DESIGN METHOD FOR SHAFT WALL STRENGTH OF COAL MINE CONSIDERING INFLUENCE OF TEMPERATURE STRESS
LIU Jinlong1,CHEN Luwang 2,WANG Jili3
(1. Department of Civil Engineering,Hefei University,Hefei,Anhui 230022,China;2. School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 230009,China;3. Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)
Abstract:Lots of fractured shaft walls are analyzed by the code method,it is indicated that the results by code method are not consistent with the realities mostly. The temperature difference can cause the changes of strain and stress of shaft wall,while the temperature stress has not been considered in the code method,which may be the key reason leading the inaccurate result of code method. So,it is necessary to modify the code method and consider the influence of temperature stress. Based on the elastic theory,the calculation formula for design strength of shaft wall considering the influence of temperature stress is proposed. The mathematic characteristics of the formula is analyzed;and its uncertainty and modified idea are investigated. Considering the complexity of shaft wall design,in order to improve the scientificalness,rationality and validity of the code method,it is advised that further research and discussion should be brought out.
中华人民共和国国家标准编写组. GB/50384—2007煤矿立井井筒及硐室设计规范[S]. 北京:中国计划出版社,2007.(The National Standards Complication Group of People?s Republic of China. GB/50384—2007 Code for design of coal mine shaft and chamber[S]. Beijing:China Planning Press,2007.(in Chinese))
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