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Keywords: reduction
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Proceedings Papers

Paper presented at the ISRM International Symposium - 8th Asian Rock Mechanics Symposium, October 14–16, 2014
Paper Number: ISRM-ARMS8-2014-009
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-024
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-040
... 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 oil sand complex reservoir...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-157
... 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...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-163
... validity of the proposed model is verified by numerical simulation. flow in porous media aperture Proportion cement grout Laboratory injection test Upstream Oil & Gas Simulation mechanism injection test water path grout density cement particle flow rate slit reduction relative...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-041
... period (microseconds) 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-151
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-134
... pillar metals & mining modification disturbance consequence reduction underground cavity chalk flooding Catastrophe level variation river ISRM International Symposium 2010 and 6th Asian Rock Mechanics Symposium - Advances in Rock Engineering, 23-27 October, 2010, New Delhi, India IMPACT...
Proceedings Papers

Paper presented at the ISRM International Symposium - 5th Asian Rock Mechanics Symposium, November 24–26, 2008
Paper Number: ISRM-ARMS5-2008-064
... 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...
Proceedings Papers

Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-005
... and gaseous emissions. noise reduction in construction phase. and overall, the underground solution minimises the visual intrusion, the damage to the landscape and the alteration of fauna and nora. From the point of view of the new technologies. many successfully accomplished underground projects...
Proceedings Papers

Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-059
... slip plane strength parameter parametric study reduction Upstream Oil & Gas cohesion procedure excavation displacement slope failure numerical investigation rock type Reservoir Characterization material property assumption monitoring Scale Rock Slope Failure deformation A...
Proceedings Papers

Paper presented at the ISRM International Symposium - 2nd Asian Rock Mechanics Symposium, September 11–14, 2001
Paper Number: ISRM-ARMS2-2001-134
... and compressive strength of mortar lining specimen at each curing time . Therefore. the reduction of compressive strength by vibration can be predicted by the reduction of P-wave velocity. Figure 4 (aI) shows the results of impact-vibration test on the mortar-lining specimen. P-wavc velocity of each...

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