..." and the "cavity" fig. 1. The shape of tbe sections ranges from shallow to dee]? The sidejl can have different angles in 'relation tovthe floor. The ceiling is JIlostly f.let .for a j',cavity" directly below the surface and vaulted for deeply located varieties owing to the lines of force from surrounding soil, fig...

... needed for a storage cavity of several hundred thousand cubic metres only represents about fifteen square metres for the top end of the shaft, with the stand pipes and valves only rising to a height of less than three metres. Each shaft head is surrounded by a concrete slab covering about 1,500 square...

... by porosity to about 15% and due to the presence of erosion channel and cavities. Large quantities of groundwater in the porespaces make the sandstone a good confined and unconfined aquifer due to interlayering with shale. The granite is medium to coarse grained with large size felspar. Physical and chemical...

...HYDROCARBON STORAGE IN CAVITIES LEACHED OUT OF SALT FORMATIONS Ph. Bondy* and J. Legrenenr** *Gaz de France, Underground Reservoir Department, 19 rue Alphonse de Neuville, Paris, France **SOFREGAZ, Underground Storage Department, 98 boulevard Victor Hugo, Clichy, France ABSTRACT The extreme...

... for sto- rage in the hard rock terrain and the abandoned mines have been outlined. Delineation of old unknown workings and safe measures for stability of underground cavities in hard and soft rocks have further been discussed. INTRODUCTION Central India abounds a complex environmental set up due...

... deformation structural geology rock strength maximum strength cavity unfavourable geological condition UNDERGROUND STORAGE AND POST PEAK ROCK BEHAVIOUR APPLICATIONS TO DIFFICULT AND UNFAVOURABLE GEOLOGICAL CONDITIONS V. Maury and B. Came Geostock, Tour Aurore, Cedex 05 - 92080 Paris La Defense, France...

... hydraulic mining cavity underground mining POTENTIAL FOR THE UNDERGROUND MINING OF OIL SANDS IN CANADA K. E. Mathews Golder Associates, Vancouver, British Columbia, Canada ABSTRACT The vast majority of the oil sands occur at depthe beyond the limits of economical open pi t mining. Research has been...