... waste. Parallel to the geological exploration in Gorleben geotechnical investigations are executed in the shafts and in the investigation area of the exploratory mine. The investigations provide necessary site specific data and parameter for the design and development of the repository and for the long...

...-lived radioactive waste (HLW). An underground laboratory (HADES) has now been operational for more than 15 years. An extension of the facility is necessary to implement full-scale demonstration tests. Its construction started in 1997 and consists of the construction of a second shaft (1997-1999...

... was performed involving a full-scale driven pile. The pile was instrumented with earth pressure cells and piezometers on the shaft, as well as a pressure cell at the pile toe. The pile was static load tested at different points in time during a period of almost two years. During the whole time period the long...

... special engineering metamorphic slate geological requirement shaft tunnel PinLin Tunnel infrastructure project Republic SPECIAL ENGINEERING AND GEOLOGICAL REQUIREMENTS FOR INFRASTRUCTURE PROJECTS IN TAIWAN, REPUBLIC OF CHINA Manfred Kuehne1 and Arturo Schatzmann2 ABSTRACT Because...

... ABSTRACT: Western Areas Gold Mine. North shaft has experienced large magnitudes of induced mining stress which have caused creep deformational movements in the incompetent Basal tuffs of the Ventersdorp lavas. Under the present stress regime these weak rocks no longer behave elastically...

... ABSTRACT: Early shaft reef extraction would appear to provide a key to successful protection of vertical shafts and major service excavations in mines at great depth. This concept has been adopted at Western Deep Levels South Mine in preference to a more traditional shaft pillar approach...

... Reservoir Characterization mechanism overbreak atomic energy Fracture Zone Shaft Excavation Upstream Oil & Gas shear failure shaft underground research laboratory orientation proceedings excavation URL microseismic activity fracture failure mechanism underground excavation...

... and rockbursts and (f) Hoistino problem. 1 INTRODUCTION Kolar Gold Mines are located in SOuth east corner of Karnata~a in India and spread over a strike length of about 8 kms. Shafts have Sunk where cumulative depth is a Stagqerinq 64 km. Similarly, tunn- els driven amount to more than 1320 km. and other...

...). 2 HISTORY OF THE ANSIL DEPOSIT The Ansil copper deposit was discovered in 1981. A 1500 meter deep circular production shaft was sunk in 1984 and drill drifts were driven on the 7, 8 and 9 levels for final orebody delineation. The circular concrete lined production shaft is 6.71 meters (22 ft) 0.D...

... Upstream Oil & Gas situ stress domain excavation Reservoir Characterization orientation proceedings convergence result hydraulic fracturing microcrack shaft grey granite granite URL reservoir geomechanics atomic energy fracture zone 2 underground research laboratory...

... reservoir geomechanics surge shaft gallery shaft Upstream Oil & Gas surge shaft excavation stability excavation plant extension reinforcement rock wall aldeadavila hydro-power plant extension sluice gate chamber elevation excavation work Reservoir Characterization fissure...

... regulating reservoir. Consequently, the upper scheme has the following elements: – a 28 m high derivation dam (gravity type) – a 4,8 km long headrace tunnel. – a 6 m diameter surge shaft and a 2,6 m diameter and 132 m deep power shaft. – an underground power plant with an 1,0 km long access...

... two reversible-type 79MW peak load units are installed in two twin shafts, are the most important features of this scheme. The 60 m high shafts with a 17 m diameter cross section each are excavated in the left bank of the river, very close to the granitic slope of the Tamega valley, about 150 m away...

... ABSTRACT: A comprehensive overcore testing program is underway at the Canadian Underground Research Laboratory (URL). In the initial phase, 42 USBM overcore tests were conducted in vertical and near vertical drill holes from the shaft bottom at four depths during shaft sinking, and from...

... ABSTRACT: The paper describes investigations for a 965-metre head unlined pressure shaft at the Nyset-Steggje Hydropower Project in Western Norway. Site investigations have included in-situ rock stress measurements and hydraulic fracturing tests to verify the safe siting of the shaft. RESUME...

... ABSTRACT: An innovative approach for the determination of the in situ stress field during the construction of a shaft and a tunnel is evaluated. The stress changes that resulted during face advance were recorded by stiff inclusions measuring uniaxial stress changes. From these stress change...

... ABSTRACT: This article describes a simplified method of determining the in situ stress by hydraulic fracturing to evaluate the safety of pressurized tunnels and shafts. Test data from four hydropower plants in South Norway are presented, the interpretation of the stresses discussed...

... SUMMARY: The paper describes pre-investigations for a 1000-metre head unlined pressure shaft at the Nyset-Steggje Hydro-Power Project in Western Norway. The field investigations performed have included a thorough engineering geological mapping of rock types, joint patterns and zones...

... steel lining energy loss tunnel Reservoir Characterization pressure tunnel lining water level water pressure shaft power station kroner sima power plant supply system surge shaft operation air cushion chamber unlined tunnel HIGH PRESSURE TUNNEL SYSTEMS AT SIMA POWER PLANT...

... SUMMARY: Nowadays the lining of shafts in coal mining is built in reinforced concrete for water bearing non-stable stratum. For great depth often a steel/reinforced concrete composite construction method is used. The non-rock connected shaft lining is predominantly loaded by the hydrostatic...