DEFORMATION MODULI OF ROCKS

THERE IS A REAL NEED FOR MORE PRECISE DEFINITIONS OF PHYSICAL PROPERTIES OF ROCKS, PARTICULARLY THE DEFORMATION MODULI OF BOTH LABORATORY SPECIMENS AND ROCK MASSES IN SITU. A VITAL INITIAL STEP IN ESTABLISHING STANDARDS IS TO RECOGNIZE EXISTING PROBLEMS OF ENGINEERING APPLICATIONS. ONE OF THE PRIME PURPOSES OF THIS PAPER IS TO FURNISH BACKGROUND INFORMATION ON DEFORMATION MODULI SO THAT FURTHER STEPS IN SETTING UP STANDARDS CAN BE TAKEN. MORE BASIC AND APPLIED RESEARCH WILL BE REQUIRED BEFORE SATISFACTORY STANDARDS CAN BE ESTABLISHED. /AUTHOR/