... lining structure are studied based on the three-dimensional finite element calculation theory, so as to determine the optimal thickness of concrete lining. The maximum tensile stress of 20cm lining during operation is about 8.73MPa, and that of 120cm lining during operation is about 4.68MPa. The maximum...

... on the elastic wave equation propagation theory and the superposition principle of the elastic theory, a numerical model for simulating the maximum tensile stress caused by pulsation stress in orthotropic coal rock is established. Then the effect of the coal rock orthotropic characteristics, amplitude, frequency...

... Abstract: In this study three series of indirect tensile tests, the Brazilian test, the flattened Brazilian (FB) test and the ring test, were performed in order to determine the indirect maximum tensile stress of Dionysos marble. A number of circular disc specimens ( D = 54 mm) was prepared...

... the maximum confining stress. As the confining pressures and perforation angles increased, the fractures initiated from center hole of rock specimen rather than pre-cracks. Based on the maximum tensile stress criterion, the numerical analyses matched the experimental results well. 1. INTRODUCTION...

... and Airy stress functions, stress components are investigated in a tensile positive fashion. Results are obtained in series form to facilitate parametric studies on the influence of the loading angle and geometric characteristics of the ring on the maximum tensile stress. Results indicate that for a ring...

... of the maximum, minimum, and average, maximum tensile stress. A criterion based on the Averaged Maximum Tensile Stress (AMTS) was found to give good agreement with the thickness of core disks measured on core from 75-mm-diameter boreholes. This approach was then used to establish a general core disking nomogram...

... and a represents the radius of the disk [1,2]. relation diametrical compression test tensile strain tensile principal stress Upstream Oil & Gas GPa maximum tensile stress specimen maximum principal tensile stress equation calculation principal elastic axis area 4 principal tensile stress...

... mechanism stability Artificial Intelligence service life period floor heave problem entry-pillar system maximum tensile stress floor condition coal weak floor condition strong roof stiff pillar pillar weak coal pillar design geological condition Rock Mechanics as a Guide for Efficient...

... Reservoir Characterization displacement maximum tensile stress Upstream Oil & Gas Rock mechanics reservoir geomechanics criterion singularity geometry integration equation productivity stress field University crack tip fracture displacement field hydraulic fracturing...