Bolt support mechanism based on elastic theory

作     者：Guo Xiaoqian Mao Xianbiao Ma Chao Huang Jinglong 

作者机构：State Key Laboratory of Geomechanics & Deep Underground Engineering China University of Mining & Technology School of Mechanics & Civil Engineering China University of Mining & Technology Hunan Provincial Key Laboratory of Healthy Maintenance for Mechanical Equipment Hunan University of Science and Technology 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2013年第23卷第4期

页      面：468-473页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 081401[工学-岩土工程] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：supported by the Special Funds of the National Natural Science Foundation of China(No.51227003) the National Natural Science Foundation of China(No.51074166) the Universities Natural Science Research Project of Jiangsu Province(No.11kjd13002) 

主　　题：Elastic theory Bolt support Displacement function method Stress along bolt axes 

摘      要：Mechanical model of anchorage surrounding rock considering tray effect was established based on elastic theory,in order to study the mechanism of bolt supporting.Elastic solutions of normal force at point in the interior of a semi-infnite solid were obtained by means of classical displacement function method in elasticity.The factors which influence stress of bolted surrounding rock,such as the length of bolt and tray effect,were analyzed.The absolute value of stress along bolt axes decreased rapidly with an increase in radical distance and the maximum appeared near ends of bolt.With increasing radical distance,the value of radical stress changed from positive to negative roughly and then increased to zero,with maximum at the middle of bolt.The evolution of hoop stress as radical distance increasing was similar with stress along bolt axes.With an increase in depth,the radical effect ranges of all normal stress components were reduced.These suggest that the effect from tray on stress along bolt axes of bolted surrounding rock could be neglected,except near surface of surrounding rock.