... disturbed the cores. Most of the cores were broken, and the mudstone cores quickly lost water, cracked, and disintegrated after being taken out, making it difficult to obtain several columnar cores. Indoor uniaxial compressive strength tests were conducted using only a few short columnar mudstone cores...

... that the uniaxial compressive strength of calcareous shale decreases linearly under the actions of various water content. Microcracks and pores are formed during rock development. The coupling action of water and rock changes the mechanical properties of rocks. In response to this mechanical phenomenon, relevant...

... type and deep strong weathering type. The uniaxial compressive strength of the deep weakened rock mass is only 2.5-25 MPa, which is 70%-90% lower than that of the fresh rock mass. Compared with the natural state, the compressive strength of the saturated rock mass is reduced by 60%-90%. The deep...

... samples and granite samples with fractures at different inclination angles (30°, 45°, and 60°) were determined. Four specimens were selected for each of the angles. The uniaxial compressive strengths of intact samples and samples with fractures at different inclination angles are presented in Figure 2...

... fracturing reservoir geomechanics loading chinese journal uniaxial compressive strength mode evolution rock mechanic shear box loading qiang 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 062095 doi:10.1088/1755-1315/861...

... own holes but it is difficult to ensure easy drilling in stratum with strong anisotropy. In this paper, the rock breaking effect of self-rotating multi-orifice nozzle in coal rock was studied by experimental method. The uniaxial compressive strength, tensile strength and shear strength of experimental...

... of the developed genetic algorithm optimization of artificial neural network model when predicting uniaxial compressive strength using measurement-while-drilling data. Firstly, the objective tunnel is divided into four sections based on the geological conditions of the rock mass. Secondly, prediction model...

... geology reservoir geomechanics geologist wellbore integrity wellbore design society iop publishing iop conf environmental science 861 drillability tensile strength reservoir characterization conference uniaxial compressive strength shear strength characteristic hardness cohesion...

... geologist bashijiqike formation production control society iop publishing iop conf geology production monitoring reservoir characterization differential conference uniaxial compressive strength strength breakthrough environmental science 861 poisson coefficient prediction formula 11th...

... with the increase of the upper limit load and the number of cycles (figure 5). Except for Sample (0.6P&20Cycles), which showed no significant difference between the residual strength and the uniaxial compressive strength, the residual strength of other samples after cycling increased in different degrees compared...

... Abstract This study investigated the initial rock damages and their effects on the uniaxial compressive strength of soft rock (claystone) and hard rock (marble) using Computerized Tomography (CT) scanning. The soft rock (claystone) samples were initially damaged before sampling. The samples...

... plate tectonics reservoir characterization structural geology wellbore design strength conference society iop publishing iop conf uniaxial compressive strength geological subdiscipline geologist environmental science 861 reservoir geomechanics sandstone compressive strength characteristic...

... properties of hard rock to these thermal cycles can be helpful in improving the drilling efficiency. In this study, uniaxial compressive strength and elastic modulus of a moderately weathered granite after various thermal cycles were determined. Results show that, for the specimens treated at a temperature...

... excavation machines that commonly used in mine and tunnel projects for excavation of shafts. This study aimed to analyze the effect of intact rock properties (uniaxial compressive strength and indirect tensile strength) and RQD (rock quality designation), as well as fault zones on the performance of a RBM...

... Abstract Spectro-colorimtery and near infrared (NIR) spectroscopy has been applied to rocks for evaluating non-destructively their compressive strength. b* values (yellow) of Paleogene granite core samples showed a good correlation with the uniaxial compressive strength (UCS) (156–97 N/mm 2...

.... The latter phenomenon can be explained due to stress corrosion by unfrozen water or reduction in friction coefficient of crack surfaces by pore ice. Reservoir Characterization Kodama uniaxial compressive strength Shikotsu asian rock mechanics symposium arms8 dry specimen wet specimen Upstream...

... Abstract The purpose of this study is to examine the variation of physical properties and strength of magnetite due to microorganism throughout various laboratory tests such as absorption, elastic wave velocity, uniaxial compressive strength. For this purpose, pH and Eh with culture period...

... are employed to produce large blocks. Physical and mechanical property tests are carried out according to The International Society for Rock Mechanics (ISRM) standards including uniaxial compressive strength, Brazilian tensile strength, Schmidt hammer rebound values, Shore hardness values, static elasticity...

... this experimental period, uniaxial compressive strength, Schmidt hammer rebound value, uniaxial tensile strength, unit weight and apparent porosity parameters are determined. As well, same rock samples are conducted to small scale rock cutting test and cutting force and normal force is measured during cutting test...

... uniaxial compressive strength initial stress numerical analysis homogeneous size tunnel diameter Upstream Oil & Gas back analysis triangle distribution equivalent material property inhomogeneous rock mass 8th Asian Rock Mechanics Symposium Rock Mechanics for Global Issues í Shimizu, Kaneko...