... and fracture propagation. Therefore, it is very important to study the mechanical properties of granite under high temperature and high pressure for optimizing drilling and fracturing design. wellbore design testing machine reservoir characterization ratio effect heat treatment wellbore integrity...

... the quantitative performance of a Vulcan Bolt during an underground seismic event. Upstream Oil & Gas testing machine displacement rock bolt metals & mining dynamic impact tester dynamic loading trolley dynamic ground support load cell Knox application Ground Support vulcan bolt...

... explore and compare the evolution of true triaxial testing machines spanning several world regions such as Russia, Asia and North America. Current standards of the specimen preparation are described and the problems related to true triaxial rock testing are then discussed. In general we classify...

... Characterization testing machine specimen machine stiffness interaction Upstream Oil & Gas synthetic specimen coefficient soft machine uniaxial compression test end friction axial strain aspect ratio end platen friction coefficient stress-strain curve structural geology loading machine...

.... This testing method is referred to as the split-platen compression test. The method used for this test involves placing a cylindrical sample of material between a set of eight concentric steel rings and the solid platen of a compression testing machine. Strain gauges are bonded to the outer surface...

... to actul engineering problems. They are suddenly and uncon- stant deformation. For examples, falling of ground, rock pillar failure,rock bursting. It must exist offset that to measure the consitutive relation of the rock using stiff testing machine and electric liquid servo-system control test- ing machine...

... for concrete (Swartz et al., 1982; Swartz and Go, 1984) and rock (Schmidt, 1976). Standard precracking methods require servocontrolled testing machines to arrest propagation of the crack after it is initiated. Once a specimen is precracked, fracture toughness can be measured using simple hydraulic testing...

... conventional data logger MPa metals & mining testing machine experiment loading stressmeter gage stiffness stress change transducer Salt Block platen design borehole-inclusion stressmeter measurement equation BOREHOLE-INCLUSION STRESSMETER MEASUREMENTS IN BEDDED SALT by C.W. Cook and E.S...

... an ordinary hydraulic com- pression testing machine upon reaching the peak strength (compressive strength), the sample fails in a more or less violent fashion, depending on the brittleness of the rock. Extrapolating these observations to the field, one might logically expect that a rock pillar upon being...

... of shielding. All compression tests were run using a 400,000-lb Tinius Olsen testing machine. No confining pressure was used in any of the tests reported in this chapter. EXPERIMENTAL MATERIAL The material used in all of the tests reported here was a coarsely crystalline quartz-dolomite rock from the Mr...

... and no attempt was made to further finish or smooth the sides. A Tinius Olsen hydraulic testing machine and an Olsen electronic recorder were used for conducting the tests. The testing machine had a swivel head but, after ensuring that it was parallel to the top of the test model, it was wedged to prevent...

... by the rapid release into the specimen of energy stored in the resilience of the testing machine. This is in contrast with a phenomenon, which may be observed frequently, where the rock immediately surrounding an excavation is both failed and subject to stress. By postulating a complete stress-strain curve...

.... Whether the specimen bursts violently or continues to deform at reduced loads beyond its compressive strength depends (except for the relatively few rocks which in small specimens exhibit inherently brittle behavior) on the "stiffness" or load-line of the compression testing machine. Suppose...