... ABSTRACT This study shows a procedure of the geotechnical investigation, ground stability analysis and a recommendation on the ground treatment as counter-measures against coal mining subsidence in Korea. In the study area, the coal seams distribute irregularly with uneven thickness due...

... ground transportation experiment membrane subsidence cavity rail transportation full-scale test tensile force fill material localised sinkhole reinforcement geosynthetic sheet geosynthetic reinforcement sinkhole embankment diameter assumption geometry straight cylinder design...

... of trying to formalise the use of field measurements in geotechnical engineering, applies already to the first sentence of his work today. geotechnical engineering convergence reduction construction observational method effective angle subsidence invert rib field measurement calibration...

...NUMERICAL INVESTIGATIONS OF INCLINED LANDFILL LINER SYSTEMS Helmut MeiBner1, Katja Abef ABSTRACT Liner systems of landfills placed on slopes are subjected to stress due to displacements of waste. Waste displacements result from settlements and from subsidences of waste material in the landfill...

... of Melbourne. The road collapse was associated with a 4m diameter sewer tunnel being driven through mixed soil conditions under compressed air at a depth to the crown of about 18m . Emergency grouting was conducted from tunnel level and the road surface after the road surface had subsided over 400mm. Over...

... OF HELIKE The splendid city of Helike is said to have disappeared under the sea, with all of its citizens, in 373 BC. The wording suggests ground subsidence, slides, and a tsunami. Judging from literary and historic references Helike must have been a big city on the coast with a famous sanctuary...

...THE APPEARANCE OF INHOMOGENEOUS DISTURBANCES IN THE MECHANICAL PROPERTIES OF SOIL IN MINING AREAS Henryk Marcak1 ABSTRACT Mining areas of Poland experience sudden deformations of rock formations near the ground surface. These may be described using mathematical models for subsidence, which have...

... stiffness. Fig.3 compares time histories of subsidence which were recorded at the ground surface near the top of a slope. It is clearly seen therein that the greater bending stiffness made the displacement smaller. Similar conclusion is drawn from Fig.4 for lateral displacement as well. One of the important...

.... Development of the surface in these areas has therefore been severely restricted, and subsidences have been common. The East Rand Metropolitan Transport Authority (ORMET) decided to investigate the feasibility of using this undermined land for the purposes of major road routes. To render this land suitable...

... to exist within a 5m to 10m wide zone across the contact. Surface monitoring at the Cleveland site has revealed that subsidence at that location has been continuing for a period of at least 10 years. These two case studies illustrate that mining at considerable depths below surface can cause surface...

... accurate modeling of wave propagation is necessary. 4 MECHANISTIC STUDIES The use of distinct element codes to study likely mechanisms associated with excava- tion in jointed rock is demonstrated for the following two examples. The first in- dicates potential affects of the joint structure on subsidence...

... reservoir geomechanics compressibility prediction Reservoir Characterization Fluid Dynamics Loading Rate Upstream Oil & Gas Geertsma subsidence stress field literature mechanical effect cavity fracture hydraulic fracturing Reservoir Compaction compaction general report...

... of the reservoir for- mation (compaction) will increase the driving ener- gy for production but may also lead to increased solids production in wells, well casing collapse, per- meability decline, pore volume reduction and land Surface subsidence. Localised displacements of weaker stratigraphic horizons within...

...STOPPING OF GROUND SUBSIDENCES CAUSED BY CAVE-IN APPLYING ROCKBOLTS OR HYDRAULIC FILLING IN SHALLOW UNDERGROUND CAVERNS Die Eindammung von durch Hohlraumeinbruch verursachten Gelandesenkungen durch die Anwendung von Felsnageln und Spulverfahren in oberflachennahen Kavernen L'endiguement des...

... reservoir Thickness longwall face level entry coal seam gas coal burst sandstone stress concentration coalbed methane relation Proportion subsidence roof subsidence Proceedings of the International Symposium on Weak Rock / Tokyo /21-24 September 1981 Mechanical behavior of coal seam...

... of the materials underlying mOst part of the terrain concerned, surface erosion was not important; on the other hand, mass movement of certain kind took place from time to time as being detected from the intermittent sUbsidence of the highway which was also on the colluival deposit, after heavy rain, that had been...

... of instability of some crystalline schist slop- es and it acts a vital role in landslides triggered by vertical subsidence (Sassa et al. 1980a,b) 2 BRIEF VIEW OF THE ZENTOKU LANDSLIDE The authors have studied one of biggest crystalline schist landslides "the Zentoku landslide" in Japan since 1972. The land...

... in different places, like Hokkaido, Chiba, Niigata, Miyazaki, Okinawa etc.. The extraction of water containing natural gas caused the surface subsidence, since the development of it began. Of recent, levelling surveys show a stop of surface subsidence, and a beginning of probable ground rebound, as a result...