... stress operation period construction period increase percentage china government maximum compressive stress steel geological subdiscipline class iv class iii bearing capacity thickness maintenance period concrete lining ARMA 23 0603 Study on the mechanical characteristics and optimization...

..., aquifer formations or depleted hydrocarbon reservoir fields. However, many important aspects have to be studied before its full-scale implementation, among them (1) the effect of spatial variation of rock mass properties and (2) hydrogen embrittlement on the steel lining. We present a numerical study...

... void. Once completed the project will allow for a total increase of 900,000 cubic metres of storage. Furthermore, a finite element study has been conducted to investigate the structural performance of a proposed design using corrugated steel sheets. Stresses and displacements are studied taking...

... ABSTRACT: Corrosion of tubing steel induced by H 2 S and CO 2 is an important risk factor for oilfield production and development. The trace amounts of H 2 S can induce local corrosion of X65 carbon steel, but there are few researches on the corrosion of low Cr steel. In this paper...

... metals & mining talus-like rock mass talus-like formation zhang upstream oil & gas talus-like ground mechanical characteristic monitoring point reservoir characterization steel construction activity rock mass tunnel upper bench tayi tunnel rock pressure deformation...

..., potentially leading to an inability to effectively produce the well. Usually, casing failure results from excessive stress concentration applied to the structural system (cement plus casing steel) loading bearing capacity. It has been documented (Dusseault, et al., 2001) that displacements created by shear...

... performance of four different rigid and flexible support systems. These systems were (i) lattice girder with shotcrete, (ii) lattice girder with shotcrete and additional steel ribs, (iii) steel fibre reinforced shotcrete (SFRS) and (iv) multi-layers of steel arches. Our analysis shows that despite...

... fiber rock mechanical testing refractive index Rock strain experiment strain measurement rock sample deformation step increase steel MPa steel adapter fiber optic 1. MOTIVATION Strain measurement of loaded rock samples is an essential part of mechanical characterization of the rock...

... ABSTRACT: This work is performed in the framework of feasibility study of underground repository for High-Levels radioactive Wastes. Based on the design concept of ANDRA, the retrievability of waster packages requires ensuring the mechanical stability of the steel liner for several thousand...

... until failure was observed in the form of radial cracks within the cement. cement property casing and cementing Radiograph cement formulation Upstream Oil & Gas radial stress sandstone US government strength steel boundary cement chemistry experimental apparatus cement annulus...

... rehabilitate the aged belt entry installing standing steel set supports. In the last several years, Keystone Mining Services, LLC (KMS) has been involved in several belt entry rehabilitation projects. To help the operator achieve expected additional service life and minimize production down time, KMS ground...

.... clay, steel and air) are taken into account in numerical simulation. Their mechanical behaviour are characterised by different constitutive models respectively. In order to overcome the eventual numerical difficulties and quantitatively reproduce the closing process of spaces presented in the disposal...

... Oil & Gas mining method stope presentation open stope carbonatite Reservoir Characterization Implementation American Rock mechanics Association ferroniobium Niobec niobium excavation esg solutions metals & mining steel uniaxial accelerometer 1 pillar seismic system 1...

... consider two stress-permeability models: tensile-failure and shear-failure. Tensile failure represents the creation of annuli at the steel-cement or cement-rock interfaces. Shear-induced damage is similar to a Mohr-Coulomb slip mechanism used to represent displacements on faults. Two injection conditions...

.... Since these openings will be in service for the entire life of the operation, mining industry generally installs roof bolts after rock excavation and either steel sets or reinforced shotcrete as long-term roof support. However, ground control for mine slopes has been traditionally practiced based...

...]. At some mine sites, failure of rockbolts due to SCC has occurred well within the twelve to eighteen month design life of longwall gateroads. Failure is often associated with installations in coal and carbonaceous shales containing clay bands. The use of very high tensile grade steel is commonly used...

... ABSTRACT: A method for calculating convergences in tunnels by means of measuring strains at several points of its contour is described. Either by using electrical resistance strain gages or fiber optics Bragg gratings attached to the steel arches of tunnel support, or bars that may...

... and steel sets, is warranted to prevent local loosening of rock blocks induced by thermal and seismic loads. These ground supports can be designed to sustain in-situ, thermal, and seismic loads anticipateduring the repository preclosure period. INTRODUCTION The long-term stability of underground...

... type of excavation machine. Displacement controlled laboratory experiments, specially designed to study the wear of steel chisels cutting different types of rock, have been carried out. Apart from the rock type the feed of the test chisels into the rock has been varied. Above a certain value of feed...

...: The computer program introduced in this paper is based on design guidelines developed for selection of support systems used in mine roadways. The support types considered include rock bolts as well as rigid and yieldable steel arches. Using the computer program, the design engineer can select the type, pattern...