1、 4500 英文单词，英文单词，2.5 万英文字符，中文万英文字符，中文 7500 字字 文献出处：文献出处：Coggan J, Gao F, Stead D, et al. Numerical modelling of the effects of weak immediate roof lithology on coal mine roadway stabilityJ. International Journal of Coal Geology, 2012, 90: 100-109. 英文原文： Numerical modelling of the effects of weak imme
2、diate roof lithology on coal mine roadway stability John Coggan a, Fuqiang Gao b, Doug Stead b, Davide Elmo c a Camborne School of Mines, University of Exeter, United Kingdom b Simon Fraser University, Burnaby, British Columbia, Canada c Golder Associates, Vancouver, Canada Article history: Received
3、 31 August 2011 Received in revised form 7 November 2011 Accepted 7 November 2011 Available online 13 November 2011 Keywords: Tunnel roof lithology Numerical modelling In-situ stress Stress redistribution Coal mine roadway stability ABSTRACT The stability and associated design of roof reinforcement
4、requirements of tunnels driven in United Kingdom Coal Measures strata is directly related to the engineering characteristics of the immediate roof lithology and the effects of redistribution of the in-situ stress. Numerical modelling carried out by the authors has been used to simulate the widely observed detrimental effects of both high horizontal stress and weak immediate roof lithology on tunnel roof stability. Different numerical modelling techniques, such as continuum, disco
