... countermeasure surface layer stabilization method soil stabilization method improvement ratio stress concentration ratio model test hydraulic jack surface stabilization method shear angle vertical load load dispersion effect geogrid method low improvement ratio embankment geogrid...

... ABSTRACT: In this paper, the behaviour of lime/cement columns under lateral loading has been examined by performing five shear box model tests. Tests were conducted with singular lime/cement columns and with rows of columns with and without screw anchors. The lime/cement columns were installed...

... coalbed methane model test upper end metals & mining complex reservoir immediate roof weighting coal bed methane Upstream Oil & Gas Prop Strata Movement roof behavior coal seam gas displacement Strata Behavior Strata Control DEM model stability dip angle dip direction...

..., and that there was a certain limit of the lateral displacement of the quay wall although the no sand-boiling zone becomes large. A series of small model tests was conducted to clarify the effect of the liquefied extent in back fill ground behind the quay wall to its displacement. It was found from this model test...

... ABSTRACT: Model tests on free standing pile groups and piled footings with varying pile spacing in dense sand were carried out. In this study, the contributions of pile caps to the behaviors of vertically loaded pile groups were analyzed by comparing the bearing behaviors in piled footings...

...Rock at GreatDepth, Maury & Fourmaintraux (eds), © 1989 Balkema, Rotterdam. ISBN 90 6191 9754 High temperature rock strength and model tests for modeling in-situ coal gasification Modeles numeriques et essais de resistance des roches a temperatures elevees pour l'etude de la gazeification in situ...

... foundations is investigated using the finite difference computer code FLAC and compared with the results obtained from the laboratory model tests. When average stresses acting on pillars are approximately 2,8 times the uniaxial compressive strength of foundation rock, fracturing of the foundations can soften...

... ABSTRACT: Author collect a lot of informations about stability calculation. model test and monitoring on site for surrounding rock in the Laxiwa. Ertan. Lubuge underground plant etc. and Jingchuan tunnel.trying to find out its deformational law in high in-situ stress region and trying to put...

.... since 1980, the laser speckle method with its obvious advantages was lntroduced in the field of rock test and structural model test of hydropower pro- jects. In recent years, a series of practical laser speckle techniques improved and developed by us as follows: the method of superimposition...

... is presented elsewhere (Olsen 1978). 1 EXPERIMENTAL APPARATUS AND PROCEDURES 1.1 Lateral Stress Equipment Model tests of coring and plugging were run in a lateral stress cell - shown schematically in Figure 1. This cell was constructed to accommodate a 3.75-inch diameter by 2-inch high cylindrical sample which...

... in French mines /3/. The satisfactory results of horizontal bolting have not been fully ex- plained or confirmed yet in the scientific research. The known theories 8 - Fig. 4. View of the bolted side of bolting as a support of roof cannot be applied here. The model tests and field observations can...

... and maintenance of the longwall workings. metals & mining load-bearing capaoity face support operation diagram whioh immediate roof strata cohesive roof strata model test seam root strata rock mass Prop construction longwall face roof strata solid coal strata functional relationship...