This book contains the Proceedings of EUROCK 2013 - The 2013 ISRM International Symposium, which was held on 23-26 September 2013 in Wroclaw, Poland. The Symposium was organized by the ISRM National Group POLAND and the Institute of Geotechnics and Hydrotechnics of the Wroclaw Institute of Technology. The focus of the Symposium was on recent developments in the field of rock mechanics with an emphasis on the application of rock mechanics to the extraction of natural resources, securing energy supplies and protecting of the environment surrounding rock that is subjected to engineering activities. The main topics, which were covered in the 150 papers (including six keynote papers) that make up this book are: rock mass characterization, laboratory and in-situ testing, constitutive models and numerical modeling, mathematical modeling of THM processes in rocks, mine design and ground control, underground storage and waste disposal, slope and open pit stability, dynamic phenomena in rock masses, design methodology in rock engineering, mechanical breakage of rocks, rock tunnel excavation and support, petroleum rock mechanics and geological CO2 sequestration. The book also includes the 2013 ISRM Franklin Lecture by A. Goricki on the engineering aspects of geotechnical tunnel design. The book will be of interest and value to rock mechanics researchers as well as to professionals who are involved in the various branches of rock engineering.