... is during the mining operation when weak underclay layer squeezes under pillar stress and results in punching or bearing capacity failure. The second stage is after slurry backfilling. During this stage, the slurry material soaks non-durable floor layers and causes strength reduction in floor material...

... Upstream Oil & Gas efficiency factor footing Montreal criterion Reservoir Characterization bearing capacity 13th international congress rock mass Computation hoek-brown material foundation rock mechanics isrm13 hoek-brown failure criterion shear zone fahimifar ultimate...

... of the bolts, resin and the surrounding rock mass so-called cable-resin-rock system (CRR system). The bonding length and bolt/borehole diameter ratio strongly influence the final bearing capacity of the CRR system. The study presents the behaviour of CRR system during a pull-out test which is usually used...

... stability of the strata skin between the bolts. Strength tests performed on 5mm thick polymer sheets of indicate load bearing capacities comparable to the heavy duty steel mesh currently used as a skin support underground. Puncture tests and polymer adhesion to the substrata indicate that the polymer TSL...

... roof bolting and standing (conventional) supports. The calculation of a load bearing capacity of roadway supports contains period of drivage and period of mining in the vicinity of roadways. The load bearing capacity of supports during drivage is based on the size of the natural arch, the loading...

... Reservoir Characterization Rock mechanics Investigation Serrano exploratory gallery reservoir geomechanics correlation discontinuity classification borehole investigation Upstream Oil & Gas dam site bearing capacity bakhtiary dam site foundation hydropower plant project rock...

... reservoir geomechanics friction deep foundation diameter Upstream Oil & Gas weathered rock Olalla Wellbore Design hard rock tip bearing capacity bearing capacity Madrid tip strength MPa unconfined compressive strength Reservoir Characterization strength formula gypsum...

..., Portugal ABSTRACT: In Eurocode 7 (EC7), some guidelines are provided for the design of spread foundations built on rock masses. Moreover, a method for the calculation of the bearing capacity for this type of foundations is suggested. However, it does not take into account important factors that influence...

... ABSTRACT In this paper, the ultimate bearing capacity of a discontinuous rock foundation is investigated using limit analysis. Upper bound formulations are developed for a rock mass containing two orthogonal joint sets in which, the orientation of the first joint set was assumed to be 15°, 30...

... criterion Serrano MPa abutment rock foundation safety factor Upstream Oil & Gas Rock mechanics gravity concrete dam rock mass dam body geotechnical parameter jointed rock foundation principal stress roodbar lorestan dam allowable bearing capacity bearing capacity compression...

... of rock-socketed piles have been gained. Regard socketed segment as a space system, XU[1] analyzed character of load transfer of socketed segment. MING[2] indicated that ultimate bearing capacity of socketed pile was made up of inlaid resistance and end resistance, when deepness socketed in rock was four...

... Discussion on the load bearing capacity of ground and the stability of tunnel is presented. We derive a simplified solution of a circular lined-tunnel in an elastic ground. The solution results in a better understanding of characteristic curves. Use of DEM allows us to consider effects...

... with the installation of rockbolts. displacement material property mechanism rockbolt hole diameter bearing capacity anchorage system resin annulus metals & mining resistance pullout test test program stiffness load displacement curve MPL diameter encapsulated rockbolt Anchorage...

... that as the contact surface between shotcrete and con- crete lining was rougher, the more decreased bearing capacity against the cracking. - n ' . " l If the thickness of the shotcrete increased, its bearing capacity alsoincreased linearly with the thickness. However, as the thick- ness increased, the deflection...

... ABSTRACT: The new pillar design method by Hou/Lux takes up the theoretical statements and experiences for the determination of the short-term load bearing capacity of pillars and the necessary safety coefficients already to be found in the methods by Menzel and Uhlenbecker. However, it also...

... bearing capacity geophysical method geologist Foundation problems on cavernous limestone formation.. - Prooternes de fondation sur les roches calcaires GrOndungsprobleme in Kalkstein mit Hohlraurnen A. A. M. ELLEBOUDY, Banha University, Cairo, Egypt 'C. . . ABSTRACT: Investigations revealed...

... properties were found important in consideration of deformation properties of foundation structures. On evaluation of bearing capacity, applicability of formulae of bearing capacity based on plasticity theory. (1) was given with a condition that a foundation was rigid with shallow depth of embedment...

..., Ankara, Turkey ABSTRACT: Plate loading tests were carried out in Seyitorner lignite coal mine both to determine the bearing capacity of the spoil pile and to predict the amount of penetration for the shoes of a walking dragline. Eleven tests with square plates of 20 em, 30 em, 50 em and 80 cm side length...

... of stress-strained state of dam and foundation taking into-account their joint operation and bearing capacity of dam - foundation~ system is of great importance in the project. ccording to the existing in the USSR building codes and regulations (SNiP). upstream face contact stress investigation...

... II!lII_ Strength and bearing capacity of rock foundations of concrete dams Resistance et capaclte portante des fondations rocheuses des barrages en baton Festigkeit und Tragfahigkeit der FelsgrOndungen von Betonstaumauern D.D.SAPEGIN, The B.E.Vedeneev All-Union Research Institute of Hydraulic...