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Advantages of single pass blind shaft drilling
210A
Radioactive waste disposal See also: 865071
865317 Solving the problems of piloting a tunnel through swelling anhydrite Martin. D Tunn Tunnlg V18. N3, March 1986, P55-57
865313 Natural evolution of a long life radioactive wastes disposal site: modelization trial from a geoprospective approach (In French) Canceill, M; Billaux, D: Courbouleix, S; Fourniguet, J; Godefroy, P; Gros,Y; Lajoinie, J P; Laville, P; Peaudecerf, P; Robelin, C lnt Assoc Engng Geol Bull N32, Dec 1985, P25-47
A 5.2m diameter tunnel on the Stuttgart-Mannheim railway line near Karlsruhe, Germany, passes through an area of difficult geology, consisting largely of anhydrous gypsum, prone to swelling on contact with moisture. To overcome this problem, a prototype design of blade shield TBM, working under compressed air to prevent moisture ingress, was developed. A rail mounted concreting train was used to minimise time between mixing and application of shotcrete, minimising deterioration in quality due to settlement.
Underground construction methods
865318 Free flow for Hamburg's deep sewer syphon Wallis, S Tunn Tunnlg VI8, N4, April 1986, P35-38
See also." 865200
865314 Cost efficiency comparison between shotfired and mechanised drivages (In German and English) Wild, H W Gluckauf V122, N5, 6 March 1986, P353-359 (german), P112-114 (english) Mechanised (full face tunneller or boom type roadheader) and shotfired drivages are examined on a cost basis, taking into account length of drivage and rate of face advance. Cost curves allow cost efficiency comparisons to be made. The combined use of mechanised and shotfired methods in the same drivage also offers a practical alternative.
865315 Stable pits and bunkers fashioned by raise boring (In German and English) Grossekemper, H J; Tonscheidt, H W Gluckauf V122, N7, 10 April 1986, P483-490 (german), P144-148 (english) Raise boring of shafts and storage bunkers up to 5.5m in diameter in underground mines in Germany is described. Some available equipment is reviewed. The importance of correct location of shafts to avoid geological faults or weak zones is emphasised, and shaft lining procedures and the future potential for this method are examined.
This 2.2km, 3.2m i.d. tunnel was driven at depths of 65-85m. The ground was largely homogeneous micaceous clay, but the possibility existed that water-bearing quaternary channel could be encountered. A Lovat TBM, which can be converted to an earth pressure balanced shield, was used for construction. An initial 4.6m o.d. tunnel with a 300ram thick concrete segmented lining was driven and a 400mm thick in situ concrete lining completed construction. The tunnel was completed on time and without meeting poor ground, the earth pressure balanced shield remaining unused. If such conditions had arisen, forethought in selecting equipment would have still ensured prompt completion.
8653 ! 9 Advantages of single pass blind shaft drilling Martin, D Tunn Tunnlg VI8, N4. April 1986, P71-72 A 3.75m diameter, 219m deep ventilation shaft at a South Wales colliery is under construction by single pass blind shaft drilling. The geology is mixed strata - mudstones, clays, hard sandstone and coal seat earth. After construction of a 20m deep foreshaft, the remainder is continuously excavated by blind drilling. A bentonite slurry supports the shaft until the final steel lining is installed. Details are provided of the drill rig, anciltiary equipment and its operation.
Surface subsidence, caving and rockbursts
865316 Dywidag system bores through difficulties Ze[I, S l~licrotunnlg 1/2, NI, 1986, PI7-21
865320 Minimisation of surface subsidence by design of mine workings Holla, L Bull Proc Austral lnst Alin Metal V290, N6, Sept 1985, P5359
This system, designed for difficult soils and routes, involves microtunnelling in two stages. Steel drivage pipes of 860mm OD, which allow access to the cutting head, in emergencies, are jacked behind a cutting head, forming an ultralong, steel pipe, articulated shield. The head is designed to remove all soils, even in groundwater, and can reduce and transport even the hardest rock obstacles. Once the cutting head has reached the target shaft, product pipes of the same OD but with the chosen internal design are jacked through, the drivage pipes being removed from the target shaft for further use. Examples of the use of the system in difficult conditions in Germany are presented.
By engineering the design of underground mining layouts, a method of minimising surface movements to a tolerable degree is available. Sensible use of special design layouts would enable the recovery of millions of tonnes of coal currently being sterilised. The analysis of subsidence data collected from field surveys over Iongwall panels in the southern coalfield of NSW, Australia, allows assessment of the effect of pillars left unmined between Iongwall panels in reducing surface subsidence. Design layouts are discussed. The availability of a wide variety of layouts with ranging degrees of surface movements affords a considerable flexibility in designing layouts to suit a particular situation.
© 1986 Pergamon Journals Ltd. Reproduction not permitted
Radioactive waste disposal See also: 865071
865317 Solving the problems of piloting a tunnel through swelling anhydrite Martin. D Tunn Tunnlg V18. N3, March 1986, P55-57
865313 Natural evolution of a long life radioactive wastes disposal site: modelization trial from a geoprospective approach (In French) Canceill, M; Billaux, D: Courbouleix, S; Fourniguet, J; Godefroy, P; Gros,Y; Lajoinie, J P; Laville, P; Peaudecerf, P; Robelin, C lnt Assoc Engng Geol Bull N32, Dec 1985, P25-47
A 5.2m diameter tunnel on the Stuttgart-Mannheim railway line near Karlsruhe, Germany, passes through an area of difficult geology, consisting largely of anhydrous gypsum, prone to swelling on contact with moisture. To overcome this problem, a prototype design of blade shield TBM, working under compressed air to prevent moisture ingress, was developed. A rail mounted concreting train was used to minimise time between mixing and application of shotcrete, minimising deterioration in quality due to settlement.
Underground construction methods
865318 Free flow for Hamburg's deep sewer syphon Wallis, S Tunn Tunnlg VI8, N4, April 1986, P35-38
See also." 865200
865314 Cost efficiency comparison between shotfired and mechanised drivages (In German and English) Wild, H W Gluckauf V122, N5, 6 March 1986, P353-359 (german), P112-114 (english) Mechanised (full face tunneller or boom type roadheader) and shotfired drivages are examined on a cost basis, taking into account length of drivage and rate of face advance. Cost curves allow cost efficiency comparisons to be made. The combined use of mechanised and shotfired methods in the same drivage also offers a practical alternative.
865315 Stable pits and bunkers fashioned by raise boring (In German and English) Grossekemper, H J; Tonscheidt, H W Gluckauf V122, N7, 10 April 1986, P483-490 (german), P144-148 (english) Raise boring of shafts and storage bunkers up to 5.5m in diameter in underground mines in Germany is described. Some available equipment is reviewed. The importance of correct location of shafts to avoid geological faults or weak zones is emphasised, and shaft lining procedures and the future potential for this method are examined.
This 2.2km, 3.2m i.d. tunnel was driven at depths of 65-85m. The ground was largely homogeneous micaceous clay, but the possibility existed that water-bearing quaternary channel could be encountered. A Lovat TBM, which can be converted to an earth pressure balanced shield, was used for construction. An initial 4.6m o.d. tunnel with a 300ram thick concrete segmented lining was driven and a 400mm thick in situ concrete lining completed construction. The tunnel was completed on time and without meeting poor ground, the earth pressure balanced shield remaining unused. If such conditions had arisen, forethought in selecting equipment would have still ensured prompt completion.
8653 ! 9 Advantages of single pass blind shaft drilling Martin, D Tunn Tunnlg VI8, N4. April 1986, P71-72 A 3.75m diameter, 219m deep ventilation shaft at a South Wales colliery is under construction by single pass blind shaft drilling. The geology is mixed strata - mudstones, clays, hard sandstone and coal seat earth. After construction of a 20m deep foreshaft, the remainder is continuously excavated by blind drilling. A bentonite slurry supports the shaft until the final steel lining is installed. Details are provided of the drill rig, anciltiary equipment and its operation.
Surface subsidence, caving and rockbursts
865316 Dywidag system bores through difficulties Ze[I, S l~licrotunnlg 1/2, NI, 1986, PI7-21
865320 Minimisation of surface subsidence by design of mine workings Holla, L Bull Proc Austral lnst Alin Metal V290, N6, Sept 1985, P5359
This system, designed for difficult soils and routes, involves microtunnelling in two stages. Steel drivage pipes of 860mm OD, which allow access to the cutting head, in emergencies, are jacked behind a cutting head, forming an ultralong, steel pipe, articulated shield. The head is designed to remove all soils, even in groundwater, and can reduce and transport even the hardest rock obstacles. Once the cutting head has reached the target shaft, product pipes of the same OD but with the chosen internal design are jacked through, the drivage pipes being removed from the target shaft for further use. Examples of the use of the system in difficult conditions in Germany are presented.
By engineering the design of underground mining layouts, a method of minimising surface movements to a tolerable degree is available. Sensible use of special design layouts would enable the recovery of millions of tonnes of coal currently being sterilised. The analysis of subsidence data collected from field surveys over Iongwall panels in the southern coalfield of NSW, Australia, allows assessment of the effect of pillars left unmined between Iongwall panels in reducing surface subsidence. Design layouts are discussed. The availability of a wide variety of layouts with ranging degrees of surface movements affords a considerable flexibility in designing layouts to suit a particular situation.
© 1986 Pergamon Journals Ltd. Reproduction not permitted