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Passing under a cavity in workings at the Haus Aden colliery (in German)
321A 915436 solid ~lste
ImdfiB
performance during the Loma
Prieta
ear&quake Orr, W R; Finch, M 0 Z%OC Symposium on Georechnics of Waste Fills - Theory and Practice, Z’ittsburg, IO-Z3 Sept 1989 P22-30. Pub1 Philadelphia: ASTM. 1990 (ASTM Special Technical Publication 1070) Following the magnitude 7.1 earthquake in California, the performance of 10 landfills was assessed. Modified Mercalli intensity custom&d for landfills was determined. Maximum intensities were VII at the epicentre and VI for bay muds. Estimated peak horizontal accelerations were O.lO-0.45g. The most important parameters affecting the seismic behaviour of landfills appear to be earthquake acceleration and duration. Recommendations are made for safe design of municipal fills.
Underground Excavations Geological factors of importance in underground excavations 915437 Passing under a cavity in workings at the Haus Aden colliery (In German) Kuppig, R, Thyrock, K Gluckauf V127, N5/6, March 1991. P186-188 Further development of a seam required traversing a cavity of height about 6m, depth about 3.5m (total volume 220 cubic m), which occurred around a fault in the roof rocks where seam gradient changed from 32 deg to 9 deg. The large cavity was successfully backfilled using foamed concrete with an expansion factor of 1: 10, such that only 22 tonnes of concrete were needed for the cavity. Backfilling rates of up to 7.5 cubic m/h were achieved. 915438 Direction analysis of bore-boleovalities and wall overbreaks in exploration drilling in tke Rukr coalfield (In German) Hees, K D; Huwe, H W, Murbach, U G~ckauf@rschungsh V52, NI, Feb 1991, P28-36 Large amounts of data from the Ruhr coalfield have been analysed. A detailed evaluation in which the direction and direction change of bed inclination and borehole deflections are compared to the alignment of borehole ellipses at every drilling depth is presented. There are no discernable, unambiguous, direction-related or depth-related underlying principles. This suggests that a multiplicity of influencing factors exists, and that definite interpretations from the direction of borehole ellipses are of doubtful value. 915439 FIatjack measurements test lining behaviour in a Swiss ra4 tunnel Steiner, W; Rossi, P P; Devin, P Tunn Tum& V23. NJ, March 1991, P61-63 The 12.6km Wisenberg Tunnel will run through the Jura mountains, where swelling pressures are expected, in particular in formations of anhydric shale. Lining performance in similar conditions was examined in the Hauenstein Tunnel, built in 1912-1916 and requiring considerable repairs in the 1920s and 1980s. A series of 35 flat jack measurements was 0
made, enabling the range of swelling pressures and their development with time to be estimated. Lining for the Wisenbcrg tunnel is designed on the basis of this information. 915440 Pen-y-Clip site investigation Arber, A W; Selley, P J World Tunnlg V4, N2, April 1991, P112-116 The Pen-y-Clip tunnel section is part of the A55 North Wales Coast Road project. The headland is a microdiorite intrusion overlain by scree mixed with glacial till, rockfall debris, and boulder fields. Deep rotary core drilling was possible only with extreme difficulty and slowness, because of geological and access conditions. Tunnel alignment was constrained by necessity to site portals with adequate rock cover in areas of low risk of rockfall. Excavation will be by drill and blast, with support according to Q and RMR methods. Extensive scaling and rockbolting of the hillside will be necessary to minim& blasting-induced rockfalls. 915441 Stress relief jointing in eaatem Kentucky Sames, G P; Moebs, N N Rock Mechanics Contributions and Challenges: Proc 3Zst US Symposium, Go&n, 18-20 June I990 P439-446. Pub1
Rotterdam: A A Balkema. 1990 A research programme was launched by the USBM to characterize roof conditions near outcrop in drift coal mines of eastem Kentucky. Data were collected on the rock joints, their trends, degree of weathering, and frequency of occurrence. Comparisons of data from different localities were performed. Origins of the joint sets were also analysed. 915442 Geological prediction in the Jundushan Tunnel Liang Jinhuo; Sun Guangzhong Proc 6th International Congress Znternational Association of Engineering Geology, Amster&un, 6-10 August 1990 VI, P683-689. Pub1 Rotterdam: A A Balkema, 1990 The 8.4km long railway tunnel in northern Beijing runs through andesite, granite, syenite, and porphyry rocks, plus loess at the west portal. The rocks are intensely fractured and faulted in many places, and frequent collapse has resulted. To predict difficult geological conditions in advance, projection of planar structures from the surface, mapping of pilot tunnels, projecting structures ahead of the working faces, examination of joint properties, groundwater, and strain minerals, and a combination of all these methods have been used. Difficult zones have been predicted with accuracy of over 70%. 915443 Rock eonditiolrs at Quarry Bay station applied to cavern constmction ia Hong Kong Matson, C R Proc Sew#iaar Rock Cavern-Hong Kong, Hong Kong, 8-9 December 1989 P271-292. Pub1 London: IMM, 1989 The design and construction for the Quarry Bay station in Hong Kong are discussed. The support and lining system for the tunnels, which was deliberately designed to provide as much flexibility for the contractor as possible for the full range of expected ground conditions, is also outlined. A record of the actual ground conditions encountered during construction was provided by the detailed logging and continuous rock mass classification of nearly 2500 metres of tunnels.
1991 Pergamon Press plc. Reproduction
not permitted
ImdfiB
performance during the Loma
Prieta
ear&quake Orr, W R; Finch, M 0 Z%OC Symposium on Georechnics of Waste Fills - Theory and Practice, Z’ittsburg, IO-Z3 Sept 1989 P22-30. Pub1 Philadelphia: ASTM. 1990 (ASTM Special Technical Publication 1070) Following the magnitude 7.1 earthquake in California, the performance of 10 landfills was assessed. Modified Mercalli intensity custom&d for landfills was determined. Maximum intensities were VII at the epicentre and VI for bay muds. Estimated peak horizontal accelerations were O.lO-0.45g. The most important parameters affecting the seismic behaviour of landfills appear to be earthquake acceleration and duration. Recommendations are made for safe design of municipal fills.
Underground Excavations Geological factors of importance in underground excavations 915437 Passing under a cavity in workings at the Haus Aden colliery (In German) Kuppig, R, Thyrock, K Gluckauf V127, N5/6, March 1991. P186-188 Further development of a seam required traversing a cavity of height about 6m, depth about 3.5m (total volume 220 cubic m), which occurred around a fault in the roof rocks where seam gradient changed from 32 deg to 9 deg. The large cavity was successfully backfilled using foamed concrete with an expansion factor of 1: 10, such that only 22 tonnes of concrete were needed for the cavity. Backfilling rates of up to 7.5 cubic m/h were achieved. 915438 Direction analysis of bore-boleovalities and wall overbreaks in exploration drilling in tke Rukr coalfield (In German) Hees, K D; Huwe, H W, Murbach, U G~ckauf@rschungsh V52, NI, Feb 1991, P28-36 Large amounts of data from the Ruhr coalfield have been analysed. A detailed evaluation in which the direction and direction change of bed inclination and borehole deflections are compared to the alignment of borehole ellipses at every drilling depth is presented. There are no discernable, unambiguous, direction-related or depth-related underlying principles. This suggests that a multiplicity of influencing factors exists, and that definite interpretations from the direction of borehole ellipses are of doubtful value. 915439 FIatjack measurements test lining behaviour in a Swiss ra4 tunnel Steiner, W; Rossi, P P; Devin, P Tunn Tum& V23. NJ, March 1991, P61-63 The 12.6km Wisenberg Tunnel will run through the Jura mountains, where swelling pressures are expected, in particular in formations of anhydric shale. Lining performance in similar conditions was examined in the Hauenstein Tunnel, built in 1912-1916 and requiring considerable repairs in the 1920s and 1980s. A series of 35 flat jack measurements was 0
made, enabling the range of swelling pressures and their development with time to be estimated. Lining for the Wisenbcrg tunnel is designed on the basis of this information. 915440 Pen-y-Clip site investigation Arber, A W; Selley, P J World Tunnlg V4, N2, April 1991, P112-116 The Pen-y-Clip tunnel section is part of the A55 North Wales Coast Road project. The headland is a microdiorite intrusion overlain by scree mixed with glacial till, rockfall debris, and boulder fields. Deep rotary core drilling was possible only with extreme difficulty and slowness, because of geological and access conditions. Tunnel alignment was constrained by necessity to site portals with adequate rock cover in areas of low risk of rockfall. Excavation will be by drill and blast, with support according to Q and RMR methods. Extensive scaling and rockbolting of the hillside will be necessary to minim& blasting-induced rockfalls. 915441 Stress relief jointing in eaatem Kentucky Sames, G P; Moebs, N N Rock Mechanics Contributions and Challenges: Proc 3Zst US Symposium, Go&n, 18-20 June I990 P439-446. Pub1
Rotterdam: A A Balkema. 1990 A research programme was launched by the USBM to characterize roof conditions near outcrop in drift coal mines of eastem Kentucky. Data were collected on the rock joints, their trends, degree of weathering, and frequency of occurrence. Comparisons of data from different localities were performed. Origins of the joint sets were also analysed. 915442 Geological prediction in the Jundushan Tunnel Liang Jinhuo; Sun Guangzhong Proc 6th International Congress Znternational Association of Engineering Geology, Amster&un, 6-10 August 1990 VI, P683-689. Pub1 Rotterdam: A A Balkema, 1990 The 8.4km long railway tunnel in northern Beijing runs through andesite, granite, syenite, and porphyry rocks, plus loess at the west portal. The rocks are intensely fractured and faulted in many places, and frequent collapse has resulted. To predict difficult geological conditions in advance, projection of planar structures from the surface, mapping of pilot tunnels, projecting structures ahead of the working faces, examination of joint properties, groundwater, and strain minerals, and a combination of all these methods have been used. Difficult zones have been predicted with accuracy of over 70%. 915443 Rock eonditiolrs at Quarry Bay station applied to cavern constmction ia Hong Kong Matson, C R Proc Sew#iaar Rock Cavern-Hong Kong, Hong Kong, 8-9 December 1989 P271-292. Pub1 London: IMM, 1989 The design and construction for the Quarry Bay station in Hong Kong are discussed. The support and lining system for the tunnels, which was deliberately designed to provide as much flexibility for the contractor as possible for the full range of expected ground conditions, is also outlined. A record of the actual ground conditions encountered during construction was provided by the detailed logging and continuous rock mass classification of nearly 2500 metres of tunnels.
1991 Pergamon Press plc. Reproduction
not permitted