3[矿业工程—矿井建设]