1、 1900 英文单词，英文单词，1 万英文字符，中文万英文字符，中文3000 字字 文献出处：文献出处： Mohammad N, Reddish D J, Stace L R. The relation between in situ and laboratory rock properties used in numerical modellingJ. International Journal of Rock Mechanics and Mining Sciences, 1997, 34(2): 289-297. 英文原文: The Relation Between In situ and
2、 Laboratory RockProperties Used in Numerical Modelling 1.INTRODUCTION Numerical models are being used increasingly for rock mechanics design as cheaper and more efficient software and hardware become available. However, a crucial step in modelling is the determination of rock mass mechanical propert
3、ies, more precisely rock stiffness and strength properties. This paper presents the results of a review of numerical modelling stiffness and strength propertiesused to simulate rock masses. Papers where laboratory and modelling properties are given have been selected from the mass of more general mo
4、delling literature. More specifically papers that have reduced stiffness and/or strength parameters from laboratory to field values have been targeted. The result of the search has been surprising: of the thousands of papers on numerical modelling, a few hundred mention laboratory and rock mass prop
5、erties, and of those, only some 40 appear to apply some kind of reduction. The papers that apply a reduction have been used to produce the graphs that constitute the main content of this paper. Rock stiffness properties have been separated from those of strength in the analysis and this has illustra
6、ted interesting differences in their respective average reduction factors. 2.METHODOLOGY The review conducted has studied case histories and back analysis examples of numerical modelling for a wide range of rock structures. Each reviewed paper has been databased in terms of laboratory measured rock properties and numerical modelling rock mass input properties plus other relevant quantitative data 1-37.The vast majority of papers have provided incomplete data either omitting key parameters or
