Laser scanners and image matching algorithms produce large amounts of 3D data, allowing detailed and accurate descriptions of objects. This is true, though, only if interactive or automated software tools are available, to extract the information relevant to the specific task from raw 3D data sets without too much user interaction. In the last two years our group has been involved in applying n...

considering the fact that rocks fail faster under tensile stress, rock tensile strength is of greatimportance in applications such as blasting, rock fragmentation, slope stability, hydraulic fracturing,caprock integrity, and geothermal energy extraction. there are two direct and indirect methods tomeasure tensile strength. since direct methods always encompass difficulties in test setup, indire...

Using X-ray computed microtomography, we have visualized and quantified the in situ structure of a trapped nonwetting phase (oil) in a highly heterogeneous carbonate rock after injecting a wetting phase (brine) at low and high capillary numbers. We imaged the process of capillary desaturation in 3D and demonstrated its impacts on the trapped nonwetting phase cluster size distribution. We have i...

The main objective in production blasting is to achieve a proper fragmentation. In this paper, rock fragmentation the Sarcheshmeh copper mine has been predicted by developing a model using artificial neural network. To construct the model, parameters such as burden to spacing ratio, holediameter, stemming, total charge-per-delay and point load index have been considered as input parameters. A m...

Nine blasts with cylindrical granite specimens were carried out under different stemming conditions. All rock had a diameter of 240 mm and length 300 mm. Explosive Pentaerythritol tetranitrate (PETN) specific charges 0.2 0.3 kg/m3 used, the in large explosion chamber. Each specimen was enclosed by steel box chamber during blasting, without constraint or confinement to from lateral top sides. Du...