supported by the National Natural Science Foundations of China (Grant Nos. 40872170,40902077 and 41072196);the Doctoral Program Foundation of Higher Education of China (Grant No. 20090061110054);2010 non-profit scientific special research funds of Ministry of Water Resources (Grant No. 201001008);Jilin University's 985 project (Grant No. 450070021107);the Graduate Innovation Fund of Jilin University (Grant No. 20121073)
Rock-quality designation(RQD) plays a significant role in rock mass analysis and is an important parameter in geotechnical and geological engineering.However,the RQD variation with scanline length has not yet been com...