... heterogeneous pebble accumulation body is critical. The cohesive force and internal friction angle are nonsynchronously reduced through the software program by comparing the slope equivalent to the plastic strain area calculated by nonsynchronous reduction step conditions with the stress and strain data...

... society iop publishing iop conf mechanism geologist geology reservoir geomechanics tunnel conference reservoir characterization stiffness journal rockburst geological subdiscipline environmental science 861 stability reduction schematic diagram plane rock mechanic chinese journal 11th...

... environment fraction sediment land reclamation remediation contaminated sediment mineral geologist sedimentology reservoir geomechanics geological subdiscipline hsse standard reservoir characterization strength cement issa residue reduction conference marine sediment compressive strength...

... swelling effect to some extent, which is favourable for field projects. The results of UCS strength tests show that both strength and Young's modulus of any type of coal are significantly reduced due to CO 2 adsorption, and the reduction is higher for super-critical CO 2 adsorption than sub-critical CO 2...

... ABSTRACT The plastic characteristics of the coal seam floor has been explored in this article on FEM stength reduction with the software of ANSYS, and the plastic area perforation process has been given. The slip scope given on FEM strength reduction are much close to the theoretical solution...

..., and the validity of the proposed model is verified by numerical simulation. flow in porous media aperture Proportion cement grout Laboratory injection test cement particle flow rate slit reduction Upstream Oil & Gas Simulation mechanism injection test water path grout density relative...

... Modulus and Internal Frictional Angle. The results are indicating a reduction of compressional velocity of about 20% at 1500C. The article describes the results and discusses the used methodology. thermal method enhanced recovery steam-assisted gravity drainage pore pressure reservoir...

... was 35.8 MPa, the strength of composite specimens having five segments was reduced by 50% to 17.9 MPa. This is despite the reduction in the slenderness ratio of each segment in the composite specimen that would usually result in an increase in strength. Less sensitive were changes in infill material having...

...) and accordingly metamorphous rock structure with lower porosity may be formed [18]. In these studies the porosity reduction also is considered due to grains compaction and/or creation of planar fractures around the perforation hole, and also validated by experimental results. petroleum engineering...

... on homes in the area. The matters are dependent on not only the airblast (sound) level but also the frequency. For reduction of airblast level, we have focused our studies on blasting free face area and blasting direction. And for control of frequency, we have focused on time delay of shot by using non...

... stability reduction climate change strength gallery water table pillar level variation underground cavity Catastrophe river ISRM International Symposium 2010 and 6th Asian Rock Mechanics Symposium - Advances in Rock Engineering, 23-27 October, 2010, New Delhi, India IMPACT OF CLIMATE CHANGE...

... to intersect of a fault with the rock mass surrounding the walls of this area (figure 1), various wedge-like rocks have been progressively sliding on the fault plane [1]. Sarcheshmeh mine is being expanded as a result of cut off grade reduction. Existence and extension of near parallel faults has made...

... investigation excavation Hong Kong environmental law underground structure state underground work reduction urban area underground world underground construction rock mass Upstream Oil & Gas drainage inflow tunnel exploration geology investigation perturbation construction...

... associate with a reduction of material strength parameters. The results of this investigation suggest that a sign of a large scale collapse might have been seen in a relatively early stage of the slope excavation procedure. I. INTRODUCTION As one of the practical data interpretation methods, Sakurai et...

... of cored hole at each rock block is about 100mm and the thickness of mortar lining model is about 12mm. strength specimen lining concrete Reservoir Characterization variation vibration level reduction tunnel Upstream Oil & Gas peak particle velocity concrete lining rock block...