... ABSTRACT: In the soil improvement by mechanical stirring, an improved pile is made by stirring cement milk and local soil using characteristic blades in the underground. In order to get the improved pile which satisfies high quality and predetermined compressive strength, it becomes a big...

... ABSTRACT: The goal of this study is to improve the analysis of the stability of pillars and to answer the question of the choice of the pillar strength using an empirical approach. The pillar strength depends mainly on two factors: the uniaxial compression strength and the pillar geometry. We...

... and the equation of the straight line is as follows. Among them, is the uniaxial compression stress; Ea is the elastic modulus; is the uniaxial compres- sion strain; b is the intercept. cr which is showed in Figure 1 represents the real uniaxial compression strength of rock specimen; ci represents the ideal...

... as a computational tool to validate the model and an example has been solved to illustrate the results. Reservoir Characterization risk assessment risk and uncertainty assessment strength reservoir geomechanics Upstream Oil & Gas risk management compression strength mechanism plane basic...

... imaging the RQD index was recorded. In Figure 4 the RQD index is compared with the uniaxial compression strength from laboratory tests for the gneiss. The scattering of uniaxial compression strength up to a depth of about 10 m below surface corresponds to the scattering of the RQD index. Below this depth...