黑体加粗1000－7598.doc

文章编号（黑体加粗）：1000－7598－(2003) 02―0304―03（编号用Times New Roman） 空2行（单倍行距） 页面设置：页边距 上：2cm(首页)、2.5cm(奇偶页), 下：1.6cm, 左: 2cm, 右: 2cm; 距边界: 页眉: 1.5cm, 页脚: 1.6cm 文档网格: 每行46个字, 每页49行 花岗岩张拉和压剪裂隙渗透率演化研究 张帆1,2，王亮1，吕涛3，盛谦2，周辉2，胡大伟2 （1. 湖北工业大学 土木工程与建筑学院，湖北 武汉 430068；2. 中国科学院武汉岩土力学研究所 岩土力学和工程国家重点实验室，湖北 武汉 430071；3. 中国核电工程有限公司，北京TU 443（Times New Roman） 文献标识码：A 空2行（固定值：12磅） Investigations on Permeability Evolution of granite with tensile and compressive-shear cracks ZHANG Fan1,2, WANG Liang1, LV Tao3, ZHOU Hui2, HU Dawei2 (1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan 430068, China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan Hubei 430071 China, 3. China Nuclear Power Engineering Co., Ltd, Beijing 100840, China) Abstract: Two failure types: Tensile and compressive-shear failures are usually generated by excavation of surrounding rocks in underground engineering. The cracks induced by the two type failure exhibit different micro-configurations, leading to different permeability evolutions of rock with tensile and compressive-shear cracks. For this purpose, the tensile and compressive-shear cracks of granites were firstly generated by triaxial compression tests under different confining pressures and the permeability tests were conducted on the samples with tensile and compressive-shear cracks. The experimental results shown that the permeability of the first one was more sensitive to hydrostatic pressure. In order to analyze the micromechanical structures of cracks, the scanning electron microscope tests were also performed on the surfaces of tensile and compressive-shear cracks. The tensile cracks dominated by axial compression tests and the crack surfaces are relatively smooth. With increasing of confining pressure, the micromechanical structures of cracks surfaces changed clearly, more and more compressive-shear cracks were generated on th