围压水压耦合作用下岩石变形特征试验研究 .pdfVIP

学兔兔 第25卷6期 中 国 煤 炭 地 质 Vo1．25 No．06 2013年 6月 C0AL GE0L0GY 0F CHlNA Jun． 2013 doi：10．39690．issn．1674—1803．2013．05．08 文章编号：1674—1803(2013)06—0036—06 围压水压耦合作用下岩石变形特征试验研究 刘冉斌 (中煤科工集团西安研究院，西安，710054) 摘 要：为了研究岩石变形特征围压水压耦合效应，进行了不同岩性岩石不同围压、水压条件下，计算了岩石的变形 参数，分析了弹性模量、泊松比与围压和水压的关系，建立了弹性模量围压效应与泊松比水压效应拟合方程。 研究 表明弹性模量与围压正相关，呈对数关系；随着围压的增大，泊松比围压效应降低；弹性模量水压效应与岩石岩性 有关；泊松比与水压正相关，呈线性关系。 关键词：弹性模量；泊松比；变形；耦合作用 中图分类号： TD315 文献标识码：A An Experimental Research on Rock Deformation Characteristics under Coupling Interaction of Confining Pressure and Hydraulic Pressure Liu Zaibin (Xian Research Institute of China Coal Technology and Engineering Group Corp，Xian，Shaanxi 7 1 0054) Abstract：To study the rock deformation characteristics under the coupling interaction of confining pressure and hydraulic pressure，tri— axial compression tests of different rocks under different confining pressures and hydraulic pressures have been carried out to compute rock deformation parameters．Relations between elastic modulus，Poisson’s ratio，confining pressure and hydraulic pressure have been analyzed and given the fitting equation of elastic modulus confining pressure effect and Poisson’s ratio hydraulic effect．The study has shown：elastic modulus and confining pressure is positively and logarithmically related；along with the increasing of confining pressure， the confining effect of Poisson’s ratio decreased；elastic modulus hydraulic pressure effect is related to the lithology of rocks；Po